title: 4-(4-Pyrid-yl)pyridinium penta-aqua(pyridazine-4,5-dicarboxyl-ato)praseodymate(III).
abstract: In the title complex, (C(10)H(9)N(2))[Pr(C(6)H(2)N(2)O(4))(2)(H(2)O)(5)], the Pr atom is nine-coordinated by nine O atoms from two pyridazine-4,5-dicarboxyl-ate anions and five water mol-ecules. It is noteworthy that there is a protonated bipyridine mol-ecule in the structure. Inter-molecular O-H⋯O, O-H⋯N and N-H⋯N hydrogen bonds are present, resulting in a three-dimensional network.
authors.forename: Zhen-Qin
authors.initials: ZQ
authors.lastname: Zhang
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Xue
authors.forename: Bi-Xia
authors.initials: BX
authors.lastname: Yao
authors.forename: Xing
authors.initials: X
authors.lastname: Ji
authors.forename: Hui-Jun
authors.initials: HJ
authors.lastname: Jiang