Aliphatic pincer-type POCOP ligands and their complexation behaviour with iridium: Crystal structure of an iridium(III) phosphinite complex
Author
Summary, in English
Reaction of 2 equivalents of 1,3-bis-(di-tert-butylphosphinito)-2-methyl-propane (1a) with [Ir(COD)Cl](2) affords the first aliphatic diphosphinite PCP pincer complex with iridium, Ir(H){(t-Bu2POCH2)(2)C(Me)}Cl (2). The poor yield of 2 is partly explained by the formation of a di-nuclear byproduct [IrCl(COD)](2)(mu(2)-{(t-Bu2POCH2)(2)CH(Me)}) (3). Reaction of 1,3-bis-(di-iso-propylphosphinito)-2-methyl-propane (1b) under the same condition does not give any cyclometallation, and reaction with IrCl3 center dot H2O in DMF leads to complete decomposition of the pincer ligand under the formation of Ir(H)(i-Pr2P(OH))(3)(CO) (4), underpinning the comparatively low thermal stability of aliphatic phosphinite pincer systems. (C) 2011 Elsevier B.V. All rights reserved.
Department/s
Publishing year
2011
Language
English
Pages
76-80
Publication/Series
Inorganica Chimica Acta
Volume
379
Issue
1
Document type
Journal article
Publisher
Elsevier
Topic
- Organic Chemistry
Keywords
- Aliphatic pincer complexes
- Cyclometallation
- Iridium
- Phosphinites
Status
Published
ISBN/ISSN/Other
- ISSN: 0020-1693