Eugenii A. Chernyshev

Two isostructural carboranes: 3-phenyl-1,2-dicarba-closo-dodecaborane(12) and 1-phenyl-1,7-dicarba-closo-dodecaborane(12)

Two phenyl-substituted carboranes, 3-phenyl-1,2-dicarba-closo-dodecaborane(12), C8H16B10, (I), and 1-phenyl-1,7-dicarba-closo-dodecaborane(12), C8H16B10, (II), were found to be isostructural. Comparison of the bond angles at the ipso-C atoms of the phenyl substituent for (I) and (II) [117.71 (3) and 118.45 (10) degrees, respectively] indicates that electron donation of the carborane cage for B- and C-substituted carboranes is different.

The crystal and molecular structures of three germatrane derivatives

Abstract The molecular and crystal structure of three germatrane compounds: 1-(1-bromobicyclo[4.1.0]hept-7-yl)germatrane, l-(1-trimethylsilanyl-cyclopropyl)-germatrane and 1-(1-Methyl-1,2-dicarba- closo -dodecaboranyl)germatrane has been determined by X-ray diffraction method in order to investigate main geometrical regularities of the germatrane molecules. There were established all values of the main structural parameters above-mentioned molecules.

2‐Methyl‐1‐propenyl‐1,2‐dicarba‐closo‐dodecaborane(12)

The title compound, C6H18B10, is the first X-ray investigated carborane with a propenyl substituent. The C—C bond length in the carborane cage is 1.688 (2) A.

Synthesis and the structure of tribromo(7-bromobicyclo[4.1.0]hept-7-yl)germane

A general procedure was developed for the synthesis of halocyclopropylgermanes. This procedure was used for the preparation of tribromo(7-bromobicyclo[4.1.0]hept-7-yl)germane. The molecular structure was established by GLC-mass spectrometry, 1H NMR spectroscopy, and X-ray diffraction analysis.