Diazene-transition metal complexes

The relative instability of free diazenes (215) often precludes the direct reaction of these species with transition metal complexes. However azobenzene reacts with Ni° (264) species to yield materials such as [Ni(tBuNC)2(PhN2Ph)] (140, 265). Similarly, ditolyldiazene reacts with [Ni(cyclooctadiene)2] in the presence of tritolylphosphine to give [Ni(N2Ar2)(PAr3)2] (Ar = p-CH3C6H4) (200). 

Recent Developments in Theoretical Organometallic Chemistry. 15, I Redistribution Equilibria of Organometallic Compounds, 6, 171 Redistribution Reactions of Transition Metal Organometallic Complexes, 23, 9S Redistribution Reactions on Silicon Catalyzed by Transition Metal Complexes, 19, 213 Remarkable Features of (7] -Conjugated Diene) zirconocene and -hafnocene Complexes, 24, I Selectivity Control in Nickel-Catalyzed Olefln Oligomerization, 17, lOS Silyl. Germyl, and Stannyl Derivatives of Azenes. N H Part I. Derivatives of Diazene, N,H2, 23, 131... 

Westemacher, S. Kisch, H. (1996) Transition-metal complexes of diazenes. 36. Formation of indoles from azobenzene and diphenylacetylene through supported aqueous-phase catalysis by Rh(l) complexes, Monatsh. Chem., 127,469-73. 

Complexation and activation of diazenes and diazo compounds by transition metals. A. Albini and H. Kirsch, Top. Curr. Chem., 1976, 65,106-145 (119). 

Albini, A., and Kisch, H. Complexation and Activation of Diazenes and Diazo Compounds by Transition Metals. 65,105-145 (1976). 

Mdssbauer spectra of bonding and structure in, 15 184-187 reactions with diborane, 16 213 stabilization of, 5 17, 18-19 cyanates, 17 297, 298 cyanide complexes of, 8 143-144 cyclometallated bipyridine complex, 30 76 diazene complexes, 27 231-232 dinitrogen complexes, 27 215, 217 diphosphine complexes of, 14 208-219 dithiocarbamates, 23 253-254 -1,2-dithiolene complexes, 22 323-327 hydrogen bonding, 22 327 halide complexes with phosphine, etc., 6 25 hexaflouride, structure, 27 104 hydride complexes, 20 235, 248-281, see also Transition metal-hydride complexes... 

The reaction of phenylhydrazine with copper(II) chloride in aqueous solution gives [Cu4Cl4(PhNNH)] (13) and the reactions of 1,2-disubsti-tuted hydrazines with copper(II) salts give complexes such as [Cu2-Cl2(MeNNMe)l (46, 142). The reaction of substituted hydrazines (or lithiated, substituted hydrazines) with halido complexes of the transition metals can yield diazene complexes. Complexes of Ni, Pd, Pt (147, 199,213), and Rh (209) have been prepared in this manner [Eq. (25)]. 

The reaction of transition metal oxo complexes with substituted hy-drazines yields the diazene complexes, containing the M—NRNC(R)0 chelate. 

Complexation and Activation of Diazenes and Diazo Compounds by Transition Metals... 

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