ALKYL RADICALS - Storming Media

Unsymmetrical Polynitrocarbonates and Symmetrical 1,3-Bis (Halo-and Nitroalkyl Carbonyldioxy)-2,2-Dinitropropanes and Methods of Preparation.

03 MAR 1982

Authors: William H. Gilligan; Scott L. Stafford; DEPARTMENT OF THE NAVY WASHINGTON DC

The full text of this report is not available and therefore is not for sale. This information is provided for reference purposes only.

This invention relates to organic carbonates and more particularly to nitro substituted organic carbonates. In order to prepare unsymmetrical carbonates, it is necessary to react a chloroformate of an alcohol with a second alcohol. The general method for preparing chloroformates is to react an alcohol with an excess of phosgene (poisonous gas) in the presence of a base as an acid acceptor. Inevitably a greater or lesser amount of the ...

The Protective Mechanism of Action of Amines in Diphtheria Toxin Treated Vero Cells

23-Feb-1982

8 pages

Authors: Rebecca B Dorland; ARMY MEDICAL RESEARCH INST OF INFECTIOUS DISEASES FORT DETRICK MD

The full text of this report is available for sale.

Relative Retention Time Library for Selected Hydrocarbons via Glass Capillary Gas Chromatography

FEB 1982

Authors: Paul C. Hayes Jr; AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH

This technical report describes an experimental study of the reliability of a glass capillary gas chromatographic system to assign tentative peak identity according to relative retention times under carefully controlled operating conditions. The first phase of the effort involved the set-up, calibration, and optimization of the capillary system. Optimization was realized with the maximum resolution between selected pairs of hydrocarbons in a minimum of sample analysis time. Peak resolution was ...

Organophosphazenes. 15. Reactions of Hexafluorocyclotriphosphazene with Tert- and n-Butyl Lithium Reagents

04 DEC 1981

26 pages

Authors: Kolikkara Ramachandran; Christopher W. Allen; VERMONT UNIV BURLINGTON DEPT OF CHEMISTRY

The reactions of tert- and n-butyl lithium reagents with hexafluorocvclotriphosphazene (N3P3F6) have been examined. In contrast to the behavior of n-butyl lithium. The reaction of t-butyl lithium with N3P3F6 gives good yields of N3P3F5C4H9. While the n-butyl lithium reaction follows a geminal pathway at the stage of disubstitution, the t-butyl lithium reaction gives exclusively the trans non-geminal isomer for the compounds N3P3F6-n (t-C4H9)n(n = 2,3). This is the first example ...

Effect of Flame Temperature and Fuel Composition on Sooting Tendency in a Research Combustor

DEC 1981

Authors: D. W. Naegeli; L. G. Dodge; C. A. Moses; SOUTHWEST RESEARCH INST SAN ANTONIO TX ARMY FUELS AND LUBRICANTS RESEARCH LAB

Several fuel blends containing alkyl benzenes, methyl naphthalenes, tetralin and Indene were prepared with hydrogen contents ranging from 11.5 to 14.2 percent. The effects of burner inlet conditions on the sooting tendency of the test fuels were measured in a Phillips 2-inch diameter cylindrical combustor capable of inlet pressures and temperatures up to 1.6 MPa and 1030K, respectively. Both flame radiation and opacity measurements were used to determine the soot ...

Method for Reducing the Adhesion of Ice to the Walls of Navigation Locks.

17 NOV 1981

Authors: H. H. G. Jellinek; G. E. Frankenstein; B. Hanamoto; DEPARTMENT OF THE ARMY WASHINGTON DC

This invention relates to a methods of treating surfaces exposed to icing conditions to reduce the bond strength of ice and facilitate its removal from such surfaces. In accordance with this invention, a method is provided for reducing adhesion of ice to a surface comprising coating the surface with a co-polymer of a polycarbonate and dimethylsiloxane. In the preferred method, this co-polymer is mixed with silicon oil. Laboratory tests have ...

