Ligands of transition metal catalysts are classified into three types. L type: two electrons are supplied from a ligand to the central metal X type: one electron from the ligand and the central metal form a covalent bond Z type: the ligand receives two electrons from the central metal Most ligands are classified into L type and X type, and examples of Z type ligand are few, and catalytic reaction utilizing a complex having Z type ligand has hardly been reported. Therefore, we have focused on the development of new reactivity featuring Z type ligands.