Synthesis, spectroscopy, and photochemistry of bis[bis(diphenylphosphino)-methane]bis(2,5-di-isocyano-2,5-dimethylhexane) dirhodium(I)

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Author(s)

  • Chi-Ming Che
  • Wai-Man Lee
  • Hoi-Lun Kwong
  • Vivian Wing-Wah Yam
  • Kar-Cheong Cho

Detail(s)

Original languageEnglish
Pages (from-to)1717-1722
Journal / PublicationJournal of the Chemical Society, Dalton Transactions
Issue number5
Publication statusPublished - 1990

Abstract

Reaction between [Rh2L4]2+ (L = 2,5-di-isocyano-2,5-dimethylhexane) and dppm [bis(diphenylphosphino)methane] in acetonitrile yielded [Rh2L2(dppm)2]2+. Its optical spectrum displays an intense absorption at 595 nm, which is assigned to the transition 1A1g[(dσ*)2] → 1B1u [(dσ*)1(pσ)1]. Room-temperature fluorescence at 677 nm, from the 1B1u excited state, is observed in fluid solution. The 3B1u state of the rhodium complex is long-lived with a measured lifetime of 1.0 ± 0.1 μs. Studies on the quenching reactions with a series of pyridinium acceptors established that the excited reduction potential [E°(Rh2 3+-Rh2 2+*)] is -1.13 V vs. saturated calomel electrode. The mechanism of the photoreactions of the rhodium complex with halogenocarbons is discussed.

Citation Format(s)

Synthesis, spectroscopy, and photochemistry of bis[bis(diphenylphosphino)-methane]bis(2,5-di-isocyano-2,5-dimethylhexane) dirhodium(I). / Che, Chi-Ming; Lee, Wai-Man; Kwong, Hoi-Lun; Yam, Vivian Wing-Wah; Cho, Kar-Cheong.

In: Journal of the Chemical Society, Dalton Transactions, No. 5, 1990, p. 1717-1722.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal