title: Bis[N-(pyridin-2-ylcarbon-yl)pyridine-2-carboxamidato]iron(III) perchlorate monohydrate.
abstract: The structure of the title salt complex, [Fe(C(12)H(8)N(3)O(2))(2)]ClO(4)·H(2)O, contains one Fe(III) cation, two N-(pyridin-2-ylcarbon-yl)pyridine-2-carboxamidate (bpca(-)) anions, one perchlorate anion and one water mol-ecule. The Fe(III) cation has an approximate octa-hedral geometry, defined by six N atoms from two bpca(-) anions. The nearly parallel [dihedral angle = 1.50 (1)°] bpca(-) anions form two-dimensional supermolecules along the a axis by the way of weak π-π stacking inteactirons [centroid-centroid distances = 3.948 (2), 4.000 (2), 3.948 (2), 3.911 (2), 3.897 (2), 3.984 (2) and 3.929 (2) Å]. Intra- and inter-molecular C-H⋯O hydrogen bonding occurs. The water mol-ecule [occupancies 0.520 (5) and 0.480 (5)], two carbonyl O atoms [occupancies 0.622 (7) and 0.378 (7)] and the four perchlorate O atoms [occupancies 0.887 (4) and 0.113 (4)] are each disordered over two positions.
authors.affiliation: Pharmacy College, Henan University of Traditional Chinese Medicine, Zhengzhou 450008,  People's Republic of China.
authors.forename: Xi-Feng
authors.initials: XF
authors.lastname: Li
authors.forename: Tian-Bao
authors.initials: TB
authors.lastname: Qiu
authors.forename: Li-Xin
authors.initials: LX
authors.lastname: Hu
authors.forename: Chun-Yue
authors.initials: CY
authors.lastname: Hu