A cyclic tetramer of [Ag(1,4,7-trithiacyclononane)]⁺,cyclo-tetrakis(μ-1,4,7-trithiacyclononane-κ³S¹,S⁴,S⁷:κS¹)tetrasilver(I) tetrakis(trifluoromethanesulfonate) nitromethane disolvate

Abstract

(1,4,7-Trithiacyclononane)silver trifluoromethanesulfonate crystallizes in a tetrameric form from nitromethane, to give the title compound, [Ag(4)(C(6)H(12)S(3))(4)](CF(3)SO(3))(4) x 2CH(3)NO(2). The complex cation consists of four [AgL]+ units (L is 1,4,7-trithiacyclononane), with four Ag-S-Ag bridges forming a cyclic tetramer. The almost planar Ag(4)S(4) ring takes an octagonal form.

Endo- and Exocyclic Coordination of a 20-Membered N2O2S2-Macrocycle and Cascade Complexation of a 40-Membered N4O4S4-Macrocycle

“…Meanwhile, thiamacrocycles, including sulfur-containing mixed donor macrocycles, so often tend to form exocyclic complexes which demonstrate the metal coordination outside the cavity . We and other groups have reported a series of soft and hard/soft metal complexes of sulfur-containing mixed donor macrocycles with unusual stoichiometries and topologies. This has led us to explore the coordination chemistry of thiamacrocycle system, particularly with reference to the possible coordination modes of these macrocycles more precisely.…”

“…In this approach, it is understood that bischelating dithiamacrocycles rigidified with aromatic subunit(s) tend to show convergent or divergent exocoordination modes, which might lead the formation of discrete or continuous coordination species, respectively . Some thiaoxaaza-macrocycles also show a variety of coordination modes to the thiaphilic soft metals to generate diverse types of the products. , …”

A solvent stabilized cyclic dimer complex of platinum(II) with S2O2 macrocycle

“…The macrocyclic thioethers as building blocks in this area have the potential to afford the cyclic oligomer complexes to bind metal ions in exo-cyclic modes due to the presence of two set of lone pairs on the sulfur donors [6,7]. In fact, a number of cyclic oligomer silver (I) complexes with thiamacrocycles [8][9][10][11][12][13][14][15][16][17] in different composition such as dimeric, trimeric and tetrameric ones have been reported. We have investigated the self-assembly based on isomeric S 2 O 2 macrocycles including L 1 and L 2 as well as their analytical applications [18][19][20][21][22].…”