Reactions of C-imidazolyllithium derivatives with Group Ib compounds: tris3,C2)>tri-gold(I) and -silver(I). Crystal structure of bis (1-benzylimidazolin-2-yliden)gold(I) chloride

Article abstract of DOI:10.1016/0022-328X(89)85094-6

Upon reaction of LMX (M=Au, X=Cl, L=PPh3 or Me2S; M=Ag, X=NO3, L=Me2S) with 1-R-2-lithiumimidazole the lithium is replaced by a noble metal to give the species (1-R-2-M-imidazole)_n (M=Au, R=methyl or benzyl, n=3; M=Ag, R=benzyl).From Me2SCuBr the compound bis(1-R-imidazol-2-yl) was obtained (R=methyl or benzyl).The unexpected formation during work up of , a carbene derivative, was confirmed by an X-ray crystal structural study which showed the presence of two independent molecules where C-Au-C is 175.2(4) or 176.6(4) deg, average Au-C is 2.027(7) Angstroem, and there is an Au...Au interaction at 3.2630(5) Angstroem.