Electron diffraction study of 1,10-dicarbaclosodecaborane(10)

The structure of the 1,10-C2B8H10 molecule was determined by the electron diffraction method. The following geometric parameters were obtained for the D4d symmetry model: B-C = 1.60(1) A; B-B (basal) = 1.87(1) A; B-B (equatorial) = 1.80(1) A; B-H = 1.17(3) A and the C-B-H angle = 13(5.7)°. These data are in good agreement with the structure of the B10H102− ion or of the less symmetrical 1,6-C2(CH3)2B8H8 isomer.