Azide complexes, iron carbonyl

Phenyl isocyanate or phenyl azide and iron carbonyls combine to form an unusual complex of possible structure (XXVII). 

In 1987, Nitta reported the formation of an unexpected vinylketene complex from the reaction of an azido-substituted cyclopropene with diiron nonacarbonyl.104 They had previously investigated the chemical behavior of the complexed nitrene intermediates that result from the reaction of organic azides and iron carbonyls113 and were interested in replicating the thermal isomerization of 3-azido-l,2,3-triphenylcyclopropene (163) into 4,5,6-triphenyl-l,2,3-triazine using a metal carbonyl-promoted re-... 

The decomposition of methyl azide in the presence of di-iron nona-carbonyl has been described briefly . The principal product of this decomposition was the complex (385), in addition to a 20% yield of... 

Sulphonyl azides are decomposed by Fe2(CO)g at room temperature or by Fe(CO)5 at 80° in non-polar non-protic solvents such as benzene or cyclohexane to give novel stable complexes having the probable structure (406) (or the cyclic dimer) in which all the carbonyl groups on iron have been displaced . 

While the adducts formed by urea with metal salts are generally oxygen bonded,an interesting series of urylene (RNC(=0)NR) complexes with metal-nitrogen bonding have been isolated by the reactons of metal carbonyls (iron, rhodium and iridium), with organic azides (RNj R = Me, Bu", Ph) or isocyanate (RNCO R = Me, Bu", Ph). 

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