Syntheses and characterizations of six hydrogen-bonded silver(I) complexes from assembly of silver(I) nitrate and aminobenzoic acid

Six hydrogen-bonded silver(I) complexes, Ag(4-abaH)2(NO3) (1), [Ag(4-abaH)2(NO3)]n (2), {[Ag(4-aba)(4-abaH)] <f>·</f> H2O}n (3), {[Ag(4,<f>4′</f>-bipy)(H2O)](4-aba)0.5(NO3)0.5 <f>·</f> (H2O)0.5}n (4), [Ag[(3-abaH0.5)2] (5), and {[Ag(3-aba)] <f>·</f> H2O}n (6) (4-abaH=4-aminobenzoic acid, 3-abaH=3-aminobenzoic acid), have been synthesized and characterized by single-crystal X-ray diffraction analyses. In 1, 4-abaH serves as a monodentate ligand coordinating to Ag(I) through its nitrogen atom, while uncoordinated carboxylic group links (4-abaH)-Ag-(4-abaH) into a one-dimensional metallic carboxylic synthon. 2 may be regarded as an extension of 1 into a two-dimensional carboxylic synthon through NO3 − bridging two adjacent Ag(I) centers. In 3, 4-abaH in a monodentate mode and 4-aba in a μ-N,O bridging mode link three-coordinated Ag(I) to form a one-dimensional swallow-like chain, which is further extended into a two-dimensional layer structure through inter-chain hydrogen bonding interactions. The alternating Ag(I) and 4,<f>4′</f>-bipy in 4 give rise to a slightly distorted linear chain, which is further extended into a two-dimensional layer through the completely overlapping and off-set stacking interactions. The hydrogen bonds involving in weakly coordinated aqueous molecules and 4-aba further extend it into a three-dimensional framework. In 5, the inter-molecular hydrogen bonding and <f>π–π</f> stacking interactions extend Ag[(3-abaH0.5)2] into a two-dimensional supramolecular architecture. In 6, 3-aba in a <f>μ3</f>-N,O,<f>O′</f> coordination mode links three three-coordinated Ag(I) into a two-dimensional network. Uncoordinated aqueous molecules and the adjacent 3-aba oxygen atoms form intermolecular hydrogen bonds. [Copyright &y& Elsevier]