Meso-ionic se- and s-containing tetrazoles

Details Meso-ionic se- and s-containing tetrazoles Meso-ionic se- and s-containing tetrazoles

1975-08-18

1977-01-18

Waddell, Frederick E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D25704

Patent

active

040039102

ABSTRACT:
This invention relates to meso-ionic tetrazole compounds of the formula: ##STR1## wherein X.sup.- is -S.sup.- or -Se.sup.- which are useful as photographic additives and to an intermediate useful in the preparation thereof having the formula: ##STR2##

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