Silver n

Complexes of SIlver(n).— The structures of two complexes of the d ion silver(ii) have been described. In both, the metal co-ordination is square-bipyramidal and reminiscent of that found in many complexes of the iso-electronic copper(ii) cation. The crystal structure of bis(pyridine-2,3-dicarboxylato)silver(n) dihydrate contains planar centrosymmetric [AgfCjHiNO,) ] units (108) in which the Ag-N and Ag-O bond lengths are respectively 2.12(1) and 2.13(1) A. An Ag - O contact of 2.98 A to a 

Bellon, F. Cariati, M. Manassero, L. Nddini, and M. Sansoni, Chem. Comm., 1971, 1423. 

Gold(iii) Complexes.—Reports on the structures of three such complexes have appeared in all the metal atom exhibits the expected square-planar co-ordination. 

In a brief communication the complex K[Au(CN) Cy,H20 is said to contain trans-dichlorodicyanoaurateCiu) complex anions. The compounds (110) and (111) are obtained by bromination of linear gold(i) complexes 

Mixed SiIver(i)-Gold(ni) Complexes.— The structure of the salt formed by the complex cation in (112) with the dibromoargentate(i) anion has been described. The gold(ni) co-ordination is square-planar, with Au-S distances of 2.357(8) and 2.324(8) A. The [AgBrj] species is linear, with a Ag-Br bond length of 2.450(5) A. i 

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Novel gold and silver N-heterocyclic carbenes, [3-(A-tcrt-butylacetamido)-l-(2-hydroxy-cyclohexyl)imidazol-2-ylidene]AgCl 157 and [3-(A-tcrt-butylacetamido)-... 

Valette-Silver, N., Hameedi, M.J., Efurd, D.W. and Robertson, A. (1999) Status of the contamination in sediments and biota from the western Beaufort Sea (Alaska). Marine Pollution Bulletin, 38(8), 702-22. 

Ammonium perchlorylamide, 4003 Barium A-perchlorylbenzylamide, 3642 Barium perchlorylamide, 0203 Mercury(II) /V-perchlory lben z y I a m i de, 3644 Monopotassium perchlorylamide, 3988 Potassium perchlorylamide, 4013 Silver N-perc h I ory I benzy I am ide, 2730 Silver perchlorylamide, 0028... 

Silver(n) and Silvery hi).—The cationic complex bis-(2,2, 2"-terpyridyl)Ag2+ has been isolated as its peroxydisulphate salt.217 The presence of a d-+d band at 15600 cm-1 is indicative of a six-co-ordinate ion. X-ray photoelectron spectra have provided Ag(3d5/2>3/2) binding energies for this complex and the mono-terpy complex. The influence of pyridine and 2-, 3-, and 4-picoline on bis(diethyl dithio-carbamato)AgH has been examined by e.s.r. spectroscopy.218 The results indicate formation of mono-addition products and the spin hamiltonian parameters for these complexes have been determined. 

Silver(n) complexes of the macrocyclic tetra-aza ligands (56) and (57) have been prepared by disproportionation of Ag1 in the presence of the ligand.219 Electrochemical or chemical oxidation with [NO]+ salts has yielded Agm complexes of... 

Li et al. reported that [3-diketones reacted with styrenes on treatment with silver triflate. The product structure suggested that such reactions proceeded through nucleophilic addition of the enol derived from (3-diketones to the silver n complex of styrene (Scheme 10.22).41... 

Several cycloadditions are known to be promoted by silver salts (see Chapter 2), driven by the Lewis acidity of silver ions. Probably more formal than true cycloadditions, such reactions forming C-C bonds are, indeed, often initiated by the Lewis acidity of silver ions, as revealed by the NMR observation of silver n coordination to siloxyalkynes (Scheme 10.67).106... 

Cirtii id C o ited SiLrfacc Silver N jnd Film CCA N ano-.sl ructure. ... 

Valette-Silver N. J. (1993) The use of sediment cores to reconstruct historical trends in contamination of esmarine and coastal sediments. Estuaries 16, 577-588. 

Valette-Silver, N.J. (1992) Historical reconstruction of contamination using sediment cores A review. NOAA Technical Memorandum NOS.ORCA 65, Rockville, Maryland. 

Silver(n) Compounds, d9.12 The Ag2+ ion is well defined and numerous complexes are known but only one binary compound, AgF2 the oxide, AgO, is actually Ag Agin02 and is accordingly discussed under Ag111. 

Silver(lll), ds, Compounds.12 Binary Compounds. A black oxide, that is not readily purified but is probably Ag203, is obtained by anodic oxidation of Ag+ in alkaline solution. The black so-called silver(n) oxide, which is... 

With other metals, such as nickel (19), palladium (32), platinum (45), antimony (46), and occasionally silver (47) and cobalt (48), the internal C-H bond is broken upon initial metalation. In the case of cobalt and silver N-confused porphyrins, the fully deprotonated adducts are always observed upon metalation, which are shown in Figure 5. In the case of these two metals, the macrocycle takes on different charges trianionic in the case of Ag(III) and dianionic in the case of the Co(III) PPha adduct. W-confused porphyrin can adopt multiple charges, as will be described below. In most of these complexes... 

Furans. Isomerization of allent (o give furan derivatives is catalyzed by Free-radical reactions. Silver n constitute an oxidizing system that dej reactive intermediates to radical acceptc acrylonitrile initiates synthetically useb oxidative degradation by (NHj).S.O, isocyanates in a biphasic system (11 exa... 

Initial concentiatioii T) for silver n for phenol rj calculated with equation (9-5)... 

TaUe 68 Spectral, Magnetic and Electrochemical Data for Silver(n) Tetraaza Macrocycles ... 

Silver(n) complexes, 839-850 amino adds, 846 aqua,844,850 biguanides, 849 2,2 -bipyridyl, 843 carboxylates, 844 cinchomeronic acid, 842 dipicolinic acid, 842 dithiocarbamates, 845 isodnchomcronic add, 842 isonicotinates, 840 lutidinic acid, 842 N-heterocyclic ligands, 839 nicotinates, 840 1,10-phenanthroline, 843 phthalocyanines, 848 picolinates, 840... 

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