UTILIZATION OF CHEMICAL AND STRUCTURAL CHARACTERISTICS OF TETRAAZA CYCLOALKANE COMPLEXES

The research investigations aiming at taking advantage of the chemical and structural consequences of ligand macrocyclization are reviewed with regard to the three features as follows: (1) Tetraazacycloalkane complexes which take up carbon dioxide as ROCO 2 − or R 2 NCO 2 − ; (2) Correlation between axial and inplane coordination bond lengths in tetragonal six-coordinate complexes of trans-MX 2 N 4 -type (MyCo 3+ , Ni 2+ , and Zn 2+ )-X-ray structural and ab initio MO studies and (3) Stabilization of high oxidation states of metal ions and its application to chemistry of one-dimensional halogen-bridged M 2+ -M 4+ mixed valence complexes.