Problem

The reaction of [Ti(CO)6]2- and chlorotriphenylmethane, Ph3CCl, results in rapid oxidati...

The reaction of [Ti(CO)₆]²^- and chlorotriphenylmethane, Ph₃CCl, results in rapid oxidation of [Ti(CO)₆]²^- to afford a trityltitanium tetracarbonyl complex (P. J. Fischer, K. A. Ahrendt, V. G. Young, Jr., J. E. Ellis, Organometallics, 1998, 17, 13). On the basis of the IR spectrum 1932, 1810 cm^-¹) acquired in tetrahydrofuran solution, shown next, is this complex expected to exhibit a square planar or a square pyramidal arrangement of four CO ligands bound to titanium? Does the spectrum rule out either of these possible geometries ?