Selective Reductions. 28. The Fast Reaction of Lithium Aluminum Hydride with Alkyl Halides in Tetrahydrofuran. A Reappraisal of the Scope of the Reaction

25 AUG 1981

Authors: S. Krishnamurthy; Herbert C. Brown; PURDUE UNIV LAFAYETTE IND RICHARD B WETHERILL LAB

Synthesis of New 1-Halo-1-Alkyltetrachlorocyclotri-phosphazenes, Including the First Cyclo-Phosphazenes with a Direct P-I Bond

20 AUG 1981

Authors: Harry R. Allcock; Paul J. Harris; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CHEMISTRY

The synthesis of the first series of 1-halo- alkyltetrachlorocyclotriphosphazenes halogen X = C1 (III), X = Br (IV), X = I (V) are described, together with the structural characterization of these compounds. Compounds of type III ;are polymer precursors. Species of type V are the first examples of phosphazenes with a phosphorus-iodine bond. Surprisingly, the substitution reactions of these compounds with organic nucleophiles take place at a position geminal to ...

The Effects of Organosulfur Compounds upon the Storage Stability of Jet A Fuel

14 AUG 1981

87 pages

Authors: Frederick C. Heneman; ARMY MILITARY PERSONNEL CENTER ALEXANDRIA VA

tohis study examined the effect of sulfur-containing compounds on the storage stability of Jet A turbine fuel. It was found that alkyl sulfides and disulfides increased the fuel's stability while all thiols and thiophene derivatives tested decreased fuel stability (increased deposit formation) at temperatures and sulfur concentrations selected. Linear Arrhenius plots of sulfur-spiked fuel samples demonstrated that deposit formation decreased with increased slope for all alkyl sulfides, alkyl disulfides, thiols, ...

Studies of Silicon-Nitrogen-Phosphorus Compounds Including a New Synthesis of Phosphazenes

11 AUG 1981

Authors: Robert H. Neilson; Patty Wisian-Neilson; TEXAS CHRISTIAN UNIV FORT WORTH DEPT OF CHEMISTRY

This program of research has been directed toward the development of new synthesis of polyphosphazenes, particularly those with alkyl and/or aryl substituents, via the elimination of substituted silanes from N- silylphosphinimines. The synthesis and characterization of both the new polymers and their precursors has been investigated. (Author)

Gas-Phase Reactions of Certain Nucleophiles with Alkyl Trifluoroacetates. A New Probe to Distinguish between S sub N 2 and E2 Mechanisms for Alkyl Derivatives

06 JUL 1981

Authors: Richard N. McDonald; A. Kasem Chowdhury; KANSAS STATE UNIV MANHATTAN DEPT OF CHEMISTRY

Addition Compounds of Alkali-Metal Hydrides. 21. Rapid Reaction of Dialkyl- and Monoalkylboranes with Lithium Aluminum Hydride in the Presence of Triethylenediamine. A Facile and Quantitative Synthesis of Lithium Dialkyl- and Monoalkylborohydrides

17 JUN 1981

Authors: Herbert C. Brown; Bakthan Singaram; Poonnoose C. Mathew; PURDUE UNIV LAFAYETTE IND RICHARD B WETHERILL LAB

Transition-Metal-Promoted Reactions of Boron Hydrides. 3. (R2C2)Co2(CO) 6-Catalyzed Reactions of Alkynes and Small Carboranes: Synthesis of B- Alkenylcarboranes

15 JUN 1981

Authors: Robert Wilczynski; Larry G. Sneddon; PENNSYLVANIA UNIV PHILADELPHIA

Synthesis and Characterization of Dialkyltin Complexes Containing Sulfur Donor Atoms

14 MAY 1981

Authors: W. M. Coleman III; H. E. Guard; A. B. Cobet; CALIFORNIA UNIV BERKELEY NAVAL BIOSCIENCES LAB

Gas-Phase Reactions of Negative Ions with Alkyl Nitrites

29 APR 1981

Authors: Gary K. King; M. Matti Maricq; Veronica M. Bierbaum; Charles H. DePuy; COLORADO UNIV AT BOULDER DEPT OF CHEMISTRY

The Crystal and Molecular Structure of the Sulfamide (t-BuNH)2SO2.

