Hydrazine nickel

Complex 61 is also accessible from the 2-nitrophenyl isocyanide complex 68 by reduction of the nitro group with Sn/HCl. Incomplete reduction of the nitro group in 68 with Raney-Nickel/hydrazine yields, after intramolecular cyclization, the complex 70 with the NH,NOH-stabilized benzimidazolin-2-ylidene ligand. Complex 69 with the 2-hydoxylamin-substituted phenyl isocyanide ligand presumably occurs as an intermediate in this reaction. The alkylation of both the NH,NH- and the NH, NOH-stabilized NHC ligands in 67 and 70, respectively, proceeds readily (Fig. 23) [184, 185]. 

The 4-aryl- and 4-arylalkylamino-1,2,3-benzotriazines (122) are considerably more resistant to Raney nickel/hydrazine than the imino... 

The reduction of carbazole nitro groups to the primary amines is straightforward stannous chloride, tin-hydrochloric acid, iron-hydrochloric acid" hydrogen-palladium/charcoal," hydrogen-nickel,hydrazine-palladium,and hydrazine-nickeP have all been employed. 3,6-Dichloro-l,8-dinitrocarbazole was partially reduced with sodium hydrogen sulfide to give l-amino-8-nitro-3,6-dichloro-carbazole. ... 

The detonator is considered as the first fire-device of key importance in any explosive train and contains a small quantity of a very sensitive explosive as a means of initiation of inorganic salts of weak acids, that is, M F, LA and LS. However, they all suffer from some shortcoming and are not eco-friendly. In order to overcome these shortcomings of the existing initiatories, use of nickel hydrazine nitrate (NHN) [ Ni(N2H4)3 (N03)2], which has better storage stability and is also eco-friendly, has been reported in the literature [262, 263]. 

Hariharanath, B., Chandrabhanu, K.S., Rajendran, A.G., Ravindran, M., and Kartha, C.B. (2003) Detonator using nickel hydrazine nitrate an energetic coordination compound as a primary explosive. Proc. 4th Inti. High Energy Materials Conf. and Exhibit, Pune, India, 18-20 Nov., p. 19. 

Trihydrazine Nickel (II) Nitrate. See in Vol 8, N26-R under Nickel-Hydrazine Nitrate Com-... 

M) + pyrrolidine gave a mixture (10 1) of pyrrolidine enamine, mp lOB-1100 (MeOH), and H.N-dimethylenamine (5 hr reflux, 97% yield) which, on reduction (Raney nickel-hydrazine), gave the indole (93% yield). 

When the required 1,2-diaminoarencs are not readily available it is often possible to utilize o-nitroanilines as substitutes. They can be successively reduced or hydrogenated and then cyclized [82, 91, 133], or the cyclization and reduction processes can be combined. Suitable reducing agents are triethyl phosphite, iron pentacarbonyl, titanium(III) chloride, Raney nickel-hydrazine, palladium-carbon, bisulfite or dithionitc, and metal-acid [54, 134,135]. Thus, 4,5-dimethyl 2-nitroaniline heated at 90"C (1 h) with formic acid and sodium dithionitc gives 5,6-dimethyIbenzimidazolc in 92% yield [136]. 

Ring-opened products were isolated when the following 1,2,3-benzotriazines were reduced 2-aryl-l,2,3-benzotriazinium betaines 1 (tin/hydrochloric acid),258 357 l,2,3-benzotriazin-4-amines 2 (Raney nickel/hydrazine),358 l,2,3-benzotriazin-4(3//)-imincs 3 (Raney nickel/hydrazine),358 2-alkyl-4-imino-l,2,3-benzotriazinium betaines 4,359 1,2,3-benzotriazine 3-oxides 5 and 3,4-di-hydro-l,2,3-benzotriazines 6 (sodium/ethanol).360... 

Zahlreiche Triazine sind auf diese Weise gespalten worden, wobei sich in erster Linie die Transferhydrierung mit Raney-Nickel/Hydrazin-Hydrat bewahrt hat. Bei der Hydrierung von 2-Methyl-2H-(naphtho-[ 1,8-d,e]-triazin zu 1,8-Diamino-naphthalin (81% d.Th.) iiber Palladium/Kohle wurde Mcthylamin als Spaltprodukt nachgewiesen1 ... 

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