Poly[pentaaquatetrakis(μ2-nicotinato-κ2N:O)(perchlorato-κO)lanthanum(III)disilver(I)

Biao Guan,Chao-Hua Zhang,Wen-Dong Song

doi:10.1107/s1600536809026130

Biao Guan, Chao-Hua Zhang + Show 1 more

Open Access

https://doi.org/10.1107/s1600536809026130

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Abstract

In the title complex, [Ag2La(C6H4NO2)4(ClO4)(H2O)5]n, the LaIII atom, lying on a twofold rotation axis, is eight-coordinated by four O atoms from four nicotinate (nic) ligands and four water molecules in a distorted square-antiprismatic coordination geometry. The AgI atom is coordinated in an almost linear fashion by two pyridyl N atoms of two nic ligands. The linear coordination is augmented by weak interactions with one O atom from a half-occupied ClO4 − anion and a water molecule lying on a twofold axis. Two Ag(nic)2 units connect two La atoms, forming a cyclic unit. These units are further extended into an infinite zigzag chain. The chains are bridged by the disordered perchlorate ions via weak Ag—O [2.678 (2) Å] interactions. O—H⋯O hydrogen bonds, weak Ag⋯Ag [3.3340 (15) Å] interactions and π–π interactions between the pyridyl rings [centroid–centroid distance = 3.656 (2) Å] lead to a three-dimensional network.

Highlights

LaIII atom, lying on a twofold rotation axis, is eightcoordinated by four O atoms from four nicotinate ligands and four water molecules in a distorted squareantiprismatic coordination geometry
The linear coordination is augmented by weak interactions with one O atom from a half-occupied
Ag(nic)2 units connect two La atoms, forming a cyclic unit. These units are further extended into an infinite zigzag chain

Summary

Structure Reports

Laboratory and Facility Management Division, Guang Dong Ocean University, Zhanjiang 524088, People’s Republic of China, bSchool of Food Science and Technology, Guang Dong Ocean University, Zhanjiang 524088, People’s Republic of China, and cCollege of Science, Guang Dong Ocean University, Zhanjiang

Crystal data

Bruker APEXII CCD diffractometer

Graphite monochromator φ and ω scans