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Morphology dependant oxidation of aromatic alcohols by new symmetrical copper(II) metallatriangles formed by self-assembly of a shared bis-benzimidazolyl diamide ligand

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Title: Morphology dependant oxidation of aromatic alcohols by new symmetrical copper(II) metallatriangles formed by self-assembly of a shared bis-benzimidazolyl diamide ligand
Authors: Mahiya, Kuldeep1, Mathur, Pavan pavanmat@yahoo.co.in
Source: Inorganica Chimica Acta. Apr2013, Vol. 399, p36-44. 9p.
Subjects: Aromatic compounds, Oxidation of chemical alcohols, Symmetry (Physics), Molecular self-assembly, Diamides, Ligands (Chemistry), Benzimidazoles, Copper ions
Abstract: Abstract: A new bis-benzimidazole-based diamide ligand N 2,N 2′-bis((1H-benzo[d]imidazol-2-yl)methyl)-[1,1′-biphenyl]-2,2′-dicarboxamide, L and its three Cu(II) metallatriangles of general formula [Cu3(L)3X3]·3X·nH2O (where X=Cl, Br, NO3) have been synthesized and one of them is structurally characterized. X-ray diffraction work reveals that the metallatriangle [Cu3(L)3Cl3]·3Cl·15H2O crystallizes in trigonal R space group with two independent molecules in the asymmetric unit. The asymmetric unit contains only one-third of the molecules and the rest are generated by the crystallographic axis. Each copper(II) ion adopts a highly distorted square pyramidal geometry. The copper(II) metallatriangles are used as catalyst to carry out the oxidation of substituted benzyl alcohols heterogeneously, in the presence of tert-butyl hydroperoxide. Interestingly, the ratio of product profile and the percentage conversion of the products changes with the surface morphology of the metallatriangle employed as a catalyst. A kite type morphology is found to be highly selective to the formation of acid product over the aldehyde, while a hexagonal type morphology results in a mixed acid+aldehyde product. The initial rate of formation of the aldehyde is found to be almost independent of the amount of catalyst employed. [Copyright &y& Elsevier]
Copyright of Inorganica Chimica Acta is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Morphology dependant oxidation of aromatic alcohols by new symmetrical copper(II) metallatriangles formed by self-assembly of a shared bis-benzimidazolyl diamide ligand
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  Data: <searchLink fieldCode="AR" term="%22Mahiya%2C+Kuldeep%22">Mahiya, Kuldeep</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mathur%2C+Pavan%22">Mathur, Pavan</searchLink><i> pavanmat@yahoo.co.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Inorganica+Chimica+Acta%22">Inorganica Chimica Acta</searchLink>. Apr2013, Vol. 399, p36-44. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Aromatic+compounds%22">Aromatic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation+of+chemical+alcohols%22">Oxidation of chemical alcohols</searchLink><br /><searchLink fieldCode="DE" term="%22Symmetry+%28Physics%29%22">Symmetry (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+self-assembly%22">Molecular self-assembly</searchLink><br /><searchLink fieldCode="DE" term="%22Diamides%22">Diamides</searchLink><br /><searchLink fieldCode="DE" term="%22Ligands+%28Chemistry%29%22">Ligands (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Benzimidazoles%22">Benzimidazoles</searchLink><br /><searchLink fieldCode="DE" term="%22Copper+ions%22">Copper ions</searchLink>
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  Data: Abstract: A new bis-benzimidazole-based diamide ligand N 2,N 2′-bis((1H-benzo[d]imidazol-2-yl)methyl)-[1,1′-biphenyl]-2,2′-dicarboxamide, L and its three Cu(II) metallatriangles of general formula [Cu3(L)3X3]·3X·nH2O (where X=Cl, Br, NO3) have been synthesized and one of them is structurally characterized. X-ray diffraction work reveals that the metallatriangle [Cu3(L)3Cl3]·3Cl·15H2O crystallizes in trigonal R space group with two independent molecules in the asymmetric unit. The asymmetric unit contains only one-third of the molecules and the rest are generated by the crystallographic axis. Each copper(II) ion adopts a highly distorted square pyramidal geometry. The copper(II) metallatriangles are used as catalyst to carry out the oxidation of substituted benzyl alcohols heterogeneously, in the presence of tert-butyl hydroperoxide. Interestingly, the ratio of product profile and the percentage conversion of the products changes with the surface morphology of the metallatriangle employed as a catalyst. A kite type morphology is found to be highly selective to the formation of acid product over the aldehyde, while a hexagonal type morphology results in a mixed acid+aldehyde product. The initial rate of formation of the aldehyde is found to be almost independent of the amount of catalyst employed. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Inorganica Chimica Acta is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.ica.2012.12.037
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      – Code: eng
        Text: English
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        PageCount: 9
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      – SubjectFull: Aromatic compounds
        Type: general
      – SubjectFull: Oxidation of chemical alcohols
        Type: general
      – SubjectFull: Symmetry (Physics)
        Type: general
      – SubjectFull: Molecular self-assembly
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      – SubjectFull: Diamides
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      – SubjectFull: Ligands (Chemistry)
        Type: general
      – SubjectFull: Benzimidazoles
        Type: general
      – SubjectFull: Copper ions
        Type: general
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      – TitleFull: Morphology dependant oxidation of aromatic alcohols by new symmetrical copper(II) metallatriangles formed by self-assembly of a shared bis-benzimidazolyl diamide ligand
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              Text: Apr2013
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              Y: 2013
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