Transmetallation of a binuclear complex of nickel(0). Synthesis and structure of Cl

Article abstract of DOI:10.1016/0022-328X(88)80126-8

The metallation of Ni2(μ-CNMe)(CNMe)2(dppm)2 (1) (dppm=PPh2CH2PPh2) with (PPh3)Au(Cl) affords the transmetallation product, Cl (2) in 49percent yield.The 31P NMR spectrum of 1 is an AA'BB' spin system centered at δ 39.2 ppm.An X-ray structural study of the title compound was undertaken.Complex 2 crystallizes in the monoclinic space group Pn with a 12.992(1) Angstroem, b 11.760(1) Angstroem, c 17.579(2) Angstroem, β 109.36(2) deg, V 2534(1) Angstroem³, and Z=2.The structure was refined to convergence leading to R and R_w of 0.020 and 0.025, respectively, for 3062 observations in the range 4 deg<2Ο<45 deg with I>3.0 ?(I) and Mo-K_α radiation.The Ni-Au separation is 3.0146(9) Angstroem, suggesting there is not a significant Ni-Au interaction.The complex exhibits a cis-trans arrangement of the bridging dppm diphosphine ligands with esentially tetrahedral NiP2L2 (L=CNMe) and linear AuP2 centers.