Journal of Organometallic Chemistry p. 208 - 213 (2018)
Update date:2022-08-17
Topics:
Islam, Mohammad Jahirul
Smith, Mark D.
Peryshkov, Dmitry V.
The novel 2,6-bis(carborane)pyridine (C5H3N)(C2B10H11)2 ligand precursor containing two icosahedral carborane clusters attached to the pyridine ring was synthesized by the SNAr reaction between 2,6-difluoropyridine and lithiated ortho-carborane LiC2B10H11. Lithiation of the proligand at carbon atoms of carborane cages and the subsequent reaction with Ni(PPh3)2Cl2 afforded the square-planar Ni(II) pincer complex {(C5H3N)(C2B10H10)2}Ni(CH3CN). X-ray single crystal diffraction revealed extreme steric hindrance around the metal center in the complex imposed by two carboranyl groups in the rigid pincer-type framework, which was also manifested by the high value of the ligand buried volume %Vbur = 70.6%. The title pincer complex {(C5H3N)(C2B10H10)2}Ni(CH3CN) was found to be a competent catalyst for nucleophilic addition of piperidine to acetonitrile.
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