Synthesis and crystal structure of heteronuclear La(III)-Cu(II) complex {[LaCu2(NTA)(2)(4,4 '-bpy)(H2O)(3)]NO3 center dot 5H(2)O}(n)

A novel La(III)-Cu( II) heterometallic coordination polymer {[LaCu2( NTA)(2 )(4, 4'-bpy) (H2O)(3)] NO3 . 5H(2)O}(n), where H(3)NTA denotes nitrilotriac etic add and 4, B-bpy denotes 4, 4'-bipyridine, was synthesized and charact erized by IR spectrum, elemental analysis and X-ray diffraction. The comple x n;crystallizes in the triclinic space group P (1) over bar with cell para meters a = 1.33710(10) nm, b = 1.44530(10) mn, c = 1.0949(2) nn, alpha = 71 .905(7)degrees beta = 74.327(7)degrees, gamma = 64.427(9)degrees, V = 1.791 2(4) mm(3) and Z = 2. It consists of heterometallic units, in which each La (III) ion is coordinated in a distorted monocapped square antiprism by thre e oxygen atoms from water molecules and six carboxyl oxygen atoms from five NTA(3-) ions, and each Cu (II) ion is coordinated by one nitrogen atom fro m 4, Q-bpy and one nitrogen atom, three oxygen atoms from NTA(3-). In the t ide complex, La(III) ions and Cu (II) ions are connected by the heterometal lic bridging of NTA(3-), constructing a two-dimensional network structure a long the [110]. And it Is extended into an finite three-dimensional network . structure by the formation of homometallic bridging of Cu-4, 4'-bpy-Cu, e xhibiting a certain inclusion ability.