Accession Number : AD0708414

Title :   THE PREPARATION OF THE PENTAGONAL PYRAMIDAL CARBORANE, 2,3,4,5-C4B2H6.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA STATE COLL LOS ANGELES DEPT OF CHEMISTRY

Personal Author(s) : Onak,Thomas ; Wong,George T. F.

Report Date : JUN 1970

Pagination or Media Count : 8

Abstract : The pentagonal pyramidal carborane, 2,3,4,5,-C4B2H6, was prepared from 1,2-tetramethylenediborane(6). The conversion was accomplished at 550C using a high-vacuum system which permits a rapid flow of reactant through the hot zone at low pressures. The evidence used to establish the formula and structure of 2,3,4,5,-tetracarba-nido-hexaborane(6) include (a) a mass spectrum cutoff at m/e = 76, (b) two doublets of equal area in the 11B nmr, (c) two singlets and two quartets in the 1H nmr which can be assigned to the two C-H and two kinds of B-H groups, respectively, and (d) the presence of C-H and B-H stretching frequencies in the infrared and the absence of B-H-B bridge frequencies. (Author)

Descriptors :   (*BORON COMPOUNDS, SYNTHESIS(CHEMISTRY)), (*DIBORANES, CHEMICAL REACTIONS), NUCLEAR MAGNETIC RESONANCE, MASS SPECTROSCOPY, INFRARED SPECTRA

Subject Categories : Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE