Arsine complexes rhenium

Oxo-rhenium complexes can catalyze various OAT reactions between suitable oxo-donors (XO = sulfoxides (R2SO) tertiary amine A-oxides (R3NO) pyridine A-oxide (C5H5NO, PyO) triphenyl-phosphine, -arsine, or -stilbene oxide (R3AO) (A = P, As, Sb) peroxides (Bn OOH, H2O2) ... 

The chemistry of technetium(II) and rhenium(II) is meagre and mainly confined to arsine and phosphine complexes. The best known of these are [MCl2(diars)2], obtained by reduction with hypophosphite and Sn respectively from the corresponding Tc and Re complexes, and in which the low oxidation state is presumably stabilized by n donation to the ligands. This oxidation state, however, is really best typified by manganese for which it is the most thoroughly studied and, in aqueous solution, by far the most... 

Complexity in the manganese and rhenium pentarbonyl halides substitution arises from the fact that these decompose in inert solvents to form the halogen-bridged dimers [M(CO)4X]2. Both monomers and dimers react with phosphines, arsines, pyridine, aniline etc. to give the disubstituted compounds M(CO)3XL2. Thus three final products or any mixture of them may be obtained, depending upon the precise reaction conditions... 

Rhenium(0) compounds are rare and frequently lie in the realm of the organometallic chemistry. A simple example is decacarbonyldirhenium(0) in which two staggered, square-pyramidal Re(CO)5 fragments are held together by a single rhenium-rhenium bond. Substitution of carbonyl ligands is possible by tertiary phosphines and arsines, silanes and isocyanides, and binuclear Re-Re, Mn-Re, and Co-Re complexes have been studied. " Successive replacement of CO ligands can readily be observed by vibrational spectroscopy. This has been demonstrated... 

Such complexes occur exclusively as derivatives of the rhenium(II) halides. The neutral, presumably octahedral, complexes ReX2(diars)2 and ReX2(qas) (X = Cl, Br or I diars = o-phenylene(bis-dimethylarsine) qas = tris(o-diphenylarsinophenyl)arsine) are formed by reduction of the corresponding cationic rhenium(III) species.2 The species ReX2(tas) (X = Cl, Br or I tas = bis(o-diph-enylarsinophenyl)phenylarsine) are prepared similarly but may be five-coordinate.2 The complex ReCl2(PMe2Ph)4 and some of its properties have been described (including its ESCA spectrum and electrochemical properties),11 but details of its preparation have not. 

Complexes of the type ReX4(LL) containing bidentate phosphine and arsine ligands have been prepared by two general methods. The halocarbon oxidation of the rhenium(III) complexes Re2(/<-... 

Rhenium(III) complexes, 143-164 cyanides, 143 alkyl isocyanides, 143 amides, 144 amidines, 146 amines, 144 arsines, 147 aryl isocyanides, 143 cyanates, 145 diazines, 144 diethyidicarbamato, 150 P-diketones, 149 dinitrogen, 144 N heterocycles, 144 nitriles, 146... 

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