Issue 10, 2023

Visible light induced formation of a tungsten hydride complex

Abstract

When irradiated with blue light in the presence of a Lewis base (L), [CpW(CO)3]2 undergoes metal–metal bond cleavage followed by a disproportionation reaction to form [CpW(CO)3L]+ and [CpW(CO)3]. Here, we show that in the presence of pyridinium tetrafluoroborate, [CpW(CO)3] reacts further to form a metal hydride complex CpW(CO)3H. The rection was monitored through in situ photo 1H NMR spectroscopy experiments and the mechanism of light-driven hydride formation was investigated by determining quantum yields of formation. Quantum yields of formation of CpW(CO)3H correlate with I−1/2 (I = photon flux on our sample tube), indicating that the net disproportionation of [CpW(CO)3]2 to form the hydride precursor [CpW(CO)3] occurs primarily through a radical chain mechanism.

Graphical abstract: Visible light induced formation of a tungsten hydride complex

Supplementary files

Article information

Article type
Paper
Submitted
16 nov 2022
Accepted
07 fev 2023
First published
17 fev 2023

Dalton Trans., 2023,52, 3210-3218

Author version available

Visible light induced formation of a tungsten hydride complex

D. P. Isaacs, C. T. Gruninger, T. Huang, A. M. Jordan, G. Nicholas, C. Chen, M. A. ter Horst and J. L. Dempsey, Dalton Trans., 2023, 52, 3210 DOI: 10.1039/D2DT03675D

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