08 APR 1981

Authors: J. L. Atwood; a. H. Cowley; W. E. Hunter; S. K. Mehrotra; TEXAS UNIV AT AUSTIN DEPT OF CHEMISTRY

The molecular structure of (t-BuNH)2SO2 has been determined by single-crystal X-ray diffraction methods. The compound crystallizes in the monoclinic system, space group P2 sub 1/c, with a = 9.720(4), b = 9.887(4), c = 12.076(6) A, beta = 90.46(4) deg, and Z = 4. The symmetry of (t-BuNH)2SO2 is C sub 2, and the t-Bu groups have a distal relationship with respect to each other. (Author)

Time-Resolved Infrared Study of Bimolecular Reactions between Tert-Butyl Radicals

09 MAR 1981

Authors: R. M. Plecenik; D. S. Bethune; J. R. Lankard; Ph. Avouris; P. P. Sorokin; IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY

Transition-Metal-Promoted Reactions of Boron Hydrides. 2. Synthesis and Thermolysis Reactions of Alkenylpentaboranes. A New Synthesis of Monocarbon Carboranes

19 FEB 1981

Authors: Robert Wilczynski; Larry G. Sneddon; PENNSYLVANIA UNIV PHILADELPHIA

Reactions of Metal-Metal Multiple Bonds. 8. Forming Mo-Mo Quadruple Bonds by Reductive Elimination (Alkyl Group Disproportionation) in the Reactions of 1,2-Mo2R2(NMe2)4 Compounds (M triple bond M) with Carbon Dioxide and 1,3-Diaryltriazenes.

30 JAN 1981

Authors: M. H. Chisholm; K. Folting; D. A. Haitko; J. C. Huffman; INDIANA UNIV AT BLOOMINGTON DEPT OF CHEMISTRY

Addition of either CO2 or 1,3-diaryltriazines to 1,2-Mo2R2(NMe2)4 compounds promotes reductive elimination from the dimetal center by alkyl group disproportionation with a concomittant metal-metal bond order change from three to four when R = an alkyl group having beta-hydrogen atoms. Both reactions proceed through intermediates of the form 1,2-Mo2R2(NMe2)2(chelate)2. The elimination of alkane and alkene is intramolecular and has a formal analogy with that found in mononuclear chemistry, namely beta-hydrogen ...

Unsymmetrical Polynitrocarbonates and Symmetrical 1, 3-Bis (Halo-and Nitroalkyl Carbonyldioxy)-2, 2-Dinitropropanes and Methods of Preparation.

13 JAN 1981

Authors: William H. Gilligan; Scott L. Stafford; DEPARTMENT OF THE ARMY WASHINGTON DC

An object of this invention is to provide new organic compounds. Another object of this invention is to provide new explosive materials. A further object of this invention is to provide unsymmetrical polynitrocarbonates. Still another object is to provide a method of synthesizing unsymmetrical polynitrocarbonates. Yet a further object of this invention is to provide novel symmetrical 1,3-bis(halo- and nitroalkyl carbonyldioxy)-2,2-dinitropropanes. Still a further object of this invention is to ...

Dialkylimidazolium Chlorides

JAN 1981

21 pages

Authors: John S. Wilkes; Joseph A. Levisky; FRANK J SEILER RESEARCH LAB UNITED STATES AIR FORCE ACADEMY CO

The iodide salts of the 1,3-alkylated imidazoles are readily prepared by quaternization of the nucleophilic nitrogen of N-substituted imidazoles with alkyl iodides. Direct alkylation by the appropriate chloroalkanes proved to be more successful. In some cases the product was obtained in high yield and was quite pure, even without recrystallation. The procedure for reactions using chloromethane or chloroethane (both gases) consisted of heating the homogeneous mixture of 1-alkylimidazole and chloroalkane ...

