Crystal and molecular structure of chloro-(2-methoxycyclo-octa-1,5-dienyl)pyridineplatinum

Abstract

Crystals of the title compound are monoclinic, a= 9·84 ± 0·01, b= 18·50 ± 0·02, c= 8·15 ± 0·01 Å, β= 104°± 10′, Z= 4, space-group P2₁/c. The structure was determined from photographic data by conventional Patterson and Fourier methods and refined by least-squares techniques to R 0·086 for 1445 independent reflections. The structure consists of monomeric units in which the central atom is in an essentially square planar configuration. The cyclo-octadienyl ligand is bonded to the platinum atom by both a π-olefinic bond and a σ-bond, the pyridine being trans to the latter. The long Pt–N distance [2·02(2)Å] results from the large trans-influence of the σ-bonded carbon atom.