Abstract: A photographic element containing a dye which when released from a coupler has a sufficiently low pKa, generally less than about 5, such that the dye remains substantially or fully ionized during coating of the film and in the produced film, results in an element containing a dye which has the desired hue without the use of additional additives, such as mordants, to keep the dye ionized. The dye is also useful in photographic elements without release from a coupler, for example, as a filter dye.

Abstract: A method is disclosed for developing an image in a photographic element comprising a support, a silver halide emulsion containing an imagewise distribution of developable silver halide grains, and a blocked photographically useful compound comprising a photographically useful group and a blocking group capable of releasing the photographically useful group upon processing the photographic element in the presence of a peroxide, wherein the blocking group comprises an electrophilic group which is solely capable of undergoing a nucleophilic displacement reaction, the electrophilic group being bonded directly or through a releasable timing group to the photographically useful group, with the proviso that when the photographically useful group is a development inhibitor, the blocking group is bonded to the photographically useful group through at least one releasable timing group. The method comprises the step of contacting the photographic element with a processing solution comprising a peroxide.

Abstract: A process for functionalizing methane comprising:(a) reacting methane with a hydridoalkyl metal complex of the formula:CpIr[P(R.sub.1).sub.3 ]H(R.sub.2)wherein Cp represents a cyclopentadienyl or alkylcyclopentadienyl radical having from 1 to 5 carbon atoms;Ir represents an iridium atom;P represents a phosphorus atom;R.sub.1 represents an alkyl group;R.sub.2 represents an alkyl group having at least two carbon atoms; andH represents a hydrogen atom, in the presence of a liquid alkane R.sub.3 H having at least three carbon atoms to form a hydridomethyl complex of the formula:CpIr[P(R.sub.1).sub.3 ]HMewhere Me represents a methyl radical.(b) reacting said hydridomethyl complex with an organic halogenating agent such as a tetrahalomethane or a haloform of the formulas:CX'X"X'"X"" or CHX'X"X'";wherein X', X", X"', and X"" represent halogens selected from bromine, iodine and chlorine, to halomethyl complex of step (a) having the formula:CpIr[P(R.sub.1).sub.