Exploration of heterometallic systems containing silver(I) in acyclic Schiff base ligands: Finite and infinite self-assemblies as a result of silver(I)–carbon bond and silver(I)⋯silver(I) interaction
作者:Arpita Biswas、Suraj Mondal、Leena Mandal、Arpita Jana、Priyanka Chakraborty、Sasankasekhar Mohanta
DOI:10.1016/j.ica.2014.01.045
日期:2014.4
The work in this report describes the syntheses and crystal structures of nine copper(II)-silver(I) compounds derived from some single-compartment N(imine)(2)O(phenoxo)(2) or double-compartment N(imine)(2)O(phenoxo)(2)-O(phenoxo)(2)O(methoxy/ethoxy)(2) acyclic Schiff base ligands. The nine compounds are [Cu-II(ClO4)(Lsal-enAgI)}(2)Cu-II(ClO4)(Lsal-enAgI)(H2O)}](n) (1), [(CuLsal-pnAgI)-L-II(ClO4)](n) (2), [(CuLsal-pnAgI)-L-II(NO3)}(2)] (3), [((CuLacpn-en)-L-II)(2)Ag-I(MeCN)(2)](ClO4) (4), [(CuLOMe-enAgI)-L-II(NO3)}(2)] (5), [(CuLOMe-pnAgI)-L-II(NO3)}(2)] (6), [(CuLOMe-pnAgI)-L-II(NO3)}(2)]center dot 2H(2)O (7), [(CuLOEt-enAgI)-L-II(NO3)}(2)] (8) and [(CuLOEt-opAgI)-L-II(MeOH)}(2)](ClO4)(2) (9), where the superscripts in the ligand symbols mean the following: (i) sal, acpn, OMe and OEt indicate that the aldehyde counterpart is salicylaldehyde, 2-hydroxyacetophenone, 3-methoxysalicylaldehyde and 3-ethoxysalicylaldehyde, respectively; (ii) en, pn and op indicate that the diamine counterpart is ethylenediamine, 1,3-diaminopropane and o-phenylenediamine, respectively. Copper(II) in all these compounds occupies a N2O2 compartment and the two phenoxo oxygen atoms in all cases bridge one copper(II) and one silver(I) centers. Compound 4 is a trinuclear (CuAgCuII)-Ag-II-Cu-I system. Compounds 3 and 5-9 are dimer-of-dinuclear compounds, in which the dimerization takes place due to interdinuclear Cu-O(nitrate) and Ag center dot center dot center dot Ag interactions in 3, 5 and 6 and due to Ag-pi (eta(1)-/eta(2)-) bonds in 7-9. Compounds 2 and 1 are one-dimensional coordination polymers due to Ag-pi (eta(2)-)/Ag-pi (eta(3)-) bonds. CSD search/ analysis reveals some definite significant aspects in both the Ag-pi and Ag-pi (eta(3)-) bonds. CSD search/analysis reveals some definite significant aspects in both the Ag-pi and Ag center dot center dot center dot Ag bonded systems in the present investigation. (C) 2014 Elsevier B. V. All rights reserved.