Turning a New Leaf on Metal-TMC Chemistry: Ni<sup>II</sup>(TMC) Acetylides
作者:Sarah F. Tyler、Sean N. Natoli、Bess Vlaisavljevich、Phillip E. Fanwick、Tong Ren
DOI:10.1021/acs.inorgchem.5b01883
日期:2015.10.19
Novel [Ni(TMC)C CY](+)-type compounds 1-4 [TMC = 1,4,8,11-tetramethy1-1,4,8,11-tetraazacyclotetradecane; Y = SiMe3 (1), (SiPr3)-Pr-i (2), Ph (3), and C2H (4)] have been synthesized and characterized. Single-crystal X-ray diffraction studies revealed that these compounds adopt a distorted squarepyramidal geometry, with the acetylide ligand occupying the apical position and a RSRS isomer for the TMC ligand. The room temperature magnetic properties of 1-4 are consistent with an S = 1 ground state, as corroborated by CASSCF and density functional theory calculations, which indicate that the singly occupied molecular orbitals are d(z)(2) and d(x2-y2).