SYNTHESIS OF CHIRAL AND C-2-SYMMETRICAL IRON(II) AND COBALT(II) COMPLEXES BEARING A NEW TETRADENTATE AMINE LIGAND SYSTEM

A synthesis for the new tetrapodal ligands dimethyl-N,N'-di(quinoline- 2-methyl)]-1,2-ethylene diamine (L(1)) (3a) and [N,N'-di-benzyl-N,N'-d i(quinoline-2-methyl)]-1,2 diamine (L(2)) (3b) and for the related oct ahedral complexes (L(1,2))FeCl2 (6a and 6b) and (L(1,2))CoCl2 (7a and 7b) is given. The solid state structures of 3b and 6a have been determ ined. Three different modes are possible for a tetradentate coordinati on of L(1,2) to FeCl2 or CoCl2. In 6a the ligand adopts a single chira l geometry around the Cl-Fe-Cl plane.