89486-80-6Relevant academic research and scientific papers
Synthesis and reactivity of (chlorovinyl)nickel complexes: An unusual symmetrization reaction. X-ray crystal structure of [Ni(CCl=CCl2)2(PMe2Ph)2]
Carvajal, Jorge,Muller, Guillermo,Sales, Joaquim,Solans, Xavier,Miravitlles, Carles
, p. 996 - 1002 (1984)
The oxidative addition of CCl2=CCl2, CCl2=CHCl, trans-CHCl=CHCl, and CH2=CCl2 to [Ni(PPh3)n], prepared in situ from NiCl2, PPh3, and NaBH4, gives square-planar trans-[NiCl]chlorovinyl)(PPh3)2]. The addition takes place at the less hindered C-Cl bond, with retention of geometry. The PPh3 ligand is replaced by dppe in [NiCl(C2Cl3)(PPh3)2] giving [NiCl(C2Cl3)dppe] whereas the action of N-donor bidentate ligands gives a symmetrization reaction, forming [NiCl2(LL)] and [Ni(C2Cl3)2(LL)] (LL = 2,2′-bpy and o-phen). The ligand bpy may be replaced by phosphines like PMe2Ph and PEt3 in the trichlorovinyl complex. The crystal structure of trans-[Ni(C2Cl3)2(PMe2Ph) 2] (monoclinic, space group P21/c, a = 9.203 (2) ?, b = 16.005 (3) ?, c = 9.604 (2) ?, β = 114.79 (3)°, Z = 2) shows the presence of the anti and syn isomere in the solid. The Ni-P bond distance and the mean Ni-C bond distance are 2.201 (1) and 1.91 (1) ?, respectively. 31P and 13C NMR spectra indicate that similar amounts of syn and anti isomers are present in solution.
