| abstract |
Novel pyrazolotriazole couplers containing a ballast group of formula (I):n n wherein: n n is 0, 1 or 2; n R² is hydrogen or a substituent; n B is hydrogen or a substituent; n L' is O, S, Se, Te, Si(R⁵)₂, NR⁵, PR⁵, P(O)(R⁵)₂ or NR⁵SO₂, wherein R⁵ is hydrogen, alkyl or aryl; and n R³ is a substituent, nare useful in photographic materials and processes. The couplers exhibit increased coupling activity, and provide formation of dyes having improved maximum magenta image dye density, contrast, and development speed when employed in color photographic materials and processes. |