title: Novel coordination polymer containing a mixed valence copper(I,II) phosphonate unit: Cu(I)(2)Cu(II)(hedpH(2))(2)(4,4'-bpy)(2).2H(2)O (hedp = 1-hydroxyethylidenediphosphonate).
abstract: This paper reports the synthesis and crystal structure of a novel mixed valence copper(I,II) compound, Cu(I)(2)Cu(II)(hedpH(2))(2)(4,4'-bpy)(2).2H(2)O (1), where hedp represents 1-hydroxyethylidenediphosphonate. The structure is composed of [Cu(I)(2)Cu(II)(hedpH(2))(2)] trimer units and 4,4'-bipyridine linkages, forming a two-dimensional brick-wall-like layer structure in the ab plane. The layers are stacked along the [001] direction with strong interlayer hydrogen bonds and pi-pi interactions, thus leading to the construction of a three-dimensional network.
authors.affiliation: State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P.R. China.
authors.forename: Li-Min
authors.initials: LM
authors.lastname: Zheng
authors.forename: Ping
authors.initials: P
authors.lastname: Yin
authors.forename: Xin-Quan
authors.initials: XQ
authors.lastname: Xin