A novel five-coordinated silver complex {[Ag(HPPz)(4)(NO3)](NO3)(4)} [PPz = trans-2-(2-phenylethenyl)pyrazine]: Self-assembly of supramolecular architecture based on NO3 anions

摘要

The title complex {[Ag(HPPz)(4)(NO3)](NO3)(4)},1 has been prepared from the reaction of trans-2-(2-phenylethenyl)pyrazine (PPz) with AgNO3 at room temperature in 10% HNO3 and structurally determined by single-crystal X-ray diffraction analysis. The result shows that the Ag-1 center is five-coordinated with one NO3- anion and four mono-protonated HPPz(+) ligands. The NO3- anions display versatility not only participating in coordination, but also linking the HPPz+ ligands by electrostatic and hydrogen bond interactions. The final framework can be considered as a 3D supramolecular architecture built up by the self-assembly of the building blocks ([Ag(HPPz)(4)(NO3)(3+), NO3-), driven by diverse interactions based on the NO3- anions. (c) 2005 Elsevier B.V. All rights reserved.