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Crystal engineering of a series of complexes and coordination polymers based on pyrazole-carboxylic acid ligands

Authors :
Yiannis Sanakis
Mohamed El-Massaoudi
Smaail Radi
Marilena Ferbinteanu
Houria Benaissa
Nayarassery N. Adarsh
Yann Garcia
Eamonn Devlin
Source :
New Journal of Chemistry. 41:8232-8241
Publication Year :
2017
Publisher :
Royal Society of Chemistry (RSC), 2017.

Abstract

Three new complexes namely [Cu(L1)H2O]·2H2O (1), [Cu2(L4)2(DMF)2(H2O)2](NO3)2 (4) and [{Cd2(L4)2Cl2(DMF)2}] (5), and two coordination polymers namely [Co(μ-L2)(DMF)2]·2H2O (2) and [Co(μ-L3)(DMF)2]·H2O (3) have been synthesized from a series of pyrazole-carboxylate ligands namely 1,1′-(ethane-1,2-diyl)bis(5-methyl-1H-pyrazole-3-carboxylic acid) (H2L1), 1,1′-(oxybis(ethane-2,1-diyl))bis(5-methyl-1H-pyrazole-3-carboxylic acid) (H2L2), 1,1′-(butane-1,4-diyl)bis(5-methyl-1H-pyrazole-3-carboxylic acid) (H2L3), and 2-(1′,5,5′-trimethyl-1H,1′H-[3,3′-bipyrazol]-1-yl)acetic acid (H2L4), and CuII/CdII/CoII ions. Single crystal structures of these compounds are discussed in the context of the effect of conformation of the ligands and supramolecular interactions observed within these edifices. Temperature-dependent magnetic data of 4 could be fitted best using two non-interacting CuII ions (S = 1/2) per molecule with giso = 2.28 and a temperature-independent paramagnetism, TIP = 1.75 × 10−5 cm3 mol−1.

Details

ISSN :
13699261 and 11440546
Volume :
41
Database :
OpenAIRE
Journal :
New Journal of Chemistry
Accession number :
edsair.doi...........b4ecceb26a440966ca3235632479e718