Molybdenum complexes imides

Chen T, Sorasaenee KR, Wu Z, Diminnie JB, Xue Z (2003) Synthesis, characterization and X-ray structures of new molybdenum bis(imide) amide and silyl complexes. Inorg Chim Acta 345 113... 

Monomeric non-oxo molybdenum(V) complexes have been isolated with nitride (N3 ), imide (NR2-) and amide (NRR -) ligands, which may act as models for intermediates in the degradation of dinitrogen in nitrogenase. However, no molybdenum(V) compounds are yet known which correspond to the diazenide or hydrazide analogues of the molybdenum(IV) complexes described in Section 36.4.2.3. 

In contrast, molybdenum and iron diene complexes undergo the same type of reaction with chiral lithium imide enolates, with moderate to good induction at the p-position (eq 16). ... 

Diarylacetylenes are converted in 55-90% yields into a-diketones by refluxing for 2-7 h with thallium trinitrate in glyme solutions containing perchloric acid [413. Other oxidants capable of achieving the same oxidation are ozone [84], selenium dioxide [509], zinc dichromate [660], molybdenum peroxo complex with HMPA [534], potassium permanganate in buffered solutions [848, 856, 864,1117], zinc permanganate [898], osmium tetroxide with potassium chlorate [717], ruthenium tetroxide and sodium hypochlorite or periodate [938], dimethyl sulfoxide and iV-bromosuccin-imide [997], and iodosobenzene in the presence of a ruthenium catalyst [787] (equation 143). 

Transition metal complexes are used as catalysts and as reagents in the synthesis of imides. Molybdenum hexacarbonyl activates strained aziridines and allows the nucleophilic attack of caibanions. Intramolecular rearrangement and a final oxidation yields imides completely stereospecifically (equation 59).38> Dicobalt octacarbonyl catalyzes the conversion of 3,7-unsaturated amides to imides in the presence of carbon monoxide (equation 60). ... 

Molybdenum and Tungsten Imide Alkylidene Complexes as Efficient Olefin-Metathesis Catalysts Schrock. R.R. Hovevda. A.H. Angew. Chem. Int. Ed. 2003, 42,4592. 

Recent studies involving syntheses of homogeneous catalysts for amoxidation have begun.Chromium and molybdenum imide complexes [M(NBu02 (OSiMe3)2] have been utilized as model compounds. The reaction of such complexes with toluene and benzoyl peroxide affords PhCH = NBu ... 

Dinitrogen complexes of molybdenum and tungsten with mono-, di - and tii - tertiary phosphine co -ligands are electrosynthesised from molecular nitrogen andMo or precursors vw cleavage of halide or thiolate bonds and from Mo or oxide, imide or hydrazide complexes by... 

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