title: Tris(1,10-phenanthroline-kappa2N,N')cadmium(II) bis(perchlorate) 3.5-hydrate: a water chain stabilized by perchlorate anions.
abstract: The title compound, [Cd(C(12)H(8)N(2))(3)](ClO(4))(2).3.5H(2)O, contains a cross-shaped one-dimensional channel along the c axis which encapsulates an ordered water chain. This water chain features a centrosymmetric cyclic water hexamer unit with a chair-like conformation. Neighbouring hexamers are linked by bridging water molecules. The host perchlorate anions recognize and stabilize the guest water chain via three kinds of hydrogen-bond patterns, leading to the formation of a complex one-dimensional {[(H(2)O)(7)(ClO(4))(4)](4-)}(n) anionic chain. One perchlorate acts as a single hydrogen-bond acceptor dangling on the chain, the second perchlorate on the chain serves as a double hydrogen-bond acceptor for only one water molecule to form an R(2)(2)(6) ring, where both entities lie on a twofold axis, while the third perchlorate, which also lies on a twofold axis, accepts two hydrogen bonds from two equivalent water molecules and is involved in the construction of an R(6)(5)(14) ring.
authors.affiliation: College of Chemistry and Life Science, Gannan Normal University, Ganzhou, Jiangxi 341000, People's Republic of China.
authors.forename: Yu-Hui
authors.initials: YH
authors.lastname: Sun
authors.forename: Zi-Yi
authors.initials: ZY
authors.lastname: Du
authors.forename: Shi-Yong
authors.initials: SY
authors.lastname: Zhang
authors.forename: Yan-Fang
authors.initials: YF
authors.lastname: He
authors.forename: Zhong-Gao
authors.initials: ZG
authors.lastname: Zhou
mesh_terms: D000838:Anions / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*; D010472:Perchlorates / Q000737:chemistry*; D010618:Phenanthrolines / Q000737:chemistry*; D014867:Water
chemical_list: D000838:Anions; D009942:Organometallic Compounds; D010472:Perchlorates; D010618:Phenanthrolines; C549888:tris(1,10-phenanthroline-2N,N')cadmium(II); D002104:Cadmium; D014867:Water; C494474:perchlorate