Library Open Repository

Synthetic and Structural Studies of Binuclear Organopalladium(II) Complexes Including a Bis(pyridin-2-y1)phenylmethyl Complex with Four- and Eight-Membered Palladocycle Rings, trans(N,N)-{(Pd(mu-Py2PhC-N,N',C')Cl}2.1/2CH2Cl2.1/2Me2CO

Downloads

Downloads per month over past year

Canty, AJ and Minchin, NJ and Engelhardt, LM and Skelton, BW and White, AH (1988) Synthetic and Structural Studies of Binuclear Organopalladium(II) Complexes Including a Bis(pyridin-2-y1)phenylmethyl Complex with Four- and Eight-Membered Palladocycle Rings, trans(N,N)-{(Pd(mu-Py2PhC-N,N',C')Cl}2.1/2CH2Cl2.1/2Me2CO. Australian Journal of Chemistry, 41 (5). pp. 651-665. ISSN 0004-9425

[img] PDF
AJC1988_2C_651.pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.

Abstract

The (pyridin-2-y1)phenylchloromethanes PyPh2CCl and Py2PhCCl undergo oxidative addition reactions with bis(dibenzylideneacetone)palladium(0) to form {Pd(PyPh2C)C1}2 (1) and {Pd(Py2PhC)C1}2.1/2CH2C12.1/2Me2CO (2), respectively. N.m.r, studies of (1) in CDC13 indicate presence of an equilibrium between two isomers, involving the ligand (pyridin-2-y1)diphenylmethyl in eta3-coordination, {Pd(eta3-PyPh2C)(mu-Cl)}2. Complex (2) has two bis(pyridin-2-y1)phenylmethyl groups present as bridging N,C'-ligands, with the groups also N,C-bidentate to each palladium, to form a binuclear complex containing four- and eight-membered palladocycles. Both palladium(II) centres in (2) have square-planar 'trans-PdCN2C1' coordination, so that (2) may be represented as trans(N,N)-{Pd(mu-Py2PhC-N,N',C')Cl)}2.1/2CH2C12.1/2Me2C0. A complex similar to (2), trans(N,N)-{(Pd(mu-PyPhCH-N,C')(gamma-mpy)Cl}2.CH2C12 (3), forms on reaction of the lithium derivative of 2-benzylpyridine, Li(PyPhCH), with dichlorobis(4-methylpyridine)palladium(II); (3) reacts with excess 2-benzylpyridine with displacement of gamma-mpy to form trans(N,N)-{Pd(mu-PyPhCH-N,C')(PyPhCH2)C1}2 (4). In developing an alternative isolation procedure for (3), involving column chromatography with 4% ethyl acetate in chloroform, the coordination complex trans-bis{1-phenyl- 1-pyridin-2-y1)prop-1-en-2-olato-O,N]palladium(II), Pd{(PyPhC)C(Me)O}2 (5), was isolated in low yield. X-Ray structural studies of (2)-(5) have been completed.

Item Type: Article
Journal or Publication Title: Australian Journal of Chemistry
Page Range: pp. 651-665
ISSN: 0004-9425
Identification Number - DOI: 10.1071/CH9880651
Date Deposited: 31 Jan 2008 23:13
Last Modified: 18 Nov 2014 03:27
URI: http://eprints.utas.edu.au/id/eprint/2931
Item Statistics: View statistics for this item

Repository Staff Only (login required)

Item Control Page Item Control Page