Synthesis and Structure of Titanium(IV) Amido Complexes Containing C2-Symmetric Bis(sulfonamide) Ligands

Mixed-amido Ti(IV) compounds of the type Ti(NR‘ 2 ) 2 [N(SO 2 R)CHPhCHPhN(SO 2 R)] (R‘= Me, Et; R = p -C 6 H 4 CH 3, p -C 6 H 4 C(CH 3 ) 3, CF 3 ) were synthesized by the aminolysis of Ti(NR‘ 2 ) 4 with bis(sulfonamide) ligands 1a − c . The structure of compound 3b, determined by X-ray crystallography, indicates that one oxygen from a single SO 2 group binds to the metal center in the solid state, breaking the C 2 symmetry. These Ti−bis(sulfonamide) complexes, when treated with 2,6-dimethylphenol, generate putative Ti(OAr) 2 (bis(sulfonamide)) intermediates which display unorthodox disproportionation behavior.