Neue Bis(phosphan)-nickel(0)-alkin-Komplexe /New Bis(phosphane)-nickel(0)-alkyne Complexes

Abstract

(Me₃P)₂Ni(C₂H₄) (5) and (dmpe) ₂Ni2(C₂H₄)₃ (6) react with various alkynes including ethyne (acetylene) and 1-alkynes to form the crystalline compounds (Me₃P)₂Ni(C₂RR′), (dmpe)Ni(C₂RR′), and (dmpe)₂Ni₂(C₂R₂)₂ (R.R′ = H, Me, Ph). Structural assignments were made on the basis of ¹H, ¹³C, and ³¹P NMR data. The crystal and molecular structure of (dmpe)Ni(C₂Ph₂) (17) has been determined by X-ray crystallography.