Synthesis, crystal structure and spin exchange coupling in polynuclear carboxylates with {Li 2 (VO) 2 } metal core
作者:Evgeniya S. Bazhina、Grigory G. Aleksandrov、Mikhail A. Kiskin、Nikolay N. Efimov、Elena A. Ugolkova、Alexander A. Korlyukov、Oleg M. Nikitin、Tatiana V. Magdesieva、Vadim V. Minin、Alexey A. Sidorov、Joel S. Miller、Igor L. Eremenko
DOI:10.1016/j.poly.2017.08.005
日期:2017.11
in the form of 2 ·MeCN and 2 ·CH 2Cl2 solvates. Replacement of Li(Piv) with lithium trifluoroacetate Li(Tfac) (Tfac = CF 3 CO 2− ) results in the bimetallic compound [Li 2 (VO) 2 ( µ -Tfac) 6 (bpy) 2 ] ( 3 ). A similar reaction with lithium trichloroacetate, Li(Tcac) (Tcac = CCl 3 CO 2− ), in ethanol gives the mononuclear complex [VO(Tcac)(bpy) 2 ](OTf) ( 4 ). The structures of 1 – 4 were determined
Acid- and base-catalysed displacement of the carboxylate ligand from [Pt(dien)(RCO2)]+(dien = 1,5-diamino-3-azapentane; R = CH2Cl, CHCl2, or CCl3) in aqueous solution
作者:Luciano Canovese、Lucio Cattalani、Lucia Gemelli、Martin L. Tobe
DOI:10.1039/dt9880001049
日期:——
The kinetics of the displacement of the carboxylate ligand from [Pt(dien)(RCO2)]+(dien = 1,5-diamino-3-azapentane; R = CHCl2 or CCl3) have been studied and are compared with the data for R = CH2Cl. Although the intrinsic reactivity is very sensitive to the basicity of the leavinggroup, the nucleophilic discrimination is independent of the nature of the leavinggroup and is the same as that of [Pt(dien)Cl]+