The successive addition of ROH (R= CH 3 and C 2 H 5) to the dichloromethane solution of Mo v O (tpp) Br (tpp= meso-tetraphenylporphinato) causes two-step reactions at 25° C. The products of the first and the second step of the reactions are alcohol complex,[Mo v O (tpp)(ROH)] Br, and alkoxo complex, Mo v O (tpp) OR, respectively. In the presence of superoxide ion, O 2−, in the dichloromethane solution of Mo v O (tpp) X (X= Br and NCS) ...