10.1021/om010449g.s002
Jonathan W. Slater
Jonathan W.
Slater
Donocadh P. Lydon
Donocadh P.
Lydon
Nathaniel W. Alcock
Nathaniel W.
Alcock
Jonathan P. Rourke
Jonathan P.
Rourke
Doubly Cyclometalated Pyridazines: Contrasting
Behavior with Palladium and Platinum
American Chemical Society
2001
metal source
cycloplatination
cyclometalation
chloride
palladium
2001-09-11 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Doubly_Cyclometalated_Pyridazines_Contrasting_Behavior_with_Palladium_and_Platinum/3766491
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.