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The mol­ecular structure of the title compound, [Ni(C 19 H 21 N 2 P) 2 ]I 2 ·2CH 3 CN, shows two six-membered  N -heterocyclic carbene/phosphane chelate rings that form a nearly square-planar coordination geometry around the Ni II  atom, which lies 0.190 (1) Å above the C 2 P 2  plane. The sum of the bond angles at the Ni II  atom is 358.68 (6)°, with C—Ni—P bite angles of 82.89 (5) and 84.08 (6)°. The two carbene rings make a dihedral angle of 52.65 (8)°.

Bis{1-[2-(diphenylphosphanyl)ethyl]-3-ethylimidazol-2-ylidene}nickel(II) diiodide acetonitrile disolvate