Hydrazinium sulfate

Hydrated and anhydrous chromium(II) hydrazinium sulfates (N2H5)2Cr(S04)2 are known. They are air-stable, and in the latter (from isomorphism with the Zn11 complex) each metal ion is coordinated to the nitrogen atoms of two hydrazinium ions and four 6 atoms of bridging sulfato anions.135... 

J. Goslar, W. Hilczer and P. Morawski, Low-temperature dynamics of hydrazinium ions in lithium hydrazinium sulfate (LHS) studied by electron spin echo (ESE) technique. Solid State Ionics, 2000,127, 67-72. 

R. R. Knispel and H. E. Petch, Proton rotating frame relaxation in lithium hydrazinium sulfate, Li... 

Silver nitrate AgNO, hydrazinium sulfate N HftS04, aqueous aininonia. Experimental Procedure... 

A few mL of 0.1 mol/L AgN03 solution are placed in the flask, w hich must be completely free of grease. Aqueous aiiimoiua is added until the white precipitate of Ag2() formed initially just rcdissolves. A large dash of saturated hydrazinium sulfate solution is added the flask is swirled rapidly and at the same time heated a little in the gas flame. The silver mirror is deposited on the inner wall of the flask (colored figure 4). 

Synonyms Diamidogen sulfate Diamine sulfate Hydrazine hydrogen sulfate Hydrazine monosulfate Hydrazine sulfate (1 1) Hydrazinium sulfate Hydrazonium sulfate... 

Hydrazinium sulfate. See Hydrazine sulfate Hydrazinobenzene. See Phenyl hydrazine Hydrazinobis [3-(3,5-di-t-butyl-4-hydroxyphenyl) propionate]... 

Schmidt, V.H., Drumheller. Dielectric properties of lithium hydrazinium sulfate. Phys. Rev. B., 4, 4582-4597, 1971. 

It was found that a slight negative error inherent in the O2-H2 coulometer could be eliminated by substituting electrolysis of hydrazinium sulfate to give H2 and N2 (17). J. E. Fagel, Jr., in the author s laboratory (18), found that increased sensitivity could be obtained with the use of a slightly modified Warburg monometer a displacement of 1 cm in the manometer corresponded to 0.05 coulomb, or about 6 x 10 milliequivalent of chemical action. 

The inline conversion of nitrate to nitrite and subsequent spectrophotometric determination after diazotization and coupling reactions is the basis of an important set of analytical methods for the simultaneous determination of both ions. Either homogeneous (titanium(III) chloride, hydrazinium sulfate, etc.) or heterogeneous (zinc, cadmium, amalgamated cadmium, copperized cadmium, etc.) reduction agents, photochemical or enzymatic reactions have been used [157]. The nitrite so produced is determined through spectrophotometric detection of the reddish purple azo dye formed as a result of the modihed Griess chemistry. 

Alternatively to heterogeneous reduction a flow method which incorporates hydrazinium sulfate as homogeneous reductant can be used [170,171] (Figure 7.46). 

This is where the original and new methods diverge. In the original method, the solution is transferred to a beaker, made up to 200 mL with demineralised water and then precipitated as Agl under reduced light with silver nitrate. However, in the new method, an additional clean-up step has been introduced where the solution in the drechsel bottle is made up to 100 mL with IM HNO3 (50 mL). The pH is tested and adjusted to be between 6 and 8, before leaving the solution for 1 hour after the addition of O.IM hydrazinium sulfate (10 mL) in order to reduce all the iodine to iodide. 

The sulfate ion (S04 ), though a simple dianionic ligand, exhibits a rather flexible symmetry and variable mode of binding with metal ions in the crystalline state. Interest in metal sulfate interactions with the hydra-zinium cation arises from the fact that these compounds exhibit one- and three-dimensional magnetic interactions of a linear-chain antiferromag-net. Dihydrazinium sulfate forms a series of double sulfates with divalent and trivalent cation that are well crystallized and, in a few instances, are even less soluble than hydrazinium sulfate itself. The most easily prepared double sulfates are those of Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd, Li, Mg, Al, La, Ce, Pr, Nd, and Sm. These salts are similar to the ammonium alums obtained with some metal sulfates. In contrast to the ammonium double salts, the hydrazinium metal sulfates of first row transition elements and lithium crystallize without water, whereas the lighter lanthanides and aluminum form hydrated salts. 

The compound N2H5Nd(S04)2-H20 is also prepared by isothermal evaporation ( 50°C) of an aqueous solution containing neodymium sulfate and hydrazinium sulfate in a molar ratio of 1 3. Efforts to readily prepare the corresponding sulfates of heavier elements (Eu to Lu) by this method have been unsuccessful due to the separation of starting materials. 

Similar to hydrazine hydrate, a good reducing agent, other inorganic salts like hydrazinium sulfate and hydrazinium halides are also used as reducing... 

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