Observation of the (eta(5)-C5H5)Mn(CO)(2)(toluene) complex by low-temperature IR spectroscopy and determination of the manganese - Toluene bond strength
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abstract
The (5-C5H5)Mn(CO)2(toluene) complex formed upon UV photolysis of (5-C5H5)Mn(CO)3 in heptane solution in the presence of toluene was detected using low-temperature IR spectroscopy. The toluene molecule is most likely bound to the Mn center in an 2 fashion. The displacement of the toluene ligand by tetrahydrofuran has been studied, and the reaction is found to proceed through a dissociative pathway. Activation analysis yields a value of 14.20.8 kcal/mol for the CpMn(CO)2-toluene bond energy.