The tris[3-(9-anthryl)pyrazol-1-yl]hydroborato ligand, [TpAnt]: Compositional disorder between a vacancy and a chain of three atoms

A new tris(pyrazolyl)hydroborato ligand with anthryl susbtituents in the 3-position, tris[3-(9-anthryl)pyrazol-1-yl]hydroborate, [TpAnt], has been synthesized by the reaction of KBH4 with 3-(9-anthryl)pyrazole and characterized as the thallium derivative, Tl[TpAnt]. The thallium reagent was used to prepare the cobalt and molybdenum derivatives, [TpAnt]CoNCS and [TpAnt]Mo(CO)2(η3-CH2C(Me)CH2). The molecular structure of [TpAnt]CoNCS, contaminated with ca6% Tl[TpAnt], has been determined by X-ray diffraction, thereby providing an example of compositional disorder between a vacancy and a chain of three atoms.