Samarium(III) compounds supported by the hydrotris(3,5-dimethyl-pyrazolyl)borate ligand: Synthetic utility of the putative, reduction prone Sm(III)-hydrocarbyls, ' (TpMe2)2SmR '

Article abstract of DOI:10.1016/S0022-328X(01)00855-5

Addition of a stoichiometric amount of KR (R=CH₂C₆H₄-o-NMe₂, C₆H₄-o-CH₂NMe₂, CH₂C₆H₅) to a solution of Sm(Tp^Me2)₂Cl in toluene or THF led to the immediate formation of the insoluble, purple Sm(Tp^Me2)₂ compound. However, when these reactions are carried out in the presence of protic substrates such as HOPh, HCp, HCCPh, HOC₆H₂-2,4,6-^tBu₃, HNPh₂ and 3,5-Me₂pzH, the corresponding Sm(Tp^Me2)₂(Y) compounds (Y=OPh (1), CCPh (2), Cp (3), OC₆H₂-2,4,6-^tBu₃ (4), NPh₂ (5), 3,5-Me₂pz (6)) readily form and in good yields. The structures of 4-6 have been established by X-ray crystallography.