Synthesen und Strukturen der Lithiumtitanate(III) und ‐(IV), (py)2Li[(py)2Ti(OPh)4] und (py)2Li[(py)Ti(OPh)5]

Syntheses and Structures of the Lithiumtitanates(III)/(IV) (py)2Li[(py)2Ti(OPh)4] and (py)2Li[(py)Ti(OPh)5]The new lithiumtitanates (py)2Li[(py)2Ti(OPh)4] (1) and (py)2Li[(py)Ti(OPh)5] (2) have been obtained from the reaction of titaniumtrichloride (respectively titaniumtetrachloride 2) with LiOPh in the presence of the base pyridine (py). The crystal structures of both compounds show that the titanium atoms are in the centres of distorted octahedral coordination figures. In compound 1, four oxygen and two nitrogen atoms (in cis orientation) are bonded to titanium, whereas in 2, five oxygen and one nitrogen atom form the coordination polyeder around titanium. In both compounds, the lithium atoms are attached through phenolate bridges to the octahedra. The titanate (py)2Li[(py)2Ti(OPh)4] (1) has a single absorption band in the visible region of the UV‐spectrum showing a shoulder shifted to the bathochromic region, due to the Jahn‐Teller‐effect for d1‐systems.