Palladium complexes containing large fused aromatic N-N ligands as efficient catalysts for the CO/styrene copolymerization

Sheba D. Bergman, Israel Goldberg, Carla Carfagna, Luca Mosca, Moshe Kol*, Barbara Milani

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Bis(homoleptic) palladium(II) complexes of the extended aromatic ligands eilatin ([Pd(eil)2][BF4]2 (1a)) and dipyridophenazine ([Pd(dppz)2][BF4]2 (2a), [Pd(dppz)2][PF6]2 (2b)) were synthesized and employed in the copolymerization of carbon monoxide and styrene. The eilatin ligand in the complex [Pd(eil)2]-[BF4]2 is bound via its less hindered "head" coordination site. The X-ray structure of 2b was solved and indicated a highly twisted square planar geometry around the palladium center and the presence of π-stacking interactions of two types. All complexes were found to be active catalysts for the synthesis of the syndiotactic CO/styrene polyketone, their activity exceeding that of the parent complex [Pd(phen)2]-[BF4]2.

Original languageEnglish
Pages (from-to)6014-6018
Number of pages5
JournalOrganometallics
Volume25
Issue number26
DOIs
StatePublished - 18 Dec 2006

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