Silver-containing complexes of zinc [(H2NCH2CH2NH2)2Zn][Ag(CN)2]2 and [(NC5H4-C5H4N)2Zn(H2O)][Ag(CN)2]2

Abstract

Complexes [(H2NCH2CH2NH2)2Zn][Ag(CN)2]2 (1) (C8H8N8ZnAg2, M = 497.33; monoclinic system, sp. gr. C2/m; cell parameters: a = 10,657(5) Å, b = 13,298(6) Å, c = 6,445(3) Å; α = 90,00°, β = 121,16(2)°, g = 90,00, V = 781,6(6) Å3, Z = 2; rcalc = 2,113 g/cm3; m = 4,001 mm–1; F(000) = 472,0; collection range at 2q: 7.06-55.14°; total reflections 6059; independent reflections 939 (Rint = 0.0359); GOOF = 1,271; R-factor 0,0465) and [(NC5H4-C5H4N)2Zn(H2O)][Ag(CN)2]2 (2) (C24H18N8OZnAg2, M = 715,57; monoclinic system, sp. gr. P21/c; cell parameters: a = 15,385(5) Å, b = 14,235(5) Å, c = 12,751(4) Å; α = 90,00°, β = 112,834(10)°, g = 90,00, V = 2573,7(14) Å3, Z = 4; rcalc = 1,847 g/cm3; m = 2,464 mm–1; F(000) = 1400,0; collection range at 2q: 6,02-73,06°; total reflections 72408; independent reflections 12605 (Rint = 0,0606); GOOF = 1,021; R-factor 0,0510) were obtained by the interaction of zinc diacetate with ethylenediamine, 2,2'-bipyridine and potassium dicyanoargentate. Structures of the complexes were determined by X-ray diffraction analysis. Product 1 has a 1D coordination polymer structure and consists of zinc cations surrounded by two ethylenediamine molecules and two [Ag(CN)2]– anions of the bridge type; the positive charge is compensated by free dicyanoargentate anions. At the same time, zinc cations in complex 2 are coordinated by two 2,2'-bipyridine molecules, one terminal dicyanoargentate anion and a water molecule; the uncoordinated [Ag(CN)2]– anion also serves to compensate for the positive charge.