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Platinum(II) Compounds with Enantiomerically Pure Bis(pinene)‐Fused Bipyridine Ligands − Diimine‐Dichloro Complexes and Their Substitution Reactions
Author(s) -
Kolp Brunhilde,
Abeln Dirk,
StoeckliEvans Helen,
von Zelewsky Alexander
Publication year - 2001
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200105)2001:5<1207::aid-ejic1207>3.0.co;2-4
Subject(s) - chemistry , diimine , pyridine , platinum , bipyridine , coordination sphere , stereochemistry , chelation , selectivity , medicinal chemistry , crystallography , organic chemistry , crystal structure , catalysis
The synthesis of chiral square‐planar Pt II complexes using symmetrical and unsymmetrical bis(pinene)‐fused 2,2′‐bipyridine is described. The neutral diimine dichloro complexes show a strong deviation of the coordination sphere from planarity if the pinene groups are attached at the 5‐ and 6‐positions of the pyridine rings. However, this distortion does not occur in parallel with the chiral configuration at the diimine ligands. The substitution of the two cis ‐chloro ligands with diamines to form five‐membered chelate rings shows little diastereoselectivity when racemic mixtures of chiral diamines are used. Also, ligands that are prochiral at the ligating centers show little selectivity upon coordination.