Dihydride versus dihydrogen complex; the photochemical reaction of [(η5;-C5H5)M(CO)4](M = V, Nb and Ta) with hydrogen in solution at both cryogenic and room temperatures
- 1 January 1991
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 16,p. 1101-1103
- https://doi.org/10.1039/c39910001101
Abstract
UV photolysis of [cpM(CO)4](cp =η5-C5H5; M = V, Nb and Ta) and H2has been studied by IR spectroscopy both in n-heptane solution at 25 °C and in liquid Xenon solution at –110 to –45 °C; for V, the reaction leads to formation of the non-classical complex [cpV(CO)3(η2-H2)] while, for Ta, the dihydride [cpTa(CO)3H2] is formed; for Nb, there is a temperature dependent equilibrium between the classical [cpNb(CO)3H2] and non-classical [cpNb(CO)3(η2-H2)] compounds, which presents an unusual opportunity to study the formation of these species using nanosecond Time-resolved IR spectroscopy (TRIR).Keywords
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