Hydrido complexes tungsten

F,MnO SC6, Manganese( I), pentacarbonyl-(trifluoromethanesulfonato)-, 26 114 F,0 CH, Acetic acid, trifluoro-tungsten complex, 26 222 F,02C,H, Acetic acid, trifluoro-ruthenium complex, 26 254 FjOjSCH, Methanesulfonic acid, trifluoro-iridium, manganese and rhenium complexes, 26 114, 115, 120 platinum complex, 26 126 F304PtSC,4H,5, Platinum(II), hydrido-(methanol)bis(triethylphosphine)-Irans-, trifluoromethanesulfonate,... 

H, Hydrogen, molybdenum complex, 27 3 tungsten complex, 27 6, 7 H2AUF5OP5RUC73HJ0, Ruthenium(l+), carbonyl-di-p-hydrido-tris(triphenyl-phosphine)[(triphenylphos-phine)gold]-, hexafluorophos-phate(l-), 29 281... 

The electrosynthesis of hydride complexes directly from molecular hydrogen at atmospheric pressure by reduction of Mo(II) and W(II) tertiary phosphine precursors in moderate yield has been described as also the electrosynthesis of trihydride complexes of these metals by reduction of M(IV) dihydride precursors [101,102]. Hydrogen evolution at the active site of molybdenum nitrogenases [103] is intimately linked with biological nitrogen fixation and the electrochemistry of certain well-defined mononuclear molybdenum and tungsten hydrido species has been discussed in this context [104,105]. 

Transition metal hydrides are clearly an important class of metal complexes, and a number of books and review articles have appeared during the last 15 years. Hydrido complexes of tungsten contain in addition to the hydride such ligands as C5H5, phosphine, NO and CO. 

Some examples have been reported of tethered r 6-arene complexes of molyb-denum(II) and tungsten(II) that incorporate oxygen as the auxiliary donor atom.37 40 Reaction of neat 2,6-diphenylphenol with [MH4(PMePh2)4] (M = Mo, W) at 150 °C gives the tethered hydrido(aryloxo)metal(II) complexes 30 and 31.36 A metal-hydride bond is probably first cleaved by the phenolic oxygen with loss of H2 coordination of the pendant arene then induces loss of another equivalent of H2. 

Hydrido complexes, gold-osmium, 27 209 iridium, 26 117, 27 19 iron, 26 244, 27 168 iron-tungsten, 26 336 manganese, 26 226 mercury-molybdenum-ruthenium,... 

The first known r -dihydrogen complexes, so-called non-classical hydrido complexes, were the molybdenum and tungsten compounds, M(CO)3(PR3)2(ti -H2) (M = Mo, W R = /-Pr) isolated for the first time by Kubas [35]. In order for the... 

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