Rhenium, hydride compound

Reaction of the rhenium hydride complex ReH7(PR3)2 (where R = Ph or p-tol) with Au(PPh3)N03 has yielded the heteronuclear cluster compounds [Au5Re(H)4(PR3)2(PPh3)5](PF6)2 (148) in which the metal cores are based on edge-shared bitetrahedra with the rhenium atom at one of the two most-connected vertices. This is illustrated in Fig. 24. A... 

Treatment of an ethereal solution of lithiated bis(7r-cyclopenta-dienyl)rhenium hydride, (C5H4Li)oReH, with an excess of methyl iodide yields a rather unstable yellow compound of composition CisHmRe (125). The infrared and NMR spectra indicate that the complex is (methylcyclopentadiene)(cyclopentadienyl)dimethylrhenium for which the structure (48) has been deduced by X-ray analysis (5). The methyl-... 

On treating the compound (CsHslaReH, which has been mentioned earlier, with carbon monoxide at 90° and 250 atm it is possible to obtain the carbonyl (C6H5)2ReH(CO)2, which has neither acidic nor basic properties (8 ). It sublimes at 90-100°, melts at 111-112°, and is freely soluble in all the usual solvents such as benzene, ether, petroleum ether, and acetone. Unlike cyclopentadienyl rhenium hydride, it is stable in air. 

Synthesis and reactivity of hydrogen-rich uranium-rhenium compounds have been reported. The tris(cyclopenta-dienyl)uranium-rhenium hydride complexes [(CsFI4R)3UF[6Re(PPh3)2] (R=H, Buc, SiMe3) were prepared according to Scheme 87.175... 

Abrahams SC, Ginsberg AP, Knox K (1964) Transition metal-hydrogen compounds. II. The crystal and molecular structure of potassium rhenium hydride, K2ReH9. Inorg Chem 3 558-567. doi 10.1021Ac50014a026... 

Analogously, the Rhenium hydride H4Re4(CO)i2 with 56 electrons is also an unsaturated species. Two double bonds delocalized in a tetrahedral structure as shown in following resonance structures should agree with the relatively symmetric structure found for that compound (see Table 2.3). 

Compounds of the formulas Re(CR]), ReO(CH3)4, Li2[Re2(CH3)g] [60975-25-9], Re02(CH3)3 [56090-011-8], and Re03CH3 [70197-13-6] have been prepared. The first two compounds were obtained from reaction of rhenium hahdes or oxyhahdes and methyllithium the last three were formed from the species by oxidation or reduction reactions. The use of these hydride and alkyl complexes as catalysts is under investigation. 

Silicon and germanium hydrides react with cobalt, manganese and rhenium carbonyls affording complexes having a silicon (or germanium)-metal bond. These reactions, described previously for inactive compounds have been used in the synthesis of optically active silyl and germyl-transition metals ... 

The classic Hieber-base reaction 16 is that of a hydroxide with metal carbonyls, which proceeds by nucleophilic attack of the hydroxide at a carbon atom of a carbonyl ligand to give a carboxy group or consequently carbon dioxide and a metal hydride.17 Metal carbonyls are catalysts for the water-gas shift reaction.18 Pentacarbonyl(tetrafluoroborato)rhenium reacts with alkali hydroxide in a similar way however, due to the coordinatively unsaturated nature of the [Re(CO)5]+ group polynuclear compounds are formed.15... 

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