Synthesis and Characterization of Neopentylindium Compounds: X-ray Crystal Structures of [(Me3CCH2)2InAs(SiMe3)2]2 and (Me3CCH2)2InAs(SiMe3)2In(CH2CMe3)2Cl

The 1:1 and 2:1 mole ratio reactions of (Me3CCH2)2InCl with As(SiMe3)3 yield the dimeric and mixed-bridging compounds [(Me3CCH2)2InAs(SiMe3)2]2 (1) and (Me3CCH2)2InAs(SiMe3)2-In(CH2CMe3)2Cl (2), respectively. 1 and 2 were characterized by melting point, ¹H and ¹³C NMR spectra, partial elemental analyses (C and H), and single-crystal X-ray analyses. Dimer 1 crystallizes in the monoclinic system, space group C2/m (C2h³), with a = 19.789(2) Å, b = 12.878(1) Å, c = 12.282(1)Å, β = 127.49(1)°, V=2484(1) ų, and Z = 2. Crystals of 2 belong to the monoclinic system, space group C2/c (C2h⁶), with a = 20.191(2) Å, b = 9.967(1) Å, c = 19.758(2) Å, β= 99.67(1)°, V = 3920(1) ų, and Z = 4. The facile interconversions of 1 and 2 are reported. © 1994, American Chemical Society. All rights reserved.

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Author Andrew T. McPhail Chemistry