K. Angermaier et al., CRYSTAL-STRUCTURES OF CHLORO(TRIMETHYLPHOSPHINE)GOLD(I), CHLORO(TRI-(I)PROPYLPHOSPHINE)GOLD(2) AND BIS(TRIMETHYLPHOSPHINE)GOLD(I) CHLORIDE, Journal of organometallic chemistry, 472(1-2), 1994, pp. 371-376
The crystal structures of chloro(trimethylphosphine)gold(I), chloro(tr
i-(i)propylphosphine)gold(I) and bis(trimethylphosphine)gold(I) chlori
de . 2CHCl3 have been determined. by single crystal X-ray diffraction
studies. The monomeric units of the molecular complexes (Me3P)AuCl (1)
and ((i)Pr3P)AuCl (2) have linear P-Au-Cl axes. However, the monomers
of (Me3P)AuCl are aggregated to form a helical chain through fairly s
hort alternating Au ... Au contacts of 327.1(1), 335.6(1), and 338.6(1
) pm and Au-Au-Au angles of 141.6(1), 141.8(1) and 141.9(1)-degrees. B
y contrast, the monomers of compound 2 show no such Au ... Au contacts
in the lattice. This distinction between the two structures of the tw
o analogous species is attributed to the different steric requirements
of the phosphines. The crystals of bis(trimethylphosphine)gold(I) chl
oride (3) . 2CHCl3 consist of layers of (Me3P)2AuCl complexes separate
d by layers of solvent molecules. The P-Au-P coordination is almost li
near, with a chlorine atom at right angles (Au-Cl = 316.7(1) pm, Cl-Au
-P = 92.3(1)-degrees).