Photochemistry of Cr(CO)4(bpy) (bpy = 2,2′-bipyridine) studied by time-resolved infrared spectroscopy

Ian G. Virreis, Michael W. George, James J. Turner, Jonas Peters, Antonín Vlček

Research output: Journal PublicationArticlepeer-review

30 Citations (Scopus)

Abstract

Employing time-resolved IR spectroscopy, we have demonstrated that, following photolysis of Cr(CO)4-(bpy) (1) in CH2Cl2, the only detectablephotoproduct on the 50 ns time scale is the solvated CO-loss intermediate fac-Cr(CO)3(bpy)(CH2Cl2) (2); this intermediate is formed following either MLCT (532 nm) or LF (355 nm) excitation. The rate of the back-reaction of 2 with CO has been measured (k2 = 7.1 (±0.5) × 706M-1 s-1); in the presence of PPh3, the intermediate 2 reacts to produce fac-Cr(CO)3-(bpy)(PPh3) (3) exclusively (k2 = 1.0(±0.5)× 1.07 M-1 s-1). From UV/visible flash photolysis data, we conclude that this intermediate 2 is probably produced on a ps / subps time scale.

Original languageEnglish
Pages (from-to)4089-4092
Number of pages4
JournalOrganometallics
Volume15
Issue number19
DOIs
Publication statusPublished - 17 Sep 1996
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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