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Issue 16, 2017
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Crystal engineering of a series of complexes and coordination polymers based on pyrazole-carboxylic acid ligands

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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.

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

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Publication details

The article was received on 17 May 2017, accepted on 26 Jun 2017 and first published on 17 Jul 2017


Article type: Paper
DOI: 10.1039/C7NJ01714F
Citation: New J. Chem., 2017,41, 8232-8241
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    Crystal engineering of a series of complexes and coordination polymers based on pyrazole-carboxylic acid ligands

    S. Radi, M. El-Massaoudi, H. Benaissa, N. N. Adarsh, M. Ferbinteanu, E. Devlin, Y. Sanakis and Y. Garcia, New J. Chem., 2017, 41, 8232
    DOI: 10.1039/C7NJ01714F

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