Open AccessA silicon‐bridged bis(substituted Cp) yttrium complex
Author(s) -
Marsh R. E.,
Schaefer W. P.,
Coughlin E. B.,
Bercaw J. E.
Publication year - 1992
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
eISSN - 1600-5759
pISSN - 0108-2701
DOI - 10.1107/s0108270192001987
Subject(s) - cyclopentadienyl complex , tetrahydrofuran , triclinic crystal system , chemistry , crystallography , molecule , lithium (medication) , trimethylsilyl , ligand (biochemistry) , atom (system on chip) , crystal structure , stereochemistry , yttrium , ion , medicinal chemistry , catalysis , medicine , biochemistry , receptor , organic chemistry , solvent , computer science , embedded system , endocrinology , oxide
rac-Bis(tetrahydrofuran)lithium [bis(2-trimethylsilyl-4-tert-butyl-eta5-cyclopentadienyl)di-methylsilane]dichloroyttrate, [Li(C4H8O)2][Y(C26H48Si3)Cl2], M(r) = 755.87, triclinic, P1BAR, a = 13.110 (8), b = 17.163 (15), c = 20.623 (14) angstrom, alpha = 104.02 (7), beta = 99.38 (5), gamma = 100.24 (6)-degrees, V = 4326 (6) angstrom3, Z = 4, D(x) = 1. 16 g cm-3 , lambda(Mo Kalpha) = 0.71073 angstrom, mu = 15.86 cm-1, F(000) = 1608, room temperature, R = 0.056 for 6136 reflections with F-0(2) > 3sigma(F-0(2)) . There are two virtually identical molecules in the asymmetric unit. In each, the Y atom is tetrahedrally coordinated to a substituted Si-bridged bis(cyclopentadienyl) ligand and to two Cl ions in the cleft. The Li atom is 2.35 angstrom from each Cl ion, and two molecules of tetrahydrofuran are connected to the Li, completing its tetrahedral coordination.