A novel platinum methylene complex

Praefcke K., Bilgin B., Pickardt J., Borowski M.

JOURNAL OF ORGANOMETALLIC CHEMISTRY, vol.592, no.2, pp.155-161, 1999 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 592 Issue: 2
  • Publication Date: 1999
  • Doi Number: 10.1016/s0022-328x(99)00441-6
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.155-161
  • Keywords: anti/syn-transformation, cycloplatination, halogen exchange, liquid crystal discussion, overcrowded platinum organyls, oxidative addition, platinum complexes of different oxidation states, platinum methylene complexes, X-ray structure analysis, RAY CRYSTAL-STRUCTURE, OXIDATIVE ADDITION, LIQUID-CRYSTALS, METAL-COMPLEXES, METALLOMESOGENS, CHEMISTRY, LIGANDS, MECHANISM, ORGANYLS, PHASES
  • Yıldız Technical University Affiliated: Yes


The dichlorobridged diplatinum organyls 4 and 5 undergo the expected chlorine-iodine exchange when treated with lithium iodide in diiodomethylene. Surprisingly, a second type of product, the triple-bridged (one methylene group plus two iodo units between the two Pt atoms) diplatinum complexes 7 and 8, respectively, are also formed in these unusual reactions. The formation of these latter two interesting, novel compounds takes place via a change of configuration of their two ligand sections from anti of their precursors (4 and 5, respectively) to syn present in 7 and 8; the mechanism of this process, however, is not yet clear. The molecular structures of 7 and 8 are based on an X-ray crystal analysis of 7 and on their comparable characteristic NMR data. (C) 1999 Elsevier Science S.A. All rights reserved.