Palladium miscellaneous complexes

Miscellaneous Methods of Preparing Phosphines. Palladium-catalysed formation of phosphorus-carbon bonds continues to be developed as a useful route to organophosphines. The reactions of primary or secondary phosphines with aryl- or vinyl-halides in the presence of a palladium catalyst, usually palladium acetate or a zerovalent palladium-phosphine complex, have been used in the synthesis of steroidal phosphines, e.g., (128), the cationic diphosphine system... 

The effects of temperature and cathode material and the use of aluminium electrodes on the electrolysis of phosphonium salts have been studied. Miscellaneous. Patent specifications have appeared for the convenient resolution of tertiary phosphines by complexation with the asymmetric palladium(n) complex (20). 

Miscellaneous. Rates of palladium-carbene complex formation in reaction (2) depend on solvent nature, increasing in the order acetone dioxan < 1,2-dichloro-... 

Arasabenzene, with chromium, 5, 339 Arcyriacyanin A, via Heck couplings, 11, 320 Arduengo-type carbenes with titanium(IV), 4, 366 with vanadium, 5, 10 (Arene(chromium carbonyls analytical applications, 5, 261 benzyl cation stabilization, 5, 245 biomedical applications, 5, 260 chiral, as asymmetric catalysis ligands, 5, 241 chromatographic separation, 5, 239 cine and tele nucleophilic substitutions, 5, 236 kinetic and mechanistic studies, 5, 257 liquid crystalline behaviour, 5, 262 lithiations and electrophile reactions, 5, 236 as main polymer chain unit, 5, 251 mass spectroscopic studies, 5, 256 miscellaneous compounds, 5, 258 NMR studies, 5, 255 palladium coupling, 5, 239 polymer-bound complexes, 5, 250 spectroscopic studies, 5, 256 X-ray data analysis, 5, 257... 

Miscellaneous. Hynes and Moran have carried out kinetic studies on substitution reactions of Pt dithiolate complexes with CN and with several dithiolate ions. In the reactions with the bidentate ligands the mechanism is similar to that proposed for the corresponding reactions of the nickel and palladium complexes, and the order of reactivities is Ni Pd Pt = 10 10 1. Evidence for an unusual mechanism in some reactions of Pt complexes has been reported in the case of the process... 

Miscellaneous Oxidation Reactions. The kinetic resolution of secondary alcohols is achieved by a palladium-catalyzed enan-tioselective oxidation using Pd[(—)-sparteine]Br2/(—(-sparteine or Pd(CH3CN)2(Br)2/chiral diamine sparteine mimic under an oxygen atmosphere. The chiral amine-dibromide complexes are observed to oxidize secondary alcohols more rapidly than the dichloride complexes (eq 7). This has been attributed to a greater counterion distortion from ideal square planar geometry, which could lower the energy barrier to 8-hydride elimination. 

Miscellaneous. Palladium catalysts have been applied in the carbonlyation of nitroarenes and amines (eq 9). It has been demonstrated that Pd(OAc)2 complexes containing phenanthroline and CO are readily able to insert into nitroarenes. However, when the analogous complexes with Pd(OPiv)2 were prepared, these proved to be too unstable for any synthetic applications. ... 

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