Doubly cyclometalated pyridazines: Contrasting behavior with palladium and platinum

Slater, J.W., Lydon, D.P., Alcock, N.W. and Rourke, J.P. ORCID: https://orcid.org/0000-0002-8961-1021 2001. Doubly cyclometalated pyridazines: Contrasting behavior with palladium and platinum. Organometallics 20 (21) , pp. 4418-4423. 10.1021/om010449g

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Abstract

The cyclometalation of 3,6-diphenylpyridazines with palladium and platinum has been studied. When palladium acetate is used as the metal source, two sequential cyclometalations are observed, with the first cyclometalation deactivating the system toward a second cyclometalation. Both monocyclopalladated and dicyclopalladated species have been isolated and characterized as their acetylacetonate derivatives. When potassium tetrachloroplatinate is used as the metal source, only double cycloplatination is observed:  the first cycloplatination activates the system toward a second cycloplatination through a combination of nitrogen coordination and a chloride bridging two platinums. A doubly cycloplatinated compound has been isolated as its triphenylphosphine derivative, which has been fully characterized:  the single-crystal X-ray structure shows that the two platinums are bridged by a chloride.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Publisher:	American Chemical Society
ISSN:	0276-7333
Last Modified:	12 Apr 2023 14:45
URI:	https://orca.cardiff.ac.uk/id/eprint/155213

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