Bis-π-cyclopentadienyltungsten(IV) (bis-μ-benzenethiolato)metal(0) tetracarbonyls, (π-C5H5)2W(μ-SC6H5)2M(CO)4, M = Cr, Mo, or W

Abstract

The three complexes are monoclinic, B2/b, isomorphous and isostructural: (i) C26CrH200482W, a= 17"85 (3), b=18.23 (3), c=15.83 (3) ~, 7=112.8 (3) ° , D,,=1.87, Dc=1-90 g cm -3, Z=8; (ii) C26H20MoO4S2W, a= 18.07(3), b= 18.33(3), c= 16.23(3) .~, y= 112.6(3) °, D,,= 1.98, De=2"00 g cm -3, Z=8; (iii) C26H2004SEW2, a= 17.90 (3), b= 18-37 (3), c= 15.93(3) .~, 7= 112.3(3) °, D,,=2.26, D¢=2.27 gcm -a, Z= 8. Patterson methods were used to determine the structures from linear diffractometer intensity measurements. Final R 0.075 (Cr), 0.070 (Mo), and 0.090 (W). The positions of all atoms except hydrogen were determined. Deviations from expected values in bond lengths and angles were not significant. The molecules do not have intramolecular metal-metal bonds. In~oducfionCrystals were prepared by Dias & Green (1969

Synthesis and Structure of a Five-Coordinate Organochromium(III) Thiolate Complex from a Chromium(II) Alkyl Precursor

“…After workup, a solid with the empirical formula {CrMe(SPh)[N(SiMe 2 CH 2 PPh 2 ) 2 ]} x ( 2 ) was obtained (eq 1). The chromium(III) thiolate complex 2 was expected to be dinuclear, in part due to the overwhelming preference of chromium(III) to acquire an octahedral geometry 4 and also due to the high propensity of thiolates, in particular phenylthiolates, to bridge metal centers Cp 2 Cr 2 (μ-SPh)(μ 3 -S) 2 FeCp and CpCr(μ-SPh) 3 Fe(μ-SPh) 3 CrCp, and Cp 2 W(μ-SPh)Cr(CO) 4 …”