Y. Ohyama
1952
Citations
0
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Journal
Bulletin of the Chemical Society of Japan
Abstract
S-Alkyl-(I) and N-alkyl-derivatives (II) of 1-thiol-benzthiazole are prepared and tested as additions for silver chloride emulsions, and compared with previously reported S-alkylderivatives (III) of 2-thiol-benzimidazole. Properties of these substances as additions may differ according to alkyl radicals substituted, positions of substitution and their parent substances. (1) Most of these compounds (I, II and III) show blue-black developing property which can not be seen in parent substances. This effect is the weakest in (I) and the strongest in (II), and as a whole, being the substituent methyl, ethyl or allyl, its activity rises in turn. Benzyl derivatives of them are almost inactive and carboxymethyl derivatives of (I) and (III) are inactive. (2) As for the fog-preventing property, (II) and (III) have greater activity and increase activity as the number of carbon atoms in the substituent increases. (I) is not so active as (II) or (III) regardless of its substituents. (3) It is remrakable that (II) has ...