Bis(catecholato-κ(2) O,O′)bis­(dimethyl sulfoxide-κO)titanium(IV)

Bis(benzene-1,2-diolato-κ(2) O,O′)bis­(dimethyl sulfoxide-κO)titanium(IV), [Ti(C(6)H(4)O(2))(2)(C(2)H(6)OS)(2)], crystallizes with two crystallographically independent mol­ecules in the space group P2(1)/c emulating ortho­rhom­bic Pbca symmetry (β = 90.0445 (9)°]. The two mol­ecules are related by pseudo-glide symmetry, broken by modulation of each one catecholate and dimethyl sulfoxide (DMSO) ligand. Twinning by pseudomerohedry was observed [twin ratio 0.5499 (7):0.4401 (7)]. Complex 3 was obtained by heating of diprotonated titanium tris-catecholate precursor 2(H) in DMSO, by formal displacement of a catechol mol­ecule by two DMSO mol­ecules. Complex 3 is just the second heteroleptic, mono-nuclear, neutral bis-catecholate complex with TiO(6) metal coordination, the only other one being its bis-DMF analogue 6. The two mol­ecules of 3 exhibit a distorted octa­hedral geometry. The geometry and distortions from ideal symmetry of 3 are discussed and compared to 6 and to cationic tris-catecholate titanium complexes.