Silver complex compounds structure

Ti in [Ti(> 2-Cl04)4] and Ni" in [Ni(>j -C104)L2] where L is a chiral bidenlate organic ligand.Sometimes both and modes occur in the same compound. The biden-latc bridging mode occurs in the silver complex [Ag /x,>j -00(0)20- (m-xylene)2]- The structure of appropriate segments of some of these compounds arc in Fig. 17.23. The distinction between coordinated and non-coordinaied ( ionic ) perchlorate is sometimes hard to make and there is an almost continuous... 

Other polydentate ligands are polyamines and related ligands. Stability constants of silver(I) complexes with polyamines in dimethyl sulfoxide,419 A-methyl-substituted 4-methyldiethylene-triamines,420 or ethylene- or N- or C-methylated ethylenediamine in aqueous solution have been reported.421 The structure of the silver 1,3-diaminopropane complex, [Ag NH2(CH2)3NH2 ]-C104,422 and complex formation with 1,4-diaminobutane and 1,5-diaminopentane have been reported.423 A dinuclear silver(I) compound with ethylenediamine [(enH)Ag(en)Ag(enH)2]4+ has... 

Compound [25] was thus shown to have an unusual affinity for Ag+ cations. X-ray crystallographic determination of the structures of the free ligand, sodium and silver complexes were carried out and are shown in Fig. 17. The Ag-Fe distance in the silver complex of [25] is only 3.37 A, whereas the Na-Fe distance in the sodium complex is 4.39 A. This evidence together with the FAB MS data and UV spectroscopic data suggests that there may be an interaction between the silver cation and the iron present in the ferrocene moiety. 

Other coordination modes in pseudohalide complexes are comparatively rare. Amongst them, we note the structure of complex [AgLSCN] 0.25L (L = bipy), in which two silver ions are simultaneously bound with N atoms from NCS groups [166], The pseudohalide complexes with simultaneous different kinds of coordination of the NCS group are also rare. In particular, the complex compound [CuL(HL)2][Cu(L)(SCN)(p-NCS)], where LH is 2-dimethylaminoethanol, contains within its coordination sphere both kinds S-terminal (108) and -bridge (109) thiocyanate groups [178],... 

Silver carboxylate compounds are fight-sensitive and generally insoluble in most solvents, making it difficult for their structural characterization. In contrast, the zwitteri-onic betaine ligands R3N+(CH2) C02 form stable silver complexes that are soluble in water and ethanol, and a variety of discrete dimers or polymeric chain/network stractures constracted by the linkage of dimeric subunits have been obtained. ... 

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