Kw. Klinkhammer et J. Weidlein, BIS[TRIS(TRIMETHYLSILYL)SILYL] ZINC, CADM IUM, AND MERCURY - A STRUCTURAL STUDY BY IR AND RAMAN-SPECTROSCOPY AND X-RAY ANALYSES, Zeitschrift fur anorganische und allgemeine Chemie, 622(7), 1996, pp. 1209-1214
Citations number
13
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur anorganische und allgemeine Chemie
Raman and FT-IR spectra of bis [tris(trimethylsilyl)silyl] zinc (1), c
admium (2) and mercury (3) were recorded. The vibrational data are in
agreement with either D-3h or a D-3d symmetry. The latter had been sho
wn to be the correct one at least for the solid state by X-ray diffrac
tion experiments. All three compounds crystallize isomorphically in th
e triclinic centrosymmetric space group P1. [2 (T = 293 K): a = 9.4388
(11); b = 9.744(2); c = 12.926(2); alpha = 68.200(12); beta = 71.971(1
0); gamma = 60.925(10); Z = 1; (T = 173 K): a = 9.336(6); b = 9.585(5)
; c = 12.488(8); alpha = 68.77(4); beta = 72.28(4); gamma = 62.06(4);
3: a = 9.467(2); b = 9.749(2); c = 12.885(2); alpha = 67.840(14); beta
= 71.510(14); gamma = 60.890(14); Z = 1]. The Hg-Si bondlength in 3 w
as found to be 246.9(2) pm, somewhat shorter then in all disilylmercur
y derivatives investigated so far and even shorter than the Cd-Si bond
in 2 (250.4(1)pm). Bondlengths and angles within the tris(trimethylsi
lyl)silyl group are virtually equal in all three group 12 derivatives
and lie in the expected range.