CRYSTAL AND MOLECULAR-STRUCTURE OF ETHYL-3-[TRIS(TRIMETHYLSILOXANYL)SILYL]PYRROLINIUM HYDROCHLORIDE

The crystal and molecular structure of -ethyl-3-[tris(trimethylsiloxan yl)sily]pyrrolinium hydrochloride (C15H38N+O3Si4 . Cl-) has been deter mined by direct methods. The title compound crystallizes in the monocl inic space group C2/c with a = 20.640(3), b = 19.494(2), c = 27.34(3) Angstrom, beta = 90.60(4)degrees, V = 11000(13) Angstrom(3), Z = 16, D -x = 1.034 Mg m(-3). There are two molecules with different conformati ons in the crystal. The pyrroline rings are non-planar. The Si-O-Si an gles range from 149(1)degrees to 163(1)degrees. Two of the SiMe3 group s are disordered. All molecules are connected by Cl--N+ contacts and C l--Hn(+) hydrogen bonds to form double chains.