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

摘要

Six hydrogen-bonded silver(I) complexes, Ag(4-abaH)(2)(NO3) (1), [Ag(4-abaH)(2)(NO3)(1n) (2), {[Ag(4-aba)(4-abaH)](H2O)-H-.}(n) (3), {[Ag(4,4'-bipy)(H2O)](4-aba)(0.5)(NO3)(0.5)(.)(H2O)(0.5)}(n) (4), [Ag(3-abaH(0.5))(2)] (5), and {[Ag(3-aba)](H2O)-H-.}(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(l) 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 I 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 mu-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(l) and 4,4'-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 pi-pi stacking interactions extend Ag[(3-abaH(0.5))(2)] into a two-dimensional supramolecular architecture. In 6, 3-aba in a mu(3)-N,O,O' 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. (C) 2003 Elsevier B.V. All rights reserved. [References: 51]