(Di‐tert‐butylmethylphosphane)(η2‐di‐tert‐butylphosphanylphosphinidene)(triphenylphosphane)platinum(0)

The crystal structure of the title compound, Pt(C₈H₁₈P₂)(C₉H₂₁P)(C₁₈H₁₅P)] or (Ph₃P)(^tBu₂PMe)Pt(η²‐^tBu₂PP)], contains four molecules in the asymmetric unit with slightly different conformations. The P—P distances in the ^tBu₂PP ligands are similar for all four molecules 2.0661 (13)–2.0678 (13) Å] and indicate a multiple character of the P—P bond in the ^tBu₂PP ligand. Molecules of the asymmetric unit can be assembled into a tetrahedron that fulfils the requirements for a rhombic disphenoid. The coordination of the Pt atom in all four molecules is square planar, with r.m.s. deviations from the PtP₄ planes in the range 0.03–0.05 Å. All planes of the PtP₄ groups are approximately parallel to the ab plane of the unit cell. The structure represents an unusual unsymmetrical platinum phosphinidene derivative.