Silver I Salts

Addition of an alkali hydroxide to a solution of a silver(I) salt gives a brown solid, silver(I) oxide, AgjO when wet, this behaves as silver hydroxide AgOH, for example... 

If a bromomethyl- or vinyl-substituted cyclopropane carbon atom bears a hydroxy group, the homoallyiic rearrangement leads preferentially to cyclobutanone derivatives (J. Sa-laun, 1974). Addition of amines to cydopropanone (N. J. Turro, 1966) yields S-lactams after successive treatment with tert-butyl hypochlorite and silver(I) salts (H.H. Wasserman, 1975). For intramolecular cyclopropane formation see section 1.16. 

Fig. 8. Tetrameric 24 and 25 and polymeric 26 complexes between silver(I) salts and bis (1 -imidazolyl)borates...

In 1986, Dukat and Naumann reported a surprisingly stable silver(m) ion, [Ag(CF3)4], in the form of a mixed silver(i)-silver(m) salt AgI[Agin(CF3)4] 166.221 It was formed upon the facile disproportionation reaction of the silver(i) complex, [Ag(CF3)2], prepared in situ from the treatment of silver(i) salts like silver(i) nitrate or silver(i) acetate with [Cd(CF3)2], according to Equations (2) and (3). 

Z)-Tribenzo[12]annulene is transformed into the isomeric [4+2]-cycloadduct upon reaction with AuCl in dichloro-methane. No AuCl complex could be isolated. With copper(i) and silver(i) salts, stable 7r-complexes are obtained.315... 

Alternate names Argentum, argentum crede Cl 77820, shell silver, silver atom, silvercolloidal, silflake, silpowder, silber Lunar caustic fused silver nitrate, molded silver nitrate argenti, nitras, nitric acid silver (I) salt, nitric acid silver (1+) salt, silver (1+) nitrate... 

The use of methanol or ethanol as solvent (or sometimes the molecule of water resulting from the spontaneous dehydration) often leads to the isolation of a Fischer-type alkoxy- or hydroxy-carbene [M]=C(OR)CH=CR R instead of the desired allenylidene. Addition of nucleophiles to allenylidenes dominates the reactivity of these electrophilic groups (see below). Nevertheless, in some cases, the use of silver (I) salts Ag[X] (X = PFg, TfO, BF4 ) results in a more practical and flexible synthetic method since the use of nucleophilic polar solvents can be avoided. 

Challis, B. C., and Outram, J. R. (1978). Rapid formation of N-nitrosamines from nitric oxide in the presence of silver (I) salts. J. Cfiem. Soc., Chem. Commun., 707-708. 

Silver(I) Salts. Which silver salts dissolve well in water ... 

Iodofluorination and bromofluorination of alkenes are also effected in hydrogen fluoride systems by using bromine or iodine with an equivalent amount of silver(I) nitrate. In some cases, iodofluorination can also be achieved by iodine without adding the silver(I) salt, as illustrated in the following procedure. 

IR and Raman studies of some diammine silver(I) salts and their deuterated derivatives have been reported.30,31 Characteristic absorption bands are given in Tables 4 and 5. 

Table 5 Observed Frequencies (cm-1) in the IR Spectra of some Diammine Silver(I) Salts and...

The stability of silver(I) salts of piperidine and alkylpiperidines has been reported.56 Formation constants (log /32) were in the range 3.8-7.7 (Table 11). 

Table U Formation Constants of some Silver(I) Salts of Piperidine and Alkylpiperidines (25 °C, / = 0.5 M KN03)56...

The first silver(I) poly(pyrazolyl)borate complexes were reported in 1975.150 Since then, a number of silver complexes of the type Ag(L)(R B(pz)4 ) have been isolated and characterized.151,152 They were prepared by the reaction of the poly(pyrazolyl)borate anions with silver(I) salts, usually the nitrate, in the presence of donor ligands, L, and were isolated as white, thermally stable compounds. In most cases they were either insoluble, or at best only sparingly soluble, in common organic solvents. 

Little information is available concerning the reaction of oximes with silver(I) salts.165 syn-Phenyl-2-pyridylketoxime (syn-PhC(=NOH)C5H5N HPPK) has been reported to react with silver nitrate in ethanol-water to form Ag(HPPK)2N03 (white salt, m.p. 190-191 °C). On the basis of IR and electronic spectra it was concluded that the structure was linear with only the pyridyl N atoms being bound to the Ag+ ion.166... 

Dialkyl and diaryl thioethers generally react with silver(I) salts to form 1 1 complexes.309,310 Few data are available for these adducts however, on the basis of formation constants they appear to have relatively high stability (Table 44).311,312... 

Silver(I) halides are undoubtedly the best known of all silver(I) salts and the ability of the silver ion to form sparingly soluble precipitates with halide ions has been applied to their quantitative determination for many years. 

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