View in EDS

Synthesis and structural studies of two pyridine-armed reinforced cyclen chelators and their transition metal complexes.

Saved in:
Bibliographic Details
Title: Synthesis and structural studies of two pyridine-armed reinforced cyclen chelators and their transition metal complexes.
Authors: Wilson, Kevin R.1, Cannon-Smith, Desiray J.1, Burke, Benjamin P.2, Birdsong, Orry C.1, Archibald, Stephen J.2, Hubin, Timothy J.1 tim.hubin@swosu.edu
Source: Polyhedron. Aug2016, Vol. 114, p118-127. 10p.
Subjects: Pyridine, Heterocyclic compounds, Iron chelates, Transition metals, Metal ions
Abstract: Two novel pyridine pendant-armed macrocycles structurally reinforced by an ethyl bridge, either between adjacent nitrogens (for side-bridged) or non-adjacent nitrogens (for cross-bridged), have been synthesized and complexed with a range of transition metal ions (Co 2+ , Ni 2+ , Cu 2+ and Zn 2+ ). X-ray crystal structures of selected cross-bridged complexes were obtained which showed the characteristic cis-V configuration with potential labile cis binding sites. The complexes have been characterized by their electronic spectra and magnetic moments, which show the expected high spin divalent metal complex in most cases. Exceptions are the nickel side-bridged complex, which shows a mixture of high-spin and low spin, and the cobalt cross-bridged complex which has oxidized to cobalt(III). Cyclic voltammetry in acetonitrile was carried out to assess the potential future use of these complexes in oxidation catalysis. Selected complexes offer significant catalytic potential enhanced by the addition of the pyridyl arm to a reinforced cyclen backbone. [ABSTRACT FROM AUTHOR]
Copyright of Polyhedron is the property of Pergamon Press - An Imprint of Elsevier Science 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.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 116131628
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Synthesis and structural studies of two pyridine-armed reinforced cyclen chelators and their transition metal complexes.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Wilson%2C+Kevin+R%2E%22">Wilson, Kevin R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Cannon-Smith%2C+Desiray+J%2E%22">Cannon-Smith, Desiray J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Burke%2C+Benjamin+P%2E%22">Burke, Benjamin P.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Birdsong%2C+Orry+C%2E%22">Birdsong, Orry C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Archibald%2C+Stephen+J%2E%22">Archibald, Stephen J.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hubin%2C+Timothy+J%2E%22">Hubin, Timothy J.</searchLink><relatesTo>1</relatesTo><i> tim.hubin@swosu.edu</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Polyhedron%22">Polyhedron</searchLink>. Aug2016, Vol. 114, p118-127. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Pyridine%22">Pyridine</searchLink><br /><searchLink fieldCode="DE" term="%22Heterocyclic+compounds%22">Heterocyclic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Iron+chelates%22">Iron chelates</searchLink><br /><searchLink fieldCode="DE" term="%22Transition+metals%22">Transition metals</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+ions%22">Metal ions</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Two novel pyridine pendant-armed macrocycles structurally reinforced by an ethyl bridge, either between adjacent nitrogens (for side-bridged) or non-adjacent nitrogens (for cross-bridged), have been synthesized and complexed with a range of transition metal ions (Co 2+ , Ni 2+ , Cu 2+ and Zn 2+ ). X-ray crystal structures of selected cross-bridged complexes were obtained which showed the characteristic cis-V configuration with potential labile cis binding sites. The complexes have been characterized by their electronic spectra and magnetic moments, which show the expected high spin divalent metal complex in most cases. Exceptions are the nickel side-bridged complex, which shows a mixture of high-spin and low spin, and the cobalt cross-bridged complex which has oxidized to cobalt(III). Cyclic voltammetry in acetonitrile was carried out to assess the potential future use of these complexes in oxidation catalysis. Selected complexes offer significant catalytic potential enhanced by the addition of the pyridyl arm to a reinforced cyclen backbone. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Polyhedron is the property of Pergamon Press - An Imprint of Elsevier Science 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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=116131628
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.poly.2015.11.014
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 118
    Subjects:
      – SubjectFull: Pyridine
        Type: general
      – SubjectFull: Heterocyclic compounds
        Type: general
      – SubjectFull: Iron chelates
        Type: general
      – SubjectFull: Transition metals
        Type: general
      – SubjectFull: Metal ions
        Type: general
    Titles:
      – TitleFull: Synthesis and structural studies of two pyridine-armed reinforced cyclen chelators and their transition metal complexes.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Wilson, Kevin R.
      – PersonEntity:
          Name:
            NameFull: Cannon-Smith, Desiray J.
      – PersonEntity:
          Name:
            NameFull: Burke, Benjamin P.
      – PersonEntity:
          Name:
            NameFull: Birdsong, Orry C.
      – PersonEntity:
          Name:
            NameFull: Archibald, Stephen J.
      – PersonEntity:
          Name:
            NameFull: Hubin, Timothy J.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 16
              M: 08
              Text: Aug2016
              Type: published
              Y: 2016
          Identifiers:
            – Type: issn-print
              Value: 02775387
          Numbering:
            – Type: volume
              Value: 114
          Titles:
            – TitleFull: Polyhedron
              Type: main
ResultId 1