Metal hydrazine carboxylate M

Metal hydrazine carboxylates [M(N2H3COO)2-(N2H4)2] are prepared from aqueous solutions of metals salts with hydrazine carboxylic acid in hydrazine hydrate ... 

Similar to hydrazinium metal sulfates, hydrazinium metal sulfite complexes can be synthesized the procedure is, though, slightly different. Hydrazinium transition metal sulfite dihydrate complexes of the formula (N2H5)2M(S03)2(H20)2 where M = Fe, Co, Ni, Cu, and Zn are prepared from metal hydrazine carboxylates (described in Chapter 4) as the starting material. In this method, the anhydrous metal hydrazine carboxylate, M(N2H3C00)2, is added to distilled water previously saturated with sulfur dioxide gas. The complex decomposes with the liberation of carbon... 

Patil, K.C. and Seker, M.M.A. (1994) Synthesis, structure and reactivity of metal hydrazine carboxylates combustible precursors to fine particle oxide materials. International Journal of Self-Propagating High-Temperature Synthesis, 3, 181-196. 

Thermal analysis of metal hydrazine carboxylate hydrate complexes, M(N2H3C00)2 cH20, initially shows an endotherm due to the loss of water of hydration. This is followed by exothermic decomposition of the anhydrous salts through carbonate intermediates to the corresponding oxides, similar to anhydrous metal hydrazine carboxylates (Figure 4.3). The TG (thermogravimetry) and DTA data of some of metal hydrazine carboxylate hydrates are summarized in Table 4.3. 

When solutions containing isomorphous (identical crystal structures and sizes) metal ions undergo crystallization they form a new solid, resulting in solid solutions. Metal hydrazine carboxylate hydrates combine with lead to form a solid solution of lead hydroxy hydrazine carboxylate complex. Lead hydroxy metal hydrazine carboxylate hydrates of the type PbM0(0H)2(N2H3C00)2-xH20, where M = Zr and Ti, are prepared by the reaction of the corresponding ions in aqueous solutions with hydrazine carboxylic acid and ammonia [13,14] ... 

Metal Ion Doped Metal Hydrazine Carboxylate Hydrates - M +/M(N2H3C00)2-xH20... 

METAL HYDRAZINE CARBOXYLATE HYDRAZINES - M(N2H3COO)2 (N2H4)2... 

The reaction between metal thiocyanates and hydrazinium thiocyanates cannot be used to prepare hydrazinium metal thiocyanate complexes. Consequently, an alternate method is employed, namely, the decomposition of hydrazinium metal hydrazine carboxylates with dilute thiocyanic acid (<5%) [27,28]. Hydrazinium metal hydrazine carboxylates complexes N2H5M(N2H3C00)3 H20, where M = Co and Ni, are prepared from metal nitrates, sulfates, or chlorides and hydrazine hydrate saturated with carbon dioxide. The dilute thiocyanic acid is prepared by adding barium thiocyanate trihydrate to dilute sulfuric acid. 

Analogous to the synthesis method adopted for the preparation of hydrazinium metal sulfite hydrates, hydrazinium lanthanide sulfite hydrates, N2H5Ln(S03)2(H20)2, can be synthesized by the addition of hydrazine sulfite monohydrate to the respective anhydrous lanthanide hydrazine carboxylates M(N2H3COO)2 [10]. 

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