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Issue 22, 2015
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2-(2′-Pyridyl)-4,6-diphenylphosphinine versus 2-(2′-pyridyl)-4,6-diphenylpyridine: synthesis and characterization of novel Cr0, Mo0 and W0 carbonyl complexes containing chelating P,N and N,N ligands

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Abstract

Replacing nitrogen by phosphorus in otherwise similar structures changes the properties of the resulting compounds significantly due to the electronic differences that exist between these heteroatoms. While the “hard” nitrogen atom of the pyridine moiety acts as a good σ-donor, the “soft” phosphorus atom of the phosphinine core results in a rather strong π-acceptor capacity. A series of novel group 6 complexes [M(CO)4(L^L)] (M = Cr0, Mo0, W0) have been synthesized, in which L^L is either 2-(2′-pyridyl)-4,6-diphenylphosphinine (P,N) or the corresponding bipyridine derivative, 2-(2′-pyridyl)-4,6-diphenylpyridine (N,N) as a chelating, bidentate ligand. The here presented results describe a detailed investigation of the structural and spectroscopic properties of the coordination compounds [M(CO)4(P,N)] and [M(CO)4(N,N)] (M = Cr0, Mo0, W0), leading to a better understanding of such intriguing aromatic phosphorus heterocycles.

Graphical abstract: 2-(2′-Pyridyl)-4,6-diphenylphosphinine versus 2-(2′-pyridyl)-4,6-diphenylpyridine: synthesis and characterization of novel Cr0, Mo0 and W0 carbonyl complexes containing chelating P,N and N,N ligands

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Supplementary files

Article information


Submitted
01 Apr 2015
Accepted
07 May 2015
First published
07 May 2015

Dalton Trans., 2015,44, 10304-10314
Article type
Paper
Author version available

2-(2′-Pyridyl)-4,6-diphenylphosphinine versus 2-(2′-pyridyl)-4,6-diphenylpyridine: synthesis and characterization of novel Cr0, Mo0 and W0 carbonyl complexes containing chelating P,N and N,N ligands

I. de Krom, M. Lutz and C. Müller, Dalton Trans., 2015, 44, 10304
DOI: 10.1039/C5DT01261A

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