Nitrido binuclear

The binuclear complex [Mo2Cl2N2o] features a terminal nitrido ligand, N=, as well as terminal and bridging azido ligands, i.e. [ (MoCl(N)(t, -N,)2(/t,t -Nt)l2] Concatenations larger than N3 are rare. The planar bridging N4... 

The formation of the unsaturated intermediate Run(OEP) from the hydrido-complex RumH(OEP) is supposed to occur from a LMCT excited state. As a consequence, the dimeric [RuH(OEP)]2 with a metal-metal interaction is formed [245]. Irradiation of some systems containing Fein(Por)N3 leads to p-nitrido bridged binuclear mixed-valence complexes [(Por)Fem-N-Fe,v(Por)] [134, 162], In both cases photochemistry was used as a conventional preparative route for synthesis of the binuclear complexes. 

A new class of binuclear nitrido complexes of tetravalent osmium and ruthenium is described in which the metal atoms are symmetrically bridged by a nitride ligand to give a linear M-N—M unit They have the stoichiometries M2NX8(H20)2]3 and [M2N(NH3)8Y2]3+ (M = Os, Ru X = Cl, Br Y = Cl, Br, etc.). Studies are reported on their vibrational spectra, structures, and bonding. Preliminary studies are reported also on trinuclear complexes of osmium and iridium. Finally, the use of vibrational spectroscopy in the study of metal-nitrido and metal-oxo complexes is discussed briefly. 

Table III. Binuclear Osmium and Ruthenium Nitrido Complexes...

Scheme 11 Preparation of nitrido-bridged binuclear complexes 344...

Complexes of the (ra s-lTcO(OH)] and [TCO2] Cores Oxo-Bridged (Tc203l and Other Binuclear Complexes [TcSl Complexes Nitrido Complexes Imido and Hydrazido Complexes Complexes Not Containing Multiply Bonded Ligands... 

Mononuclear and binuclear calixarene-supported nitrido complexes have been prepared ((117), (118) Scheme 32).198,199 These species are discussed in Section 4.5.2.2.4 in the context of N2 activation. 

Two iron porphyrins may be bridged through a single bridging atom X to form a binuclear metalloporphyrin of the type (P)Fe-X-Fe(P), and the electrochemistry of these compounds where X = O, N, or C has been recently reviewed [7j. The formal oxidation states of the two iron atoms are 4-3 for the /t-oxo complexes, 4-3.5 for the /t-nitrido compounds and... 

---