Thermodynamics of Organic Compounds

1981

24 pages

Authors: N. K. Smith; B. E. Gammon; William D. Good; DEPARTMENT OF ENERGY BARTLESVILLE OK BARTLESVILLE ENERGY TECHNOLOGY CENTER

The research effort continues to be focussed on high density/high energy hydrocarbons. In cooperation with researchers at Wright-Patterson Air Force Base, heats of combustion are measured for constituents of current ramjet fuels and for finished fuels; meanwhile, pure hydrocarbons are synthesized for heat-of-combustion measurement whose unusual steric or strain energies may contribute to design of high energy/high density fuels of the future. Four pure hydrocarbons studied were selected among the ...

Synthesis of Poly(dialkylphosphazenes) from N-Silylphosphinimines

1981

Authors: Robert H. Neilson; Patty Wisian-Neilson; TEXAS CHRISTIAN UNIV FORT WORTH DEPT OF CHEMISTRY

F-Phenylalkylene Oxide Diacetylenes

23 DEC 1980

Authors: Keith B. Baucom; DEPARTMENT OF THE AIR FORCE WASHINGTON DC

F-phenylalkylene oxide acetylenes having the formula C6F5C=C(CF2OCF2)nC=CC6F5, where n ranges from 3 to 8, inclusive. The diacetylenes are useful as monomers for preparing fluorinated polyether elastomers. (Author)

Improved Method of Preparing N, N-Bis(2-Fluoro-2,2-Dinitroethyl) Carbamyl Chloride and Its Derivatives.

28 NOV 1980

Authors: W. H. Gilligan; Michael E. Stizmann; DEPARTMENT OF THE NAVY WASHINGTON DC

This invention relates to organic explosives and more particularly to fluoronitroorganic explosives. An object is to provide an improved method of producing N,N-bis(2-fluoro-2,2-dinitroethyl) carbamyl chloride. Another object of this invention is to provide a method of obtaining pure N,N-bis(2-fluoro-2,2-dinitroethyl) carbamyl chloride. A further object of this invention is to provide new, more powerful explosive compounds having good thermal and chemical stabilities. Yet another object of this invention is to provide ...

Study of Chemical Toxicity of Low-Level Wastes. Monographs. Volume 2

NOV 80

Authors: GENERAL RESEARCH CORP SANTA BARBARA CA

The methodologies by which compounds, identified as possible constituents of low-level waste burial sites, were selected for toxicological review and organized into broad classes, are discussed in section 1.1 of this volume. Online computerized data bases as well as a core collection of toxicology and chemical reference manuals and handbooks (section 1.2) were utilized. To reduce the extensive list of potential low-level waste burial site constituents, only those reported by ...

Search for Radioprotective Compounds. Part XVIII. Synthesis and Protective Activity of a Series of S-Omega(Omega-(Omega-Aminoalkylamino) Alkylamino) Alkylphosphorothioic Acids and Disulphides,

OCT 1980

Authors: G. A. Grant; W. Sowa; B. A. Licht; K. Leach; DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

The synthesis of the polyamines phosphorothioic acids NH2(CH2)n''NH(CH2)n'NH(CH2)nSPO3H were achieved where n = 2 and 3, n' = 2, 3, 4 and 5; n'' = 2, 3, 4. The toxicities and radiation dose reduction factors (DRF) were determined in mice. The compounds were given intraperitoneally before irradiation. The mice were irradiated with Cs134 gamma radiation source at dose rate of approximately 90 r/min. The best DRF (1.8) was obtained for ...

Poly(Difluorophosphazene): A New Intermediate for the Synthesis of Poly(Organophosphazenes).

22 SEP 1980

Authors: T. L. Evans; H. R. Allcock; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CHEMISTRY

This is a review of the use of poly(difluorophosphazene) as a reactive intermediate for nucleophilic substitution reactions designed to replace the fluorine atoms by alkoxy-, aryloxy-, amino-, alkyl-, or aryl- side groups. The properties of the organophosphazene products are summarized. (Author)

Batch Processing with the Radioiodine Laser Induced-Fluorescence Detector.

27 AUG 1980

Authors: J. R. McDonald; A. P. Baronavski; NAVAL RESEARCH LAB WASHINGTON DC

Methods for conversion of alkyl Iodides and HI to I2 have been quantitatively evaluated for use in batch processing. Scrubbing properties of silver zeolites in terms of their affinity for I2 and NO2 and chemical and thermal desorption curves have been studies and evaluated for use in batch processing. (Author)

Synthesis of Energetic Polymers.

