An atypical network: Noninterpenetrating (10,3)-d nets using an unsymmetrical flexible ligand and Ag(I) as three-connected nodes

The flexible unsymmetrical thioether ligand 4-pyridyisulfanylmethyl-pyrazine (L) was prepared and reacted with AgX (X = BF4, ClO4, PF6) to form three isomorphous coordination polymers {[Ag(L)](X)}(infinity) that were characterized by X-ray crystallography. Topological analysis revealed that the compounds formed rare noninterpenetrated (10,3)-d (or utp) nets. The ligand was designed to act as a three-connected node and provided three nonplanar topological links to form an extended three-dimensional structure. A feature of the three structures was the invariance of the networks to the choice of anion. The indicators for distinguishing between (10,3)-a and (10,3)-d nets are discussed.