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Synthesis, characterisation and catalytic investigation of a new type of PC(sp(3))P pincer Pd(II) complex

Sjövall, Sven LU ; Wendt, Ola LU and Andersson, Carlaxel LU (2002) In Journal of the Chemical Society. Dalton Transactions p.1396-1400
Abstract
The diphosphine cis-1,3-bis[(di-tert-butylphosphino)methyl]cyclohexane (2) has been synthesised and its complexation in palladium chemistry has been investigated. Ligand 2 is capable of tricoordination, for instance as demonstrated by an X-ray crystal structure determination of the complex [Pd(2)I], and it is a rare example of a PC(sp(3))P pincer ligand. A catalytic study of the Heck reaction revealed that the bis-chelated complex [Pd(2)(CO2CF3)] is a highly active, air-stable precatalyst in the olefination of iodo- and bromo-benzenes. It is evident that, in comparison with the analogous aromatic PC(sp(2))P system, by switching the hybridisation of the central carbon donor atom from sp(2) to sp(3) improvement in terms of catalytic activity... (More)
The diphosphine cis-1,3-bis[(di-tert-butylphosphino)methyl]cyclohexane (2) has been synthesised and its complexation in palladium chemistry has been investigated. Ligand 2 is capable of tricoordination, for instance as demonstrated by an X-ray crystal structure determination of the complex [Pd(2)I], and it is a rare example of a PC(sp(3))P pincer ligand. A catalytic study of the Heck reaction revealed that the bis-chelated complex [Pd(2)(CO2CF3)] is a highly active, air-stable precatalyst in the olefination of iodo- and bromo-benzenes. It is evident that, in comparison with the analogous aromatic PC(sp(2))P system, by switching the hybridisation of the central carbon donor atom from sp(2) to sp(3) improvement in terms of catalytic activity is achieved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Chemical Society. Dalton Transactions
issue
7
pages
1396 - 1400
publisher
Royal Society of Chemistry
external identifiers
  • wos:000175112500028
ISSN
1472-7773
DOI
10.1039/b111487p
language
English
LU publication?
yes
id
de00e3e5-cab2-4dfb-a1e3-489736b83b0a (old id 339889)
date added to LUP
2007-11-07 18:26:42
date last changed
2016-10-27 16:11:40
@article{de00e3e5-cab2-4dfb-a1e3-489736b83b0a,
  abstract     = {The diphosphine cis-1,3-bis[(di-tert-butylphosphino)methyl]cyclohexane (2) has been synthesised and its complexation in palladium chemistry has been investigated. Ligand 2 is capable of tricoordination, for instance as demonstrated by an X-ray crystal structure determination of the complex [Pd(2)I], and it is a rare example of a PC(sp(3))P pincer ligand. A catalytic study of the Heck reaction revealed that the bis-chelated complex [Pd(2)(CO2CF3)] is a highly active, air-stable precatalyst in the olefination of iodo- and bromo-benzenes. It is evident that, in comparison with the analogous aromatic PC(sp(2))P system, by switching the hybridisation of the central carbon donor atom from sp(2) to sp(3) improvement in terms of catalytic activity is achieved.},
  author       = {Sjövall, Sven and Wendt, Ola and Andersson, Carlaxel},
  issn         = {1472-7773},
  language     = {eng},
  number       = {7},
  pages        = {1396--1400},
  publisher    = {Royal Society of Chemistry},
  series       = {Journal of the Chemical Society. Dalton Transactions},
  title        = {Synthesis, characterisation and catalytic investigation of a new type of PC(sp(3))P pincer Pd(II) complex},
  url          = {http://dx.doi.org/10.1039/b111487p},
  year         = {2002},
}