The coordination chemistry of the hydrotris(3-diphenylmethylpyrazol-1-yl)borate (TpCHPh2) ligand

Abstract

The new ligand, hydrotris[3-(diphenylmethyl)pyrazol-1-yl]borate, Tp^CHPh₂, has been synthesized and its coordination chemistry was compared with that of the analogous Tp^iPr. The new ligand was converted to a variety of complexes, such as M[Tp^CHPh₂]X (M = Co, Ni, Zn; X = Cl, NCO, NCS), Pd[Tp^CHPh₂][η³-methallyl], Co[Tp^CHPh₂](acac), and Co[Tp^CHPh₂](scorpionate ligand). Compounds Tl[Tp^CHPh₂], 1, Co[Tp^CHPh₂]Cl, 2, Co[Tp^CHPh₂](NCS)(DMF), 3, Ni[Tp^CHPh₂](NCS)(DMF)₂, 4, Co[Tp^CHPh₂](acac), 5, Co[Tp^CHPh₂][Ph₂Bp], 6, Co[Tp^CHPh₂][Bp^Ph], 7, Co[Tp^CHPh₂][Tp], 8, and (Ni[Tp^CHPh₂])₂[C₂O₄](H₂O)₂, 9, were structurally characterized.