| Kinetics of Boron Hydride Interconversion Reactions |
SEP 89 |
97 pages |
| Authors:
R. Greatrex; N. N. Greenwood; LEEDS UNIV (ENGLAND)
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 | This report describes progress that has been made during the Grant period in unravelling the complex series of gas-phase reactions that occur during the thermolysis of diborane. This has involved the application of a mass spectrometric technique developed in this laboratory to monitor initial rates of reaction and product distributions, leading to rate equations, orders of reaction, and energies of activation. Boron hydrides, Diborane, Tetraborane, Pentaborane, Hexaborane, Tetraborane, Carbonyl, Borane ... |
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| Kinetics of Boron Hydride Interconversion Reactions |
MAY 88 |
28 pages |
| Authors:
N. N. Greenwood; LEEDS UNIV (UNITED KINGDOM)
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| The mechanisms by which gaseous boron hydrides so readily interconvert and build up into larger clusters has excited considerable academic and industrial interest for several decades. This paper describes recent progress that has been made in unravelling this complex series of interconversion reactions. Initial reaction rates have been studied mass spectrometrically to obtain rate equations, orders of reaction and energies of activation. Detailed and continuous product analysis for H2 and ... |
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| Kinetics and Mechanisms of Thermolytic Interconversions of Boron Hydrides |
JUN 1984 |
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| Authors:
R. Greatrex; N. N. Greenwood; G. A. Jump; LEEDS UNIV (ENGLAND)
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 | A Mass-spectrometric method for following the kinetics of decomposition and interconversion of the boron hydrides in the gas phase has been perfected. All volatile components of the reacting mixture, including H2 can be analyzed quantitatively and continuously. Gaseous hexaborane (10) has been studied by this method for pressure in the range 1-10 mmHg, and at temperatures between 75 and 165 C. Its decomposition is much slower than applied in the ... |
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| COORDINATION CHEMISTRY OF GROUP III. |
JAN 1966 |
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| Authors:
N. N. Greenwood; NEWCASTLE-UPON-TYNE UNIV (ENGLAND) DEPT OF INORGANIC CHEMISTRY
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| A new series of boron-nitrogen heterocyclics of general formula RR'N4BH were synthesized and their ultraviolet, infrared and Raman spectra studied (AD-632 448). Theoretical calculations on the 6-electron pi system were compared with experimental results. Proton n.m.r. spectra of the following selected compounds were obtained: Et20.GaC13, Et20.GaBr3, Et2S.GaC13 and Et2S.GaBr2. When analysed correctly these indicate that GaC13 is a stronger acceptor than GaBr3 towards these ligands and that Et2S is a ... |
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| COORDINATION CHEMISTRY OF GROUP III. |
MAY 1965 |
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| Authors:
N. N. Greenwood; NEWCASTLE-UPON-TYNE UNIV (ENGLAND) DEPT OF INORGANIC CHEMISTRY
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| A summary is given of work involving the coordination chemistry of Group III hydrides and halides, and the thermochemistry of Group III complexes. A list of papers published in conjunction with the work is included. |
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| GALLIUM HYDRIDE ADDUCTS OF TRIMETHYLPHOSPHINE AND TRIPHENYLPHOSPHINE, |
13 MAY 1964 |
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| Authors:
N. N. Greenwood; E. J. F. Ross; A. Storr; NEWCASTLE-UPON-TYNE UNIV (ENGLAND) DEPT OF INORGANIC CHEMISTRY
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| The new compounds Me3PGaH3 and Me3PGaD3 were prepared and shown by their gas-phase infrared spectra to be monomeric. The P-Ga stretching frequency was identified at 326/cm. The absence of a 2:1 adduct, (Me3P)2GaH3, was shown by tensiometric titration at -21C. Gas-phase displacement reactions indicate that trimethylamine and trimethylphosphine have similar donor strengths towards gallium hydride. The corresponding aluminium hydride adduct Me3PAlH3 could not be prepared directly, and trimethylphosphine does not ... |
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| COORDINATION CHEMISTRY OF GROUP III. |
FEB 1964 |
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| Authors:
N. N. Greenwood; NEWCASTLE-UPON-TYNE UNIV (ENGLAND) DEPT OF INORGANIC CHEMISTRY
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| A summary is given of research progress in the following areas: physical and thermochemical properties of some phenyl compounds of Group III elements; thermochemistry of gallium trihalide complexes; spectroscopy of Group III adducts. |
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| THE CHEMISTRY OF BORON. |
FEB 1962 |
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| Authors:
N. N. Greenwood; NOTTINGHAM UNIV (ENGLAND) DEPT OF CHEMISTRY
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| Compounds enriched in B-10 were used to elucidate infra-red spectroscopic assignments of compounds such as potassium tetrafluoroborate. New types of heterocyclic boron compounds were synthesised and their physical and chemical properties compared with those of analogous open chain compounds. The use of such compounds in synthetic organic chemistry was evaluated. (Author) |
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