Structure of a New Phase of a Volatile Platinum(II) Complex with 1,1,1-Trifluoro-4-Iminopentan-2-One

The structure of a new phase of a volatile Pt(ktf)₂ complex, where ktf = CF₃–C(O)–CH–C(NH)–CH₃, is determined by single crystal X-ray diffraction. The crystallographic data for C₁₀H₁₀F₆N₂O₂Pt are as follows: a = 12.1716(7) Å, b = 8.5581(7) Å, c = 19.9966(15) Å, β = 96.840(3)°, space group P2₁/c, Z = 6, R = 0.046. The compound is a 2:1 mixture of cis- and trans-isomers. The square environment of the platinum atom consists of oxygen and nitrogen atoms of two bidentately bonded ketoiminate ligands, resulting in the PtO₂N₂ coordination core. The difference in Pt–O (2.005 Å) and Pt–N (1.990 Å) bond lengths is 0.015 Å in the trans-isomer; the O–Pt–N chelate angle is 93.6°. In the cis-isomer, the average Pt–O and Pt–N bond lengths are 2.002 Å and 1.967 Å respectively; the chelate angle is 94.8°. The molecules are packed into infinite stacks with Pt⋯Pt distances of 4.096 Å and 4.159 Å.