Substituted benzenedithiol metal complex

A process for preparing a substituted benzenedithiol metal complex represented by the general formula (1):

• ##STR41## wherein R is the same as in the general formula (2);
• M is a transition metal;
• and A.sup.+ is a quaternary ammonium group, the process comprising the steps of:
• reacting 3,4-dibromobenzenesulfonyl chloride with a compound selected from the group consisting of compounds represented by the general formulae (a), (b), (c) and (d) to synthesize a 4-substituted sulfonyl-1,2-dibromobenzene represented by the general formula (2):
• ##STR42## (wherein R.sup.1 is an alkyl group having 1 to 4 carbon atoms), ##STR43## (wherein n is 3, 4 or 5), ##STR44## (wherein R.sup.2 is one of a hydrogen atom and a substitutent having 1 to 4 carbon atoms), ##STR45## wherein R is an organic group selected from the group consisting of organic groups represented by the formulae (i), (ii), (iii) and (iv):
• ##STR46## (wherein R.sup.1 is an alkyl group having 1 to 4 carbon atoms), ##STR47## (wherein n is 3, 4 or 5), ##STR48## (wherein R.sup.2 is one of a hydrogen atom and a substituent having 1 to 4 carbon atoms);
• converting the 4-substituted sulfonyl-1,2-dibromobenzene into a 4-substituted sulfonyl-1,2-benzenedithiol represented by the general formula (3):
• ##STR49## wherein R is the same as in the general formula (2);
• and reacting the 4-substituted sulfonyl-1,2-benzenedithiol with a salt of the transition metal and a salt of the quaternary ammonium.

A process for preparing a substituted benzenedithiol metal complex represented by the general formula (1):

• ##STR50## wherein M is a transition metal;
• A.sup.+ is a quaternary ammonium group;
• and R is an aryl group represented by the formula (iv):
• ##STR51## (wherein R.sup.2 is one of a hydrogen atom and a substitutent having 1 to 4 carbon atoms), the process comprising the steps of:
• preparing a solution by dissolving 3,4-dibromobenzenesulfonyl chloride in a compound represented by the formula (d):
• ##STR52## wherein R.sup.2 is one of a hydrogen atom and a substituent having 1 to 4 carbon atoms;
• adding aluminum chloride to the solution and reacting 3,4-dibromobenzenesulfonyl chloride with the compound represented by the general formula (d) to synthesize 4-arylsulfonyl-1,2-dibromobenzene;
• converting the 4-arylsulfonyl-1,2-dibromobenzene into 4-arylsulfonyl-1,2-benzenedithiol;
• and
• reacting the 4-arylsulfonyl-1,2-benzenedithiol with a salt of the transition metal and a salt of the quaternary ammonium.

A process for preparing a substituted benzenedithiol metal complex represented by the general formula (1):

• ##STR53## wherein R is the same as in the general formula (3);
• M is a transition metal;
• and A.sup.+ is a quaternary ammonium group, the process comprising the step of reacting a substituted benzenedithiol compound represented by the general formula (3) with a salt of the transition metal and a salt of the quaternary ammonium:
• ##STR54## wherein R is an organic group selected from the group consisting of organic groups represented by the formulae (i), (ii), (iii) and (iv):
• ##STR55## (wherein R.sup.1 is an alkyl group having 1 to 4 carbon atoms), ##STR56## (wherein n is 3, 4 or 5), ##STR57## (wherein R.sup.2 is one of a hydrogen atom and a substitutent having 1 to 4 carbon atoms).

A composition comprising a substituted benzenedithiol metal complex represented by the general formula (1) as a singlet oxygen quencher:

• ##STR58## wherein M is a transition metal;
• A.sup.+ is a quaternary ammonium group;
• and R is an organic group selected from the group consisting of organic groups represented by the formulae (i), (ii), (iii) and (iv):
• ##STR59## (wherein R.sup.1 is an alkyl group having 1 to 4 carbon atoms), ##STR60## (wherein n is 3, 4 or 5), ##STR61## (wherein R.sup.2 is one of a hydrogen atom and a substituent having 1 to 4 carbon atoms;
• and an indolenine cyanine dye.

An optical data recording medium comprising a substituted benzenedithiol metal complex represented by the general formula (1):

• ##STR62## wherein M is a transition metal;
• A.sup.+ is a quaternary ammonium group;
• and R is an organic group selected from the group consisting of organic groups represented by the formulae (i), (ii), (iii) and (iv):
• ##STR63## (wherein R.sup.1 is an alkyl group having 1 to 4 carbon atoms), ##STR64## (wherein n is 3, 4 or 5), ##STR65## (wherein R.sup.2 is one of a hydrogen atom and a substituent having 1 to 4 carbon atoms).