Ammonium zincate

Mitra, P. Khan, J. 2006. Chemical deposition of ZnO films from ammonium zincate bath. Mater. Chem. Phys. 98 279-284. 

Complexation with zinc effectively separates the C3S5 dianion from the trithiocarbonate ion in high yield, and the material obtained is sufficiently pure for further reactions. The quaternary ammonium zincate salt is alkylated slowly but smoothly by many halides at room temperature in solvents such as acetone or tetrahydrofuran. Reaction of the zincate with benzoyl chloride followed by cleavage of the resulting benzoate by sodium ethoxide in ethanol provides the much more reactive species NajCaSs. The sodium salt is, however, very air sensitive,5 whereas the zinc salt is completely stable. 

The zinc ion Zn(H20)4 is a rolciless ion formed by solution of zinc in acid. It is poisonous to uian. and to bacteria, and is used as a disinfectant. It forms tetracomdmated complexes readily, such as Zn(NH d4+ b Zn(CN)r, and Zr (OH)4" ". The while precipitate of zinc hydroxide, Zn(OH)2, whidi foirn. when ammonium hydroxide is added to a solution containing zinc ion, dissolves ill excess ammonium hydroxide, forming the zinc ammonia complex. The zinc hydroxide complex, Zn(OH), which is called zincate ion, is similarly formed on solution of zinc hydroxide in an excess of strong base zinc hydroxide is amphoteric. 

Species which decrease the quantity of Mg(OH)2 precipitated upon the addition of NaOH, sueh as ammonium salts, and anions which precipitate Mg (e.g., phosphate), interfere in the Titan Yellow method. A number of metal cations decrease or increase the colour intensity. Decreased absorbance in the presence of Al, Zn, or Sn(IV) is believed result from adsorption of aluminate, zincate or stannate ions on the Mg(OH)2, which reduces the amount of dye adsorbed. 

Zinc Ammonium Chloride Ammonium Pentachloro- Zincate Ammonium Zinc Chloride ... 

Ammonium zinc edetate Diammonium ( N,N -ethyl-enebis(N-(carboxylatomethyl)glycinato))(4-)-N,N, 0, 0, ON,ON )zincate(2-) EINECS 267-40CI-7 (Ethylene-dinitrilo)tetraacetato zincate(2-), diammonium salt Glycine, N,N -1,2-ethanediylbis(N-carboxy-methyl)-, diammonium zinc salt Zincate(2-), N,N -1,2-ethanediylbls(N-(carboxymethyl)glycinato))(4-)-N,N, 0,0, ON,ON )-, diammonium, (006-21)... 

There have been reviews of the early work on direct dissolution (73,74). The efforts to dissolve cellulose directly as a base using phosphoric, sulfuric, and nitric protonic acids, or zinc chloride, thiocyanates, iodides, and bromides as Lewis acids are recorded (73,74). With regard to cellulose acting as an acid, sodium zincate, hydrazine, and sodium hydroxide are listed as inorganic solvents, and quaternary ammonium hydroxides, amines, dimethylamine-DMSO mixtures, and... 

C2 6H3 8ClaFe2N20Zn, Ferrocenylmethyl(dimethyl)ammonium tetrachloro-zincate monohydrate, 37B, 463... 

An aqueous precursorfor 0.75Pb(Zni/3- Nb2/3)O3-0.25BaTiOs solid solution was synthesized by Van Werde et al. (2001). They used acetates of lead and zinc, and Nb(V) peroxocitrato complex. The solution of lead zincate niobate was prepared by adding the compounds into aqueous solution of ammonium citrate. The aqueous solution was stable when pH was higher than 8 and the citrate acid/cation mole ratio was higher than 1.5. The aqueous precursor for barium titanate was prepared by using titanium(IV) peroxocitrato complex and barium acetate. They found that the solid solution of PZN and BT is crystallized as a perovskite phase at temperatures as low as 800°C. 

When the ammonium chloride electrolyte is replaced by a potassium hydroxide solution, the result is what is known as an alkaline manganese battery. The electrolyte solution (which is, of course, held in an absorbing medium) contains enough zincate ions to suppress open circuit dissolution of the zinc. The cell reaction is... 

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