Oblon, Spivak, McClelland, Maier & Neustadt
Disazo metal chelate compounds for optical recording media
 A metal chelate compound of a dis-azo compound represented by the following formula (I) with a metal: ##STR1## (wherein A is a residue forming a heterocyclic ring together with the carbon atom and the nitrogen atom to which it is bonded, X is a residue forming an aromatic group together with the two carbon atoms to which it is bonded, and D is an aromatic residue which may have a substituent, or a heterocyclic amine residue which may have a substituent, and Y is a group having active hydrogen) and an optical recording medium having a recording layer provided on a substrate so that information can be written in and/or read out by a laser, wherein the recording layer contains a metal chelate compound of the dis-azo compound represented by the above formula (I), with a metal. 
Mitsubishi Kasei Corporation
G G G C C C G G G C
G11B G11B G11B C09B C09B C09B G11B G11B G11B C09B
additional additional inventional inventional inventional inventional inventional additional additional inventional
Tetsuo Shuichi Masako Takumi Satoru
Murayama Maeda Takeuchi Nagao Imamura