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Molbank 2017, 2017(3), M952; doi:10.3390/M952

Solvent-Mediated Synthesis of M(II)-Coordination Polymer Part 1: Crystal Structure of Poly(1,2-di(4-pyridyl)ethylene-k2N,N')-bis(1,4-benzenediacetato-k4O,O′,O′′,O′′')zinc(II)], C22H18ZnN2O4

1
Chemistry Department, Cross River State College of Education, Akamkpa 542104, Cross River State, Nigeria
2
Department of Pure and Applied Chemistry, University of Calabar, P.M.B.-1115, Calabar 540242, Nigeria
*
Author to whom correspondence should be addressed.
Received: 18 July 2017 / Revised: 3 August 2017 / Accepted: 3 August 2017 / Published: 6 August 2017
(This article belongs to the Section Structure Determination)
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Abstract

An interaction of water-methanol solution of sodium1,4-benzenediacetate (bda) and 4,4′-bipyridylethelene (bpee) with aqueous solution of Zn(NO3)2·6H2O at room temperature yielded colourless crystals of 1 after three weeks in a sealed glass tube. The compound with composition C22H18ZnN2O4 crystallizes in monoclinic space group P21/c, with the following cell dimensions: a = 10.4566(2), b = 13.3085(2), c = 13.7189(2) Å, β = 101.491(1)°. In the structure of 1, two Zn(II) neighbours are connected by two bda ligands adopting chelating and bidentate-bridging coordination modes to form a dimeric unit (Zn2O8N4) with the Zn–Zn distance of 4.0432(6) Å. The carboxyl-bridged dimeric units are extended along the [001] direction by bpee co-ligands and further linked by bda ligand to form a three-dimensional network structure. The IR shows the characteristic bands of the carboxylates at 1611/1507 cm−1 and 1424/1373 cm−1, respectively, for asymmetric and symmetric stretching −CO2 vibrations. The separation ∆[νasym(CO2) − νsym(CO2)] values of 187 and 134 cm−1 are indicative of chelating and bidentate bridging coordination modes of the carboxylate to the metal centre. View Full-Text
Keywords: coordination polymer; crystal structure metal-organic frameworks; solvent diffusion coordination polymer; crystal structure metal-organic frameworks; solvent diffusion
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MDPI and ACS Style

Adalikwu, S.A.; Offiong, O.E.; Ayi, A.A. Solvent-Mediated Synthesis of M(II)-Coordination Polymer Part 1: Crystal Structure of Poly(1,2-di(4-pyridyl)ethylene-k2N,N')-bis(1,4-benzenediacetato-k4O,O′,O′′,O′′')zinc(II)], C22H18ZnN2O4. Molbank 2017, 2017, M952.

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