Solvent dependent supramolecular interactions in two 5-chloro thiophene 2-carboxylate bridged dinuclear copper(II) complexes

Jennifer, Samson Jegan; Muthiah, Packianathan Thomas; Muthukumaran, G.

doi:10.1016/j.ica.2013.07.006

Cited by 11 publications

(5 citation statements)

References 40 publications

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“…The Cu-O eq bond distances for 2 and 3 are in the 1.94-1.98 Å range ( Table 3). The bond distances of both complexes, as well as the similar complex [Cu 2 (5-Cl-2-tpc) 4 (DMSO) 2 ] (5-Cl-2-tpc = 5-chloro-2-thiophenecarboxylate) which has been recently published [12], are comparable to other dinuclear copper(II) carboxylates with dimethylsulfoxide [38]. The crystal …”

Section: [Cumentioning

confidence: 74%

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Structural, magnetic and quantum-chemical study of dinuclear copper(II) thiophenecarboxylate and furancarboxylate complexes

et al. 2014

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Section: [Cumentioning

confidence: 74%

“…In the case of copper(II) thiophenecarboxylates, mostly mononuclear [10,11], dinuclear [11,12] and polymeric [11] complexes could be found in the literature. When dinuclear copper carboxylates are observed, the paddle-wheel structural motif is predominant.…”

Section: Introductionmentioning

confidence: 99%

Structural, magnetic and quantum-chemical study of dinuclear copper(II) thiophenecarboxylate and furancarboxylate complexes

et al. 2014

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“…5-TPC (5-TPC = 5-chloro-2-thiophene carboxylate) not only shows versatile coordination modes but also exhibit non covalent interactions like Cl…π and C-H…Cl [43][44][45][46][47][48].…”

Section: Brmentioning

confidence: 99%

Synthesis, crystal structures and supramolecular architectures of square pyramidal Cu(II) complexes containing aromatic chelating N,N’-donor ligands

Jennifer¹,

Muthiah²

2014

Chemistry Central Journal

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Background: Design of new metal complexes is an interesting field for development of new functional molecular-based materials. In this process by the usage of mixed functional ligands one can precisely tune the physical and chemical properties of those metal complexes. However, it is difficult to obtain the desired complex in many cases for factors like different coordination abilities of the ligands and the types of anions have a great influence on the structure.(ClO 4 ) 2 (4), and [Cu 2 (Bipy) 4 (H 2 PO 4 )] (5) (where Bipy = 2,2'-bipyridine, Phen = 1,10-phenanthroline, 4,7-Phen = 4,7-hydroxy-1,10-phenanthroline, 5-TPC = 5-chloro-2-thiophene carboxylate) has been synthesized and characterised using single crystal X-ray diffraction studies. In all the compounds, the N,N' ligand coordinates in a bidentate chelating manner and the copper has a square pyramidal geometry. Conclusions: Complexes (1,2) are expected to be isostructural due to similarity of the N.N'-chelating ligands used, but due to the difference in supramolecular architectures no similar unit cells were observed. This is important in crystal engineering point of view. Complexes (1-4) possess the neutral mononuclear and complex (5) possesses a dinuclear entity. These entities are connected by intermolecular interactions like X•••π, H•••X, (X = Cl) generating supramolecular architectures.

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“…For the sake of further investigation, it is worthwhile to analyze and compare complex structures based on these pyridines and pyrimidines with rigid building blocks such as TPC, 5-TPC and TDC (TPC = Thiophene 2-carboxylic acid, 5-TPC = 5-Chloro thiophene 2- carboxylic acid, TDC-Thiophene dicarboxylic acid). 5-TPC has been an interesting ligand to us due to its hydrogen bonding ability as well as formation of interesting Cl…Cl and C-H…Cl halogen bonding interactions [ 23 , 27 - 30 ]. Beyond this, the aim of this work is to compare the differences that occur during the interchange of pyridines/pyrimidines and to list out the commonly occurring motifs.…”

Section: Introductionmentioning

confidence: 99%

Design of co-crystals/salts of some Nitrogenous bases and some derivatives of thiophene carboxylic acids through a combination of hydrogen and halogen bonds

Jennifer

Muthiah

2014

Chemistry Central Journal

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BackgroundThe utility of N-heterocyclic bases to obtain molecular complexes with carboxylic acids is well studied. Depending on the solid state interaction between the N-heterocyclic base and a carboxylic acid a variety of neutral or ionic synthons are observed. Meanwhile, pyridines and pyrimidines have been frequently chosen in the area of crystal engineering for their multipurpose functionality. HT (hetero trimers) and LHT (linear heterotetramers) are the well known synthons that are formed in the presence of pyrimidines and carboxylic acids.ResultsFourteen crystals involving various substituted thiophene carboxylic acid derivatives and nitrogenous bases were prepared and characterized by using single crystal X-ray diffraction. The 14 crystals can further be divided into two groups [1a-7a], [8b-14b] based on the nature of the nitrogenous base. Carboxylic acid to pyridine proton transfer has occurred in 3 compounds of each group. In addition to the commonly occurring hydrogen bond based pyridine/carboxylic acid and pyrimidine/carboxylic acid synthons which is the reason for assembly of primary motifs, various other interactions like Cl…Cl, Cl…O, C–H…Cl, C-H…S add additional support in organizing these supermolecules into extended architectures. It is also interesting to note that in all the compounds π-π stacking occurs between the pyrimidine-pyrimidine or pyridine-pyridine or acid-acid moieties rather than acid-pyrimidine/pyridine.ConclusionsIn all the compounds (1a-14b) either neutral O–H…Npyridyl/pyrimidine or charge-assisted Npyridinium-H…Ocarboxylate hydrogen bonds are present. The HT (hetero trimers) and LHT (linear heterotetramers) are dominant in the crystal structures of the adducts containing N-heterocyclic bases with two proton acceptors (1a-7a). Similar type supramolecular ladders are observed in 5TPC44BIPY (8b), TPC44BIPY (9b), TPC44TMBP (11b). Among the seven compounds [8b-14b] the extended ligands are linear in all except for the TMBP (10b, 11b, 12b). The structure of each compound depends on the dihedral angle between the carboxyl group and the nitrogenous base. All these compounds indicate three main synthons that regularly occur, namely linear heterodimer (HD), heterotrimer (HT) and heterotetramer (LHT).

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Solvent dependent supramolecular interactions in two 5-chloro thiophene 2-carboxylate bridged dinuclear copper(II) complexes

Cited by 11 publications

References 40 publications

Structural, magnetic and quantum-chemical study of dinuclear copper(II) thiophenecarboxylate and furancarboxylate complexes

Structural, magnetic and quantum-chemical study of dinuclear copper(II) thiophenecarboxylate and furancarboxylate complexes

Synthesis, crystal structures and supramolecular architectures of square pyramidal Cu(II) complexes containing aromatic chelating N,N’-donor ligands

Design of co-crystals/salts of some Nitrogenous bases and some derivatives of thiophene carboxylic acids through a combination of hydrogen and halogen bonds

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