| 摘要 |
NEW MATERIAL:A nickel complex expressed by formula I (R represents H, alkyl, alkoxy or halogen; n is 1 or 2). EXAMPLE:(Dithiobenzil)-1,2-(dicyanoethylenethiolate)-Ni(II) complex. USE:An optical recording medium effective in preventing deterioration of light- resistance and reproducibility. PREPARATION:A compound expressed by formula II (A represents counter cation) is oxidized to afford the compound expressed by formula I. The compound expressed by formula II can be produced by reacting a benzoin derivative or benzil derivative with phosphorus pentasulfide, followed by hydrolysis and addition of a transition metal compound such as nickel chloride to form a bis-(dithiobenzil derivative)metal complex, which is then reflexed with a bis-(cis-1,2-dicyano-1,2-ethylenedithiolate)metal complex onium salt in a solvent to carry out ligand-converting reaction. |
