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Published April 30, 1986 | public
Book Section - Chapter

Photochemistry of Dinuclear d^8-d^8 Iridium and Platinum Complexes

Abstract

The long-lived (^3B_2 and ^3A_(2u)) excited states of the d8-d8 dimers [Ir(μ-pz)(COD)]_2 and Pt_2(pop)_4^(4-), respectively, undergo a variety of photochemical reactions (pzH is pyrazole; COD is 1,5-cyclooctadiene; pop is P_2O_5H_2^(2-), bridging pyrophosphite). Electron transfer reactions to one-electron acceptors such as pyridinium cations or substituted benzophenones are quite facile with acceptors that have reduction potentials as negative as -2.0 V vs. NHE. With halocarbon acceptors, d^7-d^7 oxidative addition products are obtained. Several organic substrates with relatively weak C-H bonds react with the triplet (dσ^*pσ) excited state of Pt_2(pop)_4^(4-) by H-atom transfer.

Additional Information

© 1986 American Chemical Society. Received November 8, 1985. Published in print 30 April 1986. J. L. M. thanks the Sun Co. for a graduate fellowship. This research was supported by National Science Foundation Grant CHE84-19828.

Additional details

Created:
August 19, 2023
Modified:
January 14, 2024