15 AUG 1980

Authors: J. M. Guimont; G. E. Manser; D. L. Ross; SRI INTERNATIONAL MENLO PARK CA

During this first year of the program, three general synthetic routes to the preparation of energetic oxetanes and tetrahydrofurans were investigated. Efforts to develop a general synthetic route to 3-nitroalkly-substituted oxetanes starting with methylene malonate were not successful. However, one specific oxetane monomer was prepared to provide an immediate subject for polymerization studies. (Author)

Diphospha-S-Triazines.

29 JUL 1980

Authors: Kazimiera J. L. Paciorek; Reinhold H. Kratzer; Jacquelyn Kaufman; Thomas I. Ito; James H. Nakahara; DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Diphospha-s-triazines wherein the two phosphorus atoms are substituted by aromatic groups and the carbon atom is substituted by either a perfluoroalkyl or a perfluoroalkylether moiety. The triazines exhibit a broad range of properties and are useful as antioxidant-anticorrosion agents, lubricants, and hydraulic fluids. (Author)

Preparation of 1,3,5,7 Tetracetamido - and 1,3,5,7 -Tetraaminodamantanes.

10 JUL 1980

Authors: Gilbert P. Sollott; DEPARTMENT OF THE ARMY WASHINGTON DC

1,3,5,7 - Tetraacetamidoadamantane is prepared by reacting 1,3,5,7 - tetraiodoadamantane with acetonitrile and water in the presence of actinic radiation. The 1,3,5,7 - tetraacetamidoadamantane can be hydrolyzed with hydrochloric acid to produce 1,3,5,7 - tetraaminoadamantane tetrahydrochloride, which can be converted to the free base by treatment with an equivalent amount of an alkali, e.g. aqueous sodium hydroxide. (Author)

Fluoroalkyl-Substituted Siloxanes as Liquid Repellent Fabric Finishes

16 JUN 1980

Authors: John W. Bovenkamp; Benoit V. Lacroix; DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

Predicted Performance of Energetic Plasticizer Formulations.

JUN 1980

Authors: Larry P. Davis; Robert A. Hildreth; Melvin L. Druelinger; FRANK J SEILER RESEARCH LAB UNITED STATES AIR FORCE ACADEMY CO

Calculations of heats of formation (MNDO) and specific impulse for a series of bis-fluorodinitroethyl alkyl ethers have been made. This series also included oxygen and sulfur hetero atoms, N-H, N-NO2 and CFNO2 substituents. These calculations reveal a trend toward decreasing Isp values as the hydrocarbon chain increases. The results suggest that ideal target molecules for synthetic efforts are the smaller members of this family of compounds, and that such compounds ...

Reaction of (Ir(cyclo-octa-1,5-diene)(P(p-tolyl)3)2) (nido-7,8-C2B9H12) with Hydrogen; Synthesis and X-Ray Structure of 3,9-((H)2(P(p-tolyl)3)2Ir)-3,9-Micro-(H)2-7,8-C2B9H10.

12 MAY 1980

Authors: James A. Doi; Raymond G. Teller; M. Frederick Hawthorne; CALIFORNIA UNIV LOS ANGELES DEPT OF CHEMISTRY

This report deals with the treatment of the ion pair (IR(COD)(PR3)2) (NIDO-7.8-C2B9H12) with hydrogen and their Nido-metallocarborane products.

The Molecular Structure and Behavior of Phosphazenes.

23 APR 1980

Authors: Richard H. Boyd; UTAH UNIV SALT LAKE CITY DEPT OF MATERIALS SCIENCE AND ENGINEERING

Calculations of barriers associated with crankshaft motions in polyphosphazenes were made. To properly handle polar bonds in conformational energy calculations a new method was worked out that removes difficulties previously associated with polarity. Parameters were worked out for alkyl halides and the method was tested on them and found to be successful. It was also applied to the polar polymers polyvinylchloride and polyvinylidenechloride successfully. Dielectric measurements were made on poly ...

