4-(4-Pyrid-yl)pyridinium penta-aqua(pyridazine-4,5-dicarboxyl-ato)praseodymate(III).

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.

Dichlorido(N,N'-diisopropyl-piperidine-1-carboximidamidato-κN,N')titanium(IV).

In the mononuclear title complex, [Ti(C(12)H(24)N(3))(2)Cl(2)], the Ti(IV) ion, located on a crystallographic inversion center, is six-coordinated by four N atoms from two N',N''-diisopropyl-N-carboxamidine anions and two chloride atoms in a distorted octahedral geometry. The dihedral angles between the piperidine groups and the NCN chelate rings are 51.5 (1) and 52.3 (1)°.