Two synthetic routes to nanocrystalline III-V (13-15) materials are discussed. The first employs dehalosilylation reactions between Group III trihalides and E(SiMe3)3 (E = P, As) in hydrocarbon solvents affording nanocrystalline III-V semiconductors or their precursors. The second involves reactions of MX3 (M = Ga, X = Cl, I; M = In, X = Cl, I) in glymes with in situ synthesized (Na/K)3E (E = P, As, Sb) in aromatic solvents, ...