Bis(1,10-phenanthroline-5,6-dione-κ2N,N′)silver(I) perchlorate

Abstract

At 93 K, in the structure of a new polymorph of [AgL2]+(ClO4)− (L = 1,10-phenanthroline-5,6-dione) or [Ag(C12H6N2O2)2]ClO4, there is a complete formula unit in the asymmetric unit. The dihedral angle between the two phendione ligands is 36.7 (2)°. The geometry about the Ag atom is distorted tetra­hedral. There are short contacts between the perchlorate anion and the phendione ligands [O⋯C = 2.845 (5) Å], as well as unusual and different O—C—C—O torsion angles for the two phendione ligands [−21.9 (7) and −5.0 (7)°], which reflects the fact that in this polymorph there is no crystallographically imposed symmetry in the cation.