Argentous ion

Unlike Mn(VII) chromic acid oxidises hydrogen only in the presence of a catalyst, namely, argentous ion . The stoichiometry is... 

Similarly, cobaltic and argentic ion have been generated by anodic oxidation of cobaltous and argentous ion, respectively, and used for the oxidation of methyl-substituted aromatic hydrocarbons to aldehydes 18a Electrogenerated mercuric ion can be used for the conversion of propene to acrolein 18al ... 

If ammonia is added, silver chloride dissolves in the form of the diammine-argentate ion ... 

Hydrazine sulphate (saturated) when added to a solution of diammine-argentate ions, forms finely divided silver metal, while gaseous nitrogen is evolving ... 

The simple argentic ion has been produced in concentrated nitric acid solution, but apart from the fluoride, Agp2, compounds of Ag(ii) can be prepared only in the... 

The argentic ion, Ag2 +, which is paramagnetic with an unpaired electron, is obtained in HC104 or HN03 solution by oxidation of Ag+ with ozone or by dissolution of AgO in acid. 

Kozutsumi, D. Kawashima, A. Adachi, M. Takami, M. Takemoto, N. Yonekubo, A. Determination of docosahex-aenoic acid in milk using affinity solid phase purification with argentous ions and modified thin layer chromatography. Inti. Dairy J. 2003,13 (12), 937-943. 

Sodium perbismuthate, NaBiOa, and argentic ion, Ag+++, have been shown to effect a-glycol cleavage 111)] they have been studied in some detail 112). 

Study of the solutions of monovalent ions [Anions, Argentous and Mercurous]... 

Because the retention times of the different TGs within a PN differ, it is important to collect the whole peak at fractionation. One total fractionation, with an elution time of ca. 1.5 h, will provide enough material for the subsequent separation procedure based on argentation-HPLC (utilizing silver ions in the mobile phase), in order to separate geometrical isomers. 

Metal Ion-Solute. Transition metals have been loaded onto classical LC columns and used for selective separations (21). More recently successful attempts have been made to control selectivity by metal additions directly to the mobile phase (22). This is a form of ion pairing, but the pairing agent is polar instead of hydrophobic. Silver ion has been used for the separation of olefins (23). M. deRuyter and A. deLeenheer have employed argentation chromatography to resolve difficult mixtures of Retinyl esters (24). 

Also in the 1930s, detailed studies about the thermodynamic stability of adducts of silver(I) with olefins were carried out by Howard Lucas and coworkers, who determined the equilibrium constants between the hydrated Ag+ ion and the corresponding cationic olefin silver(I) complex in dilute aqueous solutions of silver nitrate [25]. In the context of this work, Saul Winstein and Lucas made an initial attempt to describe the interaction between Ag+ and an olefin by quantum mechanics [26]. Assisted by Linus Pauling, they explained the existence of olefin silver(I) compounds in terms of resonance stabilization between the mesomeric forms shown in Fig. 7.4. Following this idea, Kenneth Pitzer proposed a side-on coordination of Ag+ to the olefin in 1945 and explained the stability of the corresponding 1 1 adducts as due to an argentated double bond , in analogy to his concept of the protonated double bond [27]. He postulated that the unoccupied s-orbital of silver(l) allowed the formation of a bond with the olefin, similar to the s-orbital of the proton. 

Silver nitrate solution white precipitate of silver cyanide, AgCN, readily soluble in excess of the cyanide solution forming the complex ion, dicyano-argentate(I) [Ag(CN)2] (cf. Section III.6, reaction 7) ... 

Argention.—Silver forms a colourless, univalent ion. Its electrochemical equivalent in milligrams per coulomb is given as 1-1172,10 1-1180,11 1-11827,12 1-11829,18 1-1188,14 and 1-1198.18 In the potential series the metal occupies a position intermediate between mercury and platinum. In correspondence with its low electroaffinity it exhibits a strong tendency to form complex ions. The ionic conductivity of silver at 18° C. is 54-0, and at 25° C. 63-4. 

Determination of Instability Constant.—Two methods have been mainly used for determining the instability constants of complex ions one involves the measurement of the e.m.f. s of suitable cells, which will be described in Chap. VII, and the other depends on solubility studies. The latter may be illustrated by reference to the silver-ammonia (argent-ammine) complex ion. If the formula of the complex is Agm(NH8)n , the... 

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