Hydrazines metal complexes

Numerous explosives are based on hydrazine and its derivatives, including the simple azide, nitrate, perchlorate, and diperchlorate salts. These are sometimes dissolved in anhydrous hydrazine for propeUant appUcations or in mixtures with other explosives (207). Hydrazine transition-metal complexes of nitrates, azides, and perchlorates are primary explosives (208). 

The activation of persulfates by various reductant viz. metals, oxidizable metals, metal complexes, salts of various oxyacid of sulfur, hydroxylamine, hydrazine, thiol, polyhydric phenols, etc. has been reported [36-38]. Bertlett and Colman [39] investigated the effect of methanol on the decomposition of persulfates and proposed the following mechanism. 

Hydrazine, bis(allylthiocarbamido)-in gravimetry, 1, 534 liquid-liquid extraction, 1,546 Hydrazines, 2, 101 macrocyclic synthesis, 2,904 metal complexes, 2, 30 in plutonium extraction, 6, 948 Hydrazoic acid... 

A silver-containing solution was basified with sodium hydroxide, and after filtration, ammonia solution was used to wash residual silver from the filter. Hydrazine sulfate was then added to precipitate metallic silver and when the mixture was heated it exploded. This may have been caused by formation of silver nitride and/or hydrazine-silver complexes, both of which are explosively unstable. 

Hydrazine Nitrate Complexes. Salts of bivalent metals (Ni, Co, Zn, Cd and Mn) of complex hydrazine nitrates may be represented by the following formulas [M(N 2H4 )2 ] (N03 )2, or by [M(N2 H, )3 ] (N03 )2. In these complexes, called nitrohydrazinates, each N Ii, group plays the same role as two NH3 groups in the corresponding ammonium complexes... 

Figure 19 Pathways for the conversion of dinitrogen to ammonia or hydrazine at a mononuclear site, established from a series of mechanistic studies on simple metal complexes.

Fig. 3.23 The RS (left) and RR (right) diasteromers of binuclear metal complexes formed by hydrazine molecules and halogen atoms (metal green, nitrogen blue, and halogen yellow)...

Studies on model polynuclear catalytic systems have confirmed that for the catalytic reduction of dinitrogen under mild conditions, it is necessary to use a polynuclear transition metal complex capable of donating four electrons to form the hydrazine derivative. 

An example of a substituted hydrazine (1-) complex is Ge[N(Me)NMe2]4 which has a distorted tetrahedral structure complexes of other main group elements (as well as transition metal complexes) are known.179 An example of a NHNH2 species is Cp Me4W(T72-NHNH2).180... 

Originally devised as a method for the conversion of amino acids or amino acid esters to aldehydes. The Akabori reaction has been modihed for use in the determination of C-terminal amino acids by performing the reaction in the presence of hydrazine and for the production of derivatives useful for mass spectrometric identihcation. See Ambach, E. and Beck, W., Metal-complexes with biologically important ligands. 35. Nickel, cobalt, palladium, and platinum complexes with Schiff-bases of... 

The reactions of hydrazine with 22 transition-metal complexes (132)... 

Zeolite-supported transition metal complexes, such as Mn(III) porphyrin and Cu(II) tetraphenylporphyrin, have been used for the electrocatalytic oxidation of phenols and hydrazine, respectively [173]. Methylviologen-exchanged zeolites have... 

Solid-Supported Surface Catalysis by Metal Complexes. Hong et al. (1987a, b, in press) have prepared a variety of hybrid catalysts between Co(II) phthalocyanine complexes and the surfaces of silica gel, polystyrene-divinylben-zene, and Ti02 and tested these hybrids for catalytic activity with respect to the autoxidation of hydrogen sulfide, sulfur dioxide, 2-mercaptoethanol, cysteine, and hydrazine ... 

The vibrational spectra of hydroxylamine (NH>OH) complexes have been studied by Kharitonov el al. Sacconi and Sabatini reported the infrared spectra of hydrazine (NH2NH2) complexes of the type [M(N2H4)2Cl2], where M is a divalent metal, and assigned the MN stretching bands between 440... 

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