Photographically useful chalcogenazoles, chalcogenazolines, and

Details Photographically useful chalcogenazoles, chalcogenazolines, and Photographically useful chalcogenazoles, chalcogenazolines, and

1984-10-12

1986-03-18

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

430428, 430434, 430446, 430586, 430598, 430614, 430600, 430564, 430584, 430585, 430587, 430588, 430589, 430582, 430583, 430590, 430592, 430593, 430594, 430940, 430517, 430522, 548100, G03C 134, G03C 128, G03C 102, G03C 524

Patent

active

045769052

ABSTRACT:
Compounds containing an aromatic ring portion fused with a tellurazolium or derivative tellurazole, tellurazoline (including tellurazolinylidene), or tellurazolinium ring portion are disclosed together with processes and intermediates for their preparation. With properly selected pendant groups these tellurazolium and derivative compounds can be usefully employed as dyes, antifoggants or stabilizers, nucleating agents, latent image keeping addenda, or speed or contrast altering addenda in silver halide photographic systems.

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Chem. Abst. vol. 100, 1984, 174729t (Mbuyi, et al.).
"Un Nouvel Heterocycle Tellure: le Benzisotellurazole-1,2", Campsteyn et al., Journal of Heterocyclic Chemistry, vol. 15, Aug. 1978, pp. 745-748.

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