DICYCLOPENTADIENYLTITANIUM(IV) PYRIDINE-2,6-DICARBOXYLATE COMPLEXES, SYNTHESIS AND STRUCTURAL CHARACTERIZATION AS PENTACOORDINATE TITANOCENE DERIVATIVES

Article abstract of DOI:10.1016/0022-328X(86)80296-0

Reaction of (C5H5)2Ti(CH3)2 or (CH3)4C2(C5H4)2Ti(CH3)2 with pyridine-2,6-dicarboxylic acid (dipicolinic acid) yields titanocene dipicolinate derivatives.The molecular structure of (C5H5)2Ti dipicolinate is that of an axially symmetric, pentacoordinate titanocene derivative with two carboxyl oxygen atoms and the pyridine nitrogen atom as ligating atoms.Two identical chelate bite angles of only 71 deg make the dipicolinate ligand particularly suited to form a remarkably stable titanocene derivative with unprecedented pentacoordinate geometry.