2015
DOI: 10.1016/j.saa.2014.11.042
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Synthesis and spectral characterization of mono- and binuclear copper(II) complexes derived from 2-benzoylpyridine-N4-methyl-3-thiosemicarbazone: Crystal structure of a novel sulfur bridged copper(II) box-dimer

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Cited by 22 publications
(6 citation statements)
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“…The Cu1⋯Cu2 distance inside the dimeric unit is 3.540(24) Å, similar to those in μ 2 -thiolate bridged CuIJII) dimers. [47][48][49][50][51][52][53][54][55][56][57] Noticeably, three deprotonated ligands in the [Cu 2 IJL) 3 ] + cation display two kinds of coordination modes: two ligands coordinate to two Cu atoms in an expected N 2 S tridentate manner, while the last one serves as a tetradentate donor with two N atoms (pyridine N atom, imine N atom) adopting a normal chelating mode and S bridging mode (μ 2 ) linking two metal centers. The C-S distances range between 1.738(13) and 1.767(12) Å, being within the normal range of a C-S single bond, indicating that the ligands are coordinated in their deprotonated thiolate form.…”
Section: Chemistrymentioning
confidence: 99%
See 1 more Smart Citation
“…The Cu1⋯Cu2 distance inside the dimeric unit is 3.540(24) Å, similar to those in μ 2 -thiolate bridged CuIJII) dimers. [47][48][49][50][51][52][53][54][55][56][57] Noticeably, three deprotonated ligands in the [Cu 2 IJL) 3 ] + cation display two kinds of coordination modes: two ligands coordinate to two Cu atoms in an expected N 2 S tridentate manner, while the last one serves as a tetradentate donor with two N atoms (pyridine N atom, imine N atom) adopting a normal chelating mode and S bridging mode (μ 2 ) linking two metal centers. The C-S distances range between 1.738(13) and 1.767(12) Å, being within the normal range of a C-S single bond, indicating that the ligands are coordinated in their deprotonated thiolate form.…”
Section: Chemistrymentioning
confidence: 99%
“…The C-S distances range between 1.738(13) and 1.767(12) Å, being within the normal range of a C-S single bond, indicating that the ligands are coordinated in their deprotonated thiolate form. 58 Such a structure of the [Cu 2 IJL) 3 ] dimeric unit is unique and more interesting since the stoichiometry of metal : thiosemicarbazone ligand is 2 : 3 and two copperIJII) ions show different chelating modes with bridging S atoms to form a square-planar/octahedral complex (4 : 6-coordination), as compared with those of reported CuIJII)-thiosemicarbazone dimers, [47][48][49][50][51][52][53][54][55][56][57] where the stoichiometry of metal : thiosemicarbazone is 1 : 1 and two Cu centers both have the same 5-coordinated square-pyramidal topology. In addition, the crystal structure is stabilized by the linking of the different components of intermolecular hydrogen bonds of 1 (Fig.…”
Section: Chemistrymentioning
confidence: 99%
“…The coordination geometry could also be described as distorted octahedral . The observed bond angle and bond length values were compared to already reported values …”
Section: Resultsmentioning
confidence: 55%
“…An increase in the C(12)─S(1) bond length from 1.6809(13) to 1.7486(14) Å and a corresponding decrease in the C(12)─N(3) bond length from 1.3566(17) to 1.320(2) Å substantiated the binding. Table presents crystallographic data for H 2 L 1 and complexes 1 , 2 and 3 . Single‐crystal diffraction analysis further revealed that the sulfur‐bridged Cu(II) complex forms a dimer in which each metal centre takes up a distortion in octahedral geometry .…”
Section: Resultsmentioning
confidence: 99%
“…Ligand HL was synthesized as previously reported. , Copper complexes were synthesized as described below. The HL ligand was added to the 20 mL methanol solution of CuCl 2 ·2H 2 O in a ratio of 1:1 and 1:2 and refluxed for 0.5 h. The above mixture solution was slowly evaporated at room temperature to obtain dark-blue blocky single crystals.…”
Section: Methodsmentioning
confidence: 99%