New functions of (arene)tricarbonylchromium(0) complexes as hydrogenation catalysts: stereospecific semihydrogenation of alkynes and highly chemoselective hydrogenation of .alpha.,.beta.-unsaturated carbonyl compounds
New functions of (arene)tricarbonylchromium(0) complexes as hydrogenation catalysts: stereospecific semihydrogenation of alkynes and highly chemoselective hydrogenation of .alpha.,.beta.-unsaturated carbonyl compounds
New functions of (arene)tricarbonylchromium(0) complexes as hydrogenation catalysts: stereospecific semihydrogenation of alkynes and highly chemoselective hydrogenation of .alpha.,.beta.-unsaturated carbonyl compounds