Platinum-nitrogen bond

Platinum nanoparticles, preparation, 12, 78 Platinum-nitrogen bonds, in platinacycles, 8, 508 Platinum-osmium carbonyl clusters, characteristics, 8, 420 Platinum-oxygen bonds, in platinacycles, 8, 505 Platinum particles, surface reactivity, 12, 542 Platinum-phosphorus bonds, in platinacycles, 8, 508 Platinum-rhenium carbonyl clusters, characteristics, 8, 420 Platinum(II)-ruthenium(II) binary complexes, preparation,... 

Unsaturated molecules readily insert into the platinum-nitrogen bond of Pt[Pg.105]

Almost all metal template-based syntheses of catenanes use Cu" ", but there are a few instances of other metal ion templates, including Zn +, Pd, and Pt +. The relative substitution-lability of Pd + makes it suitable as a preparative template the substitution-inertness of Pt + has been used as the basis for a temperature-switchable catenane molecular lock [257]. This mode of switching is based on platinum-nitrogen bond dissociation at elevated temperatures. 

Cenini S, Porta F, Pizzotti M, Crotti C (1985) Insertion of carbon dioxide, of C02-like molecules, and of other unsaturated compounds into the platinum-nitrogen bond of [Pt (PPh3)2(PhNO)]. J Chem Soc Dalton Trans 1 163-168... 

Hydrazones can be reduced to the hydrazine, and, if continued, hydrogenolysis of the nitrogen-nitrogen bond ensues. Raney nickel (14,15,31,133,134, 178,185), platinum (42,52,139,155,167), and rhodium (130) have each been... 

Palladium catalysts, mostly palladium on carbon and Pearlman s catalyst, are used for the hydrogenolysis of the benzyl—nitrogen bond. However, in some cases, platinum, nickel, and copper chromite catalysts have also been used. 

EMDE DEGRADATION. Modification of the Hofmann degradation method for reductive cleavage of the carbon-nitrogen bond by treatment of an alcoholic or aqueous solution of a quaternary ammonium halide with sodium amalgam. Also used as a catalytic method with palladium and platinum catalysts. The method succeeds with ring compounds not degraded by the Hofmann procedure. 

A different catalytic cycle for alkene hydroamination is initiated by the oxidative addition of the N-H bond to the metal, followed by insertion of the alkene into the metal-nitrogen bond and reductive elimination to form the amine. The oxidative addition of unactivated N-H bonds to platinum(O) complexes is thermodynamically unfavorable, so the catalytic cycle cannot be completed17, but the successful iridium(I)-catalyzed amination of norbornene with aniline has been reported18. 

The N-H bond is also capable of undergoing oxidative addition. Roundhill found that amines and imines undergo addition reaction with platinum complexes to form metal-nitrogen bonds 2°1. 

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