Abstract
The heterobifunctional organic ligand, 3-(1,2,4-triazol-4-yl)adamantane-1-carboxyl-ate (tr-ad-COO- ), was employed for the synthesis of the title silver(I) coordination polymer, {[Ag(C13H16N3O2)]·2H2O} n , crystallizing in the rare ortho-rhom-bic C2221 space group. Alternation of the double μ2-1,2,4-triazole and μ2-η2:η1-COO- (chelating, bridging mode) bridges between AgI cations supports the formation of sinusoidal coordination chains. The AgI centers possess a distorted {N2O3} square-pyramidal arrangement with τ5 = 0.30. The angular organic linkers connect the chains into a tetra-gonal framework with small channels along the c-axis direction occupied by water mol-ecules of crystallization, which are inter-linked via O-H⋯O hydrogen bonds with carboxyl-ate groups, leading to right- and left-handed helical dispositions.
Highlights
Organic ligands, which contain two different functional groups, such as azole and carboxylic groups, attract attention in the context of the construction of unusual metal–organic frameworks (MOFs) including heterometallic architectures (Guillerm et al 2014)
The ‘separate’ role, where tr is responsible for di, tri- or tetranuclear cluster formation, whereas the COOÀ group only occupies terminal positions (Handke et al 2014) or it can be involved in the separate coordination to metal centers
We report the crystal structure of a new silver(I) coordination polymer [Ag(tr-ad-COO)]nÁ2H2O (I) based on the 1-(1,2,4-triazol-4-yl)-3-carboxyadamantane (C13H16N3O2; tr-ad-COOH) ligand
Summary
Organic ligands, which contain two different functional groups, such as azole and carboxylic groups, attract attention in the context of the construction of unusual metal–organic frameworks (MOFs) including heterometallic architectures (Guillerm et al 2014). Each ligand function is intended to introduce its coordination ability towards a metal center forming secondary building units (SBUs) based on its peculiarities. The ‘separate’ role, where tr is responsible for di-, tri- or tetranuclear cluster formation, whereas the COOÀ group only occupies terminal (non-bridging) positions (Handke et al 2014) or it can be involved in the separate coordination to metal centers. In this context, Chen et al (2011) used 1,2,4-triazolyl isophthalate as a ligand in the synthesis of a series of AgI–LnIII heterometallic coordination polymers. We report the crystal structure of a new silver(I) coordination polymer [Ag(tr-ad-COO)]nÁ2H2O (I) based on the 1-(1,2,4-triazol-4-yl)-3-carboxyadamantane (C13H16N3O2; tr-ad-COOH) ligand
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