Synthesis, characterization and molecular structure of titanium alkoxide complexes with aromatic oxime ligands

Synthesis, Structures, and Photocurrent Responses of Polyoxo-Titanium Clusters with Oxime Ligands: From Ti4 to Ti18

“…According to the literature, inert synthesis conditions dominate the solid-state isolation of oximate derivatives of titanium alkoxides. ,, As a result, most of the products turn out to be monomer ([Ti­(O i Pr) 2 {bis­(salicylaldiminate)}]), dimer [Ti­(O i Pr) 2 (benzaldoximate) 2 ] 2 , trimer (Ti 3 (salicylaldoxime) 2 (O i Pr) 8 ), or tetramer ([Ti 4 (O i Pr) 8 (ONCMeCH 2 CMeNO) 4 ]) . Upon slow diffusion of water after two months, Schubert et al successfully obtained three partially hydrolyzed derivatives, Ti 4 O 2 (O i Pr) 8 (ONCMeCH 2 CMeNO) 2 , Ti 6 O 6 (O i Pr) 6 (L3) 6 , and Ti 6 O 6 (OBu) 6 (ONC 5 H 8 ) 6 .…”

“…To a great extent, diverse coordination modes of oximes from side-on to end-on to bridging meet steric demand toward maximum stability. − The use of oximes in late transition metal coordination compounds has been intensively investigated, while less attention has been paid to oximate derivatives of earlier transition metals . Although a number of reactions of oximes with titanium species have been reported between the late 1960s and early 1980s, few publications with precise structure information are found. − Since then, more research work on molecular structure, new binding modes, and chemical modification were published. − It is worth mentioning that Schubert and co-workers have contributed much in this area. In 2009, they reported a dozen ketoximate derivatives of titanium alkoxides .…”