Chlorofluorination of Nitriles. Preparation of N-Chloro-N-Fluoroalkylamines,

28 MAR 1980

Authors: Akira Sekiya; Darryl D. Desmarteau; KANSAS STATE UNIV MANHATTAN DEPT OF CHEMISTRY

Copolymers of Alpha-N-Alkylsytrenes and Styrene.

25 MAR 1980

Authors: Helen E. Mertwoy; Henry Gisser; DEPARTMENT OF THE ARMY WASHINGTON DC

There is described novel copolymers of styrene and alpha-n-alkylstyrenes containing at least eleven carbon atoms in the alkyl group. The copolymers, which contain at least 20 mole percent of the alpha-n-alkylstyrenes, are solids and have greater durability with lower coefficients of friction than comparable styrene homopolymers. The copolymers are produced by anionic initiated copolymerization using metallic sodium as the catalyst or by radical initiated copolymerization using benzoyl peroxide or azobisisobutyronitrile ...

Difluoromethylene Chain-Extension Reactions. Preparation of Fluorinated Alkenes and Alkadienes from Olefin Precursors,

14 JAN 1980

Authors: Donald J. Burton; Yoshio Inouye; James A. Headley; IOWA UNIV IOWA CITY DEPT OF CHEMISTRY

Dialkylimidazolium Chloroaluminate Molten Salts

1980

Authors: J. S. Wilkes; J. A. Levisky; M. L. Druelinger; FRANK J SEILER RESEARCH LAB UNITED STATES AIR FORCE ACADEMY CO

Earlier work has shown that mixtures of l-alkylpyridinium chlorides and aluminum chloride form electrolytes that are molten at room temperature. Molecular orbital calculations predicted that 1,3-dialkylimdazolium cations would be more stable cathodically than l-alkylpyridinium cations. A series of l- methyl-3-alkylimidazolium chlorides was synthesized and chloroaluminate melts were prepared from them. The imidazolium chlorides themselves have reduction potentials considerably cathodic of the corresponding pyridinium chlorides in DMF. The new melts have ...

1H and 13C Fourier Transform NMR Characterization of Jet Fuels Derived from Alternate Energy Sources.

1980

Authors: H. C. Dorn; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG

This report discusses LC-superscript 1H NMR studies from semi-preparative to analytical column size in order to establish ultimate chromatographic resolution conditions. It explores quantitative approaches for LC-superscript 1H NMR including a dual effluent stream to allow introduction of a quantitative reference before the superscript 1H NMR detector. It explores quantitative and ultimate sensitivity limits for the present superscript 1H NMR LC detector including optimization of superscript 1H NMR insert for ...

Comparative Study of the Acute Toxicity of a Homologous Series of Trialkyltins to Larval Shore Crabs, Hemigrapsus nudus, and Lobster, Homarus americanus,

1980

Authors: Roy B. Laughlin Jr; Willie J. French; CALIFORNIA UNIV OAKLAND NAVAL BIOSCIENCES LAB

Tables of Molecular Vibrational Frequencies. Part 10,

1980

Authors: Takehiko Shimanouchi; Hiroatsu Matsuura; Yoshiki Ogawa; Issei Harada; NATIONAL STANDARD REFERENCE DATA SYSTEM

Fundamental vibrational frequencies of 94 molecular forms of 23 polyatomic chain molecules of halogenoalkanes and halogenoalkyl ethers consisting of the CH3, CH2, O, F, Cl, Br, and I groups are given as an extension of tables of molecular vibrational frequencies published in the NSRDS-NBS publication series and in this journal. On preparing the tables in this part an approach based on the calculations of normal vibration frequencies was adopted. A ...

Grease Compositions.

04 DEC 1979

18 pages

Authors: John B. Christian; DEPARTMENT OF THE AIR FORCE WASHINGTON DC

This invention relates to grease compositions containing additives which inhibit rust and corrosion in high humidity and high temperature environments. More specifically, the present invention is concerned with a grease composition comprising (1) a major amount of a polyfluoroalkylether base fluid, (2) a minor amount of a thickener for the base fluid, and (3) a rust and corrosion inhibiting amount of a benzimidazole.

