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首页> 外文期刊>Chemistry: A European journal >Low-Temperature IR and NMR Studies of the Interaction of Group 8 Metal Dihyrides with Alcohols
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Low-Temperature IR and NMR Studies of the Interaction of Group 8 Metal Dihyrides with Alcohols

机译：第8族金属二氢化物与醇相互作用的低温IR和NMR研究

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摘要

The reaction sof the octahedral dihydrido complexes [MH_2(PP_3)] [M = Fe, Ru, Os; PP_3 = P-(CH_2CH_2PPh_2)_3] with a variety of weak ROH acids have been studied by IR and NMR methods in either CH_2Cl_2 or THF in the temperature range from 190 to 290 K. This study has allowed the determination of the spectral and thermodynamic properties associated with the formation of dihydrogen bonds (DHB) between the terminal hydrides and the OH groups. Both the DHB enthalpy values and the hydride basicity factors (E_j) have been found to increase in the order Fe < Ru < Os. The proton transfer process, leading to the DHB complexes, and eventually to eta~2-H_2 products, has been found to depend on the acidic strength of the alcohol as well as the nature of the solvent. Low temperature IR and NMR techniques have been used to trace the complete energy profile of the proton transfer process invoving the osmium complex [OsH_2(PP_3)] with trifluoroethanol.
机译：八面体二氢配合物[MH_2（PP_3）]的反应[M = Fe，Ru，Os;已通过IR和NMR方法在CH_2Cl_2或THF中在190至290 K的温度范围内研究了具有各种弱ROH酸的PP_3 = P-（CH_2CH_2PPh_2）_3]。该研究可用于确定光谱和热力学与在末端氢化物和OH基团之间形成二氢键（DHB）有关的特性。已发现DHB焓值和氢化物碱度因子（E_j）均按Fe

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