Acta Cryst. (2007). E63, m2309-m2310  [ doi:10.1107/S1600536807037580 ]

Bis(1,10-phenanthroline-5,6-dione-²N,N')silver(I) perchlorate

J. Onuegbu, R. J. Butcher, C. Hosten, U. C. Udeochu and O. Bakare

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 [OC = 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.

Online 10 August 2007

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