The Crystal and Molecular Structure 1-Hydrido-1-iso-Propyl-Tetrachlorocyclotriphosphazene.

29 NOV 1979

Authors: Robert J. Ritchie ; Paul J. Harris ; Harry R. Allcock; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CHEMISTRY

The first structural determination is described of a cyclic phosphazene, N3P3Cl4(i-Pr)H, which contains both a hydrogen atom and an alkyl group as substituents attached to phosphorus. This compound contains a planar phosphazene ring with a curious alternation of P-N bond lengths at progressively greater distances from the P(i-Pr)H unit and with corresponding distortion in the bond angles within the ring. (Author)

Small-Molecule Cyclic Models for the Synthesis of New Polyphosphazenes: Side Group Construction via Lithiophenoxy Derivatives.

29 NOV 1979

Authors: H. R. Allcock ; T. L. Evans ; T. J. Fuller; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CHEMISTRY

Hexa(p-lithiophenoxycyclotriphosphazene) has been synthesized as an intermediate for the covalent attachment of metallo-, phosphino, carboxylato, alkyl, or tertiary alcohol units to the side group structure. These reactions are models for the preparation of the corresponding phosphazene high polymers.

Preparation of Alpha, Omega-Diiodoperfluoro Alkanes.

01 OCT 1979

Authors: Clifford D. Bedford ; Kurt Baum; FLUOROCHEM INC AZUSA CALIF

Reaction conditions for the preparation of alpha, omega-diiodoperfluoro-alkanes from iodine and tetrafluoroethylene were studied. A laboratory method was developed for the preparation of multigram quantities of alpha, omega diiodoperfluoroalkanes. Similar results were observed using iodine and 1,2-diiodoperfluoroethane. A high conversion of 1,4-diiodoperfluorobutane to higher telomers was obtained. (Author)

Nitrous Acid as an Oxidant in Acidic Media.

25 SEP 1979

21 pages

Authors: David S. Ross ; Georgina P. Hum; SRI INTERNATIONAL MENLO PARK CA

It has been found that benzyl and aliphatic alcohols are rapidly oxidized by nitrous acid to the corresponding carbonyl compound at 25 degrees C in 50-70% sulfuric acid. The oxidations are very rapid, complete within minutes for most substrates; the process appears to be quantitative, at least in runs with alcohol concentrations in the 10 to the -14 M range. For the benzyl alcohols, an electron withdrawing para-substituent, such as ...

Mono-Substituted Phthalonitriles and Phthalocyanines.

24 SEP 1979

Authors: Teddy M. Keller; James R. Griffith; DEPARTMENT OF THE NAVY WASHINGTON DC

Iodophthalonitrile is prepared by mixing aminophthalonitrile with sulfuric acid at a temperature below 25 C, reacting that product with sodium nitrite at a temperature below 15 C, and reacting that product with potassium iodide at a temperature below 20 C. A fluoroalkyl phthalonitrile is prepared by mixing fluoroalkyl iodide, activated copper, iodophthalonitrile, and a solvent under an inert atmosphere at a temperature from 110 C to 125 C at least ...

The Preparation of Some Novel Electrolytes: Synthesis of Partially Fluorinated Alkanesulfonic Acids as Potential Fuel Cell Electrolytes.

SEP 1979

Authors: C. Bunyagidj ; H. Pietrowska ; M. H. Aldridge; AMERICAN UNIV WASHINGTON DC

The objective of this research was to prepare some strong acids for evaluation by Fort Belvoir as potential fuel cell electrolytes. The major acid, other than phosphoric, H3PO4, currently under investigation by Fort Belvoir as a fuel cell electrolyte is TFMSA, CF3SO3H.H2O, trifluoromethanesulfonic acid monohydrate aqueous solutions and sodium salt mixtures. TFMSA has been found to be superior to H3PO4 from the standpoint of electrode kinetics, but certain undesirable characteristics ...