K. Angermaier, E. Zeller, H. Schmidbaur
Jun 14, 1994
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Journal
Journal of Organometallic Chemistry
Abstract
Abstract The crystal structures of chloro(trimethylphosphine)gold(I), chloro(tri- i propylphosphine)gold(I) and bis(trimethylphosphine)gold(I) chloride · 2CHCl 3 have been determined by single crystal X-ray diffraction studies. The monomeric units of the molecular complexes (Me 3 P)AuCl ( 1 ) and ( i Pr 3 P)AuCl ( 2 ) have linear PAuCl axes. However, the monomers of (Me 3 P)AuCl are aggregated to form a helical chain through fairly short alternating Au ⋯ Au contacts of 327.1(1), 335.6(1), and 338.6(1) pm and AuAuAu angles of 141.6(1), 141.8(1) and 141.9(1)°. By contrast, the monomers of compound 2 show no such Au ⋯ Au contacts in the lattice. This distinction between the two structures of the two analogous species is attributed to the different steric requirements of the phosphines. The crystals of bis(trimethylphosphine)gold (I) chloride ( 3 )·2CHCl 3 consist of layers of (Me 3 P) 2 AuCl complexes separated by layers of solvent molecules. The PAuP coordination is almost linear, with a chlorine atom at right angles (AuCl = 316.7(1) pm, ClAuP = 92.3(1)°).