Karsch, Hans H. Leithe, Andreas W. Reisky, Manfred Witt, Eva Nickel Complexes with Heterobutadiene Ligands The reactions of 4,4-bis(trifluoromethyl)-substituted hetero-1,3-dienes with Ni(cod)<sub>2</sub> and Ni(PMe<sub>3</sub>)<sub>2</sub>(cod) afford stable coordination compounds containing a trigonal planar Ni(0) center. The substitution of co-ligands by <i>tert</i>-butylisonitrile leads to five-membered nickelacycles by an unprecedented oxidative [4+1] cycloaddition of the hetero-1,3-diene to Ni(0) under formation of new Ni−C and Ni−O or Ni−N bonds. The nature of the resulting nickelacycloheteropentene derivatives decisively depends on the electronic and steric nature of the hetero-1,3-dienes. All compounds have been characterized by NMR, IR, or mass spectroscopy. X-ray crystal structure determinations are reported for four typical examples. steric nature;coordination compounds;mass spectroscopy;nickelacycloheteropentene derivatives;IR;Nickel Complexes;NMR;Heterobutadiene Ligands 1998-12-12
    https://acs.figshare.com/articles/journal_contribution/Nickel_Complexes_with_Heterobutadiene_Ligands/3782838
10.1021/om980450o.s001