作者:Ronit Elgamiel、Ilan Huppert、Eli Lancry、Yafit Yerucham、Richard H. Schultz
DOI:10.1021/om000105a
日期:2000.6.1
UV photolysis of a cyclohexane solution of W(CO)(6) in, the presence of 2,5-dihydrofuran. (DHF) yields W(CO)(5)(eta(1)(O)-DHF) with a bimolecular rate constant on the order of 10(7) L mol(-1) s(-1). Time-resolved IR (TRIR) absorption spectroscopy is used to monitor the consequent intramolecular isomerization to W(CO)(5)(eta(2)-(C,C)-DHF), which occurs with a rate constant on the order of 1-10 s(-1) at 20-60 degrees C; activation parameters for the isomerization are determined to be Delta H-double dagger =17.3 +/- 0.3 kcal/mol and Delta S-double dagger = 0.9 +/- 0.9 eu.