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 derivatives 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.
本发明涉及含有芳香环部分与
碲唑或衍生
碲唑、
碲唑啉(包括
碲唑啉基)或
碲唑啉环部分融合的化合物,以及它们的制备过程和中间体。通过选择适当的挂链基团,这些
碲唑及其衍
生物化合物可以被有用地应用于
银卤化物摄影系统中,作为
染料、抗雾剂或稳定剂、成核剂、潜影保持添加剂、速度或对比度改变添加剂。