Platinum(II) Complexes of Piperazine (and Derivatives): cis-Diiodo(N-methylpiperazine-N,N')platinum(II)

The neutral chelate title complex, cis-[PtI₂(C₅H₁₂N₂)], has a distorted square-planar geometry around the Pt atom. The N and I atoms lie almost perfectly in a plane but the N-Pt-N angle is reduced to 70.1 (7)° while the I-Pt-I angle is 93.40 (5)°. The molecular structure, which resembles roughly that of the more symmetric cis-dichloro(N,N'-dimethylpiperazine-N,N')platinum(II), shows some asymmetric distortions, for example, the two Pt-N distances of 2.05 (2) and 2.13 (1) Å. These distortions are mainly caused by steric hindrance between the bulky I atom and the methyl group of the N-methylpiperazine ligand.

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