85318-46-3Relevant academic research and scientific papers
Reactions of (phosphine)palladium(0) complexes with thiocarbonyl selenide and the x-ray crystal structure of [1,2-C6H4(CH2PPh2) 2]Pd(η2-CSSe)
Werner,Ebner,Bertleff,Schubert
, p. 891 - 895 (2008/10/08)
The reactions of Pd(P-i-Pr3)n (n = 2 or 3) and Pd(PPh3)4 with CSSe yield the compounds (PR3)2Pd-(η2-CSSe) (1,2) for which a η2-bonding mode via C and Se is indicated by infrared data. (PPh3)2Pd(η2-CSSe) (2) reacts with the diphosphines 1,2-C2H4(PPh2)2 (diphos) and 1,2-C6H4(CH2PPh2)2 (dpmb) by displacement of the PPh3 ligands to form the chelate complexes (diphos)Pd(η2-CSSe) (3) and (dpmb)Pd(η2-CSSe) (4). From 2 and 1,2-C6H4(Ph2)2 (dppb), the compound Pd(dppb)2 (5) is obtained. The molecular structure of 4 has been determined by X-ray investigation. 4 crystallizes in the space group P21/c with a = 958.5 (13) pm, b = 1502 (2) pm, c = 2150 (5) pm, and β = 103.1 (2)°. The four atoms linked to palladium are approximately in one plane. The thiocarbonyl selenide unit is coordinated via C and Se with a S-C-Se angle of 141 (1)°. The C-Se and C-S distances are 180 (2) and 162 (2) pm; i.e., they are longer than in free CSSe. The Pd-P bond lengths (228.3 (5) pm trans to Se and 236.6 (5) pm trans to C) differ significantly reflecting the characteristic trans-lengthening effect of the CSSe carbon atom.
