SYNTHESIS AND CHARACTERIZATION OF NEOPENTYLINDIUM COMPOUNDS - X-RAY CRYSTAL-STRUCTURES OF [(ME(3)CCH(2))(2)INAS(SIME(3))(2)](2) AND E(3)CCH(2))(2)INAS(SIME(3))(2)IN(CH(2)CME(3))(2)CL

The 1:1 and 2:1 mole ratio reactions of(Me(3)CCH(2))(2)InCl with As(Si Me(3))(3) yield the dimeric and mixed-bridging compounds [(Me(3)CCH(2) )(2)InAs(SiMe(3))(2)](2) (1) and e(3)CCH(2))(2)InAs(SiMe(3))(2)In(CH(2 )CMe(3))(2)Cl (2), respectively. 1 and 2 were characterized by melting point, H-1 and C-13 NMR spectra, partial elemental analyses (C and H) , and single-crystal X-ray analyses. Dimer 1 crystallizes in the monoc linic system, space group C2/m (C(2)h(3)), with a 19.789(2) Angstrom, b = 12.878(1) Angstrom, c 12.282(1) Angstrom, beta = 127.49(1)degrees, V = 2484(1) Angstrom(3), and Z = 2. Crystals of 2 belong to the monoc linic system, space group C2/c (C-2h(6)), With a = 20.191(2) Angstrom, b = 9.967(1) Angstrom, C = 19.758(2) Angstrom, beta = 99.67(1)degrees , V = 3920(1) Angstrom(3), and Z = 4. The facile interconversions of 1 and 2 are reported.