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Synthesis of nickel(II) complexes containing neutral N,N- and anionic N,O- bidentate ligands, and their behaviour as chain-growth catalysts; structural characterisation of complexes containing (mim)2CO, mimCO2-, and mimCPh2O- (mim = 1-methylimidazol-2-yl)

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Batten, MP and Canty, AJ and Cavell, KJ and Ruther, T and Skelton, BW and White, AH (2006) Synthesis of nickel(II) complexes containing neutral N,N- and anionic N,O- bidentate ligands, and their behaviour as chain-growth catalysts; structural characterisation of complexes containing (mim)2CO, mimCO2-, and mimCPh2O- (mim = 1-methylimidazol-2-yl). Inorganica Chimica Acta, 359 (6). pp. 1710-1724. ISSN 0020-1693

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Abstract

The complexes NiBr2(L2) [L2 = (mim)2CO (7a), (bim)2CO (7b), py(mim)CO (8), PhN=CHbim (9)], NiBr(o-Tol){(mim)2CO} (10), Ni(L2)(o-Tol)(PPh3) [L2 = mimCO2- (11a); bmCO2- (11b), mimCPh2O- (12), mimC6H4O- (13)], and [Ni{(mim)2CO}3][BF4]2.0.25H2O (16) have been synthesised from nickel(II) salts (7–9, 16) or NiBr(o-Tol)(PPh3)2 [10–13], where mim = 1-methylimidazol-2-yl, bim = 1-benzylimidazol-2-yl, and py = pyridin-2-yl. The square-planar complexes (11a, 12) and octahedral 16 have been characterised by X-ray diffraction studies, together with octahedral cis-[Ni{(mim)2CO}2Br(OH2)]Br.CD3CN (14) and cis-[Ni{(mim)2CO}2(OH2)2]Br2.3CD3CN (15). Preliminary catalytic studies have been undertaken with a number of the nickel complexes. Complexes 11–13 form single component catalysts for the oligomerization or polymerization of ethylene and the bromo-complexes (7–9) form active catalysts for the oligomerization or polymerization of ethylene when activated with MMAO.

Item Type: Article
Keywords: Nickel; Catalysis; Imidazole; Structure; X-ray; Bidentate
Journal or Publication Title: Inorganica Chimica Acta
Page Range: pp. 1710-1724
ISSN: 0020-1693
Identification Number - DOI: 10.1016/j.ica.2004.06.069
Additional Information: The definitive version is available at http://www.sciencedirect.com
Date Deposited: 03 Jan 2008 23:24
Last Modified: 18 Nov 2014 03:26
URI: http://eprints.utas.edu.au/id/eprint/2795
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