Photooxidation of a platinum-anthracene pincer complex: formation and structures of Pt(II)-anthrone and -ketal complexes

Jian Hu; Huan Xu; Minh-Hai Nguyen; John H K Yip

doi:10.1021/ic900479w

Photooxidation of a platinum-anthracene pincer complex: formation and structures of Pt(II)-anthrone and -ketal complexes

Inorg Chem. 2009 Oct 19;48(20):9684-92. doi: 10.1021/ic900479w.

Authors

Jian Hu¹, Huan Xu, Minh-Hai Nguyen, John H K Yip

Affiliation

¹ Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 11754.

PMID: 19817495
DOI: 10.1021/ic900479w

Abstract

Irradiating the cyclometalated pincer complex Pt(II)(DPA)Cl (1, DPA = 1,8-bis(diphenylphosphino)anthracene) in the presence of O(2) led to three sequential oxidations of the anthracenyl ring. The first photoproduct, a Pt(II)-9,10-endoperoxide complex, was converted photochemically to a Pt(II)-9-hydroxyanthrone complex A which was further oxygenated to a Pt(II)-hemiketal (B). The oxidation of A, which could be accelerated by light irradiation, probably involved a Pt(II)-anthraquinone intermediate. B underwent acid-catalyzed ketalization to form a binuclear Pt(II)(2)-diketal (B1). The photolysis was followed by UV-vis absorption and NMR spectroscopy, and the structures of A and B1 were characterized by single crystal X-ray diffraction.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Anthracenes / chemistry*
Models, Molecular
Molecular Structure
Oxidation-Reduction
Photochemistry*
Photolysis
Platinum Compounds / chemistry*
X-Ray Diffraction

Substances

Anthracenes
Platinum Compounds
anthrone