Accession Number : AD0712733

Title :   BORON HYDRIDE CHEMISTRY.

Descriptive Note : Final rept.,

Corporate Author : GENEVA COLL BEAVER FALLS PA*

Personal Author(s) : Adams,Roy M. ; South,R. L. ; Wilson,D. B. ; Wyma,R. J. ; Beres,John

Report Date : AUG 1970

Pagination or Media Count : 85

Abstract : Attempts to prepare icosahedral closed cage compounds of high boron content with nitrogen, phosphorus or carbon as a hetero atoms were unsuccessful. Electrolysis of the B3H8(-) and B11H14(-) ions in acetonitrile did not produce high boron content materials. Oxidation potential for the B3H8 ion were observed at +0.15 volts at pH 4.5 and at +0.205 volts at pH 12 and at +0.86 volts in acetronitrile. The hydrolysis kinetics led to observation of an unidentified intermediate with reduction potential -0.49 volts. Oxidation potentials of the B11H14(-) ion were +1.56 volts in acetonitrile and +0.70 volts in dimethylformamide. The boranes of dimethylsulfide, ethylene sulfide, trimethylene sulfide, tetrahydrothiophene, and dithiane (C2H4S)2 were prepared. Trithiane (CH2S)3 did not absorb borane at all. The ethylene sulfide and trimethylene sulfide-boranes polymerized. The utility of dimethyl sulfide-borane as a borane carrier was demonstrated with amines, phosphines and phosphites and also its reducing power toward organic groups. The infrared and Raman spectra of enriched and deuterated dimethyl sulfide-borane were taken and assignments made. It was used to prepare 3-methylthioborane, unique in being a stable distillable monoalkyl-borane with retained hydridic activity. Several unreported heterocyclic boron compounds were prepared including oxaborolanes, oxaborinanes, a thiaazaborolane, a diazaborolane, and a thiazaborolane. (Author)

Descriptors :   (*BOROHYDRIDES, SYNTHESIS(CHEMISTRY)), (*BORANES, SYNTHESIS(CHEMISTRY)), (*BORATES, SYNTHESIS(CHEMISTRY)), ELECTROCHEMISTRY, IONS, COMPLEX COMPOUNDS, NUCLEAR MAGNETIC RESONANCE, ORGANIC SULFUR COMPOUNDS

Subject Categories : Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE