Keywords
carbazolide ligands
lanthanides
samarium
structure.
synthesis
η2-acetylene complexes
Abstract
The bis(carbazolide) complex of SmII, Sm[3,6-But2-1,8-(Me3SiC≡C)2Carb]2, was synthesized by the transamination reaction of Sm[N(SiMe3)2]2(THF)2 with two molar equivalents of carbazole 3,6-But2-1,8 (Me3SiC≡C)2CarbH. A similar reaction of the less sterically demanding carbazole 3,6-But2-1,8-(PhC≡C)2CarbH is accompanied by the oxidation of SmII to SmIII and lead to the formation of bis(carbazolide) amido complex [3,6-But2-1,8-(PhC≡C)2Carb]2Sm[N(SiMe3)2]. For both Sm complexes, η2-interactions with C≡C bonds, which are unconventional for LnII and LnIII metals, were experimentally confirmed by single-crystal X-ray diffraction, IR and Raman spectroscopy along with QTAIM analysis.
Funders
Russian Science Foundation
23-13-00323
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