Homopiperazine platinum(II) complexes containing substituted disulfide groups: Crystal structure of [PtII(homopiperazine)(diphenylsulfide)Cl]NO3

Abstract

A series of new cationic platinum(II) complexes of the type [Pt(L)(R′R″S)Cl]NO3 (where L = homopiperazine or 1-methylhomopiperazine and R′R″S = dimethylsulfide, diethylsulfide, dipropylsulfide, diisopropylsulfide, dibutylsulfide, diphenylsulfide, dibenzylsulfide, methylphenylsulfide, or methyl p-tolylsulfide) were synthesized and characterized by elemental analysis and infrared, 1H and 195Pt nuclear magnetic resonance spectroscopy. Among the complexes synthesized, [Pt11(homopiperazine)(diphenylsulfide)Cl]NO3 was examined by single-crystal X-ray diffraction. The slightly distorted square plane of the platinum complex included the amino groups of the homopiperazine molecule in a cis orientation, the sulfur atom of diphenyl sulfide, and a chloride ion. The homopiperazine molecule adopts a boat conformation and forms five- and six-membered chelating rings with platinum. Hydrogen bonding plays an important part in holding the crystal together. © 2002 Elsevier Science Ltd. All rights reserved.

Publication Title

Polyhedron

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