title: catena-Poly[[[tetra-aqua-manganese(II)]-μ-4,4'-bipyridine] bis-(3-hydroxy-cinnamate) dihydrate].
abstract: The title compound, {[Mn(C(10)H(8)N(2))(H(2)O)(4)](C(9)H(7)O(3))(2)·2H(2)O}(n), was obtained by the hydro-thermal reaction of manganese chloride with mixed 3-hydroxy-lcinnamic acid (H(2)L) and 4,4'-bipyridine (4,4'-bipy) ligands. The structure contains [Mn(C(10)H(8)N(2))(H(2)O)(4)](2+) cations with the Mn(II) atoms lying on a centres of inversion and bridged into a linear chain along the a axis by 4,4'-bipy ligands, surrounded by HL(-) anions and uncoordinated water mol-ecules. Extensive O-H⋯O hydrogen-bonding and weak π-π inter-actions [centroid-centroid distance = 3.7572  (3) Å] between the constituents lead to the formation of a three-dimensional supra-molecular network.
authors.affiliation: Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, People's Republic of China.
authors.forename: Zhi-Wei
authors.initials: ZW
authors.lastname: Tang
authors.forename: Jun-Dan
authors.initials: JD
authors.lastname: Fu
authors.forename: Long-Ping
authors.initials: LP
authors.lastname: Jiang
authors.forename: Yi-Hang
authors.initials: YH
authors.lastname: Wen