Transition ruthenium nitrides

There have been significant advances during the last decade in the synthesis of high specific surface area (Sg) carbides and nitrides of transition metals.1 2 This has naturally prompted interest in the application of these materials as catalysts. Carbides of molybdenum and tungsten received the most attention because they catalyze many reactions that typically occur on noble metals. In several reactions, molybdenum carbides show catalytic activity similar to that of ruthenium and surface reactivity of tungsten carbides resembles that of platinum.3-7... 

Iron and its compounds (carbide, nitride), as well as ruthenium, cobalt, rhodium, and molybdenum compounds (sulfide, carbide), are used most frequently to produce high-molecular-weight hydrocarbons. Iron can be prepared as a high-surface-area catalyst (==300 m /g) even without using a microporous oxide support. 7-AI2O3, Ti02, and silica are frequently used as supports of the dispersed transition-metal particles. Recently zeolites, as well as thorium oxide and lanthanum oxide, have... 

Ruthenium(VI) and Ruthenium (VI 11).—Following a preliminary report, full details have appeared of the preparation and properties of the new ruthenium(vi) terminal nitride complexes Cs2[Ru(N)X5] and R[Ru(N)X4] (X = Cl or Br R = Ph4As or Bu4N). The dipole transition moment has been calculated for the lowest energy ti 2e transition for RUO4, employing a... 

Although none of these metals form bulk nitrides, the transition metal-nitrogen bond energies are still significant. For ruthenium the surface bond strength (566 kJ mol" ) is not markedly lower than on iron (585 kJ mol" ) (Table 9.2) and even the inactive metals such as palladium have bond strengths of around... 

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