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Solvent-directed conformational variation of Co(ii)/(iii) complexes with a diiminopyridine ligand

CrystEngComm, ISSN: 1466-8033, Vol: 12, Issue: 10, Page: 2755-2761
2010
  • 17
    Citations
  • 0
    Usage
  • 7
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    17
    • Citation Indexes
      17
  • Captures
    7

Article Description

The reaction of CoCl·6HO or Co(NO )·6HO with a semi-rigid ditopic ligand 2,6-bis(1-(2,6-diisopropyl-4-(pyridin-3-yl)phenylimino)ethyl)pyridine (L) in various solvent systems led to four complexes, {[CoClL ]·CHCl} (1a), {[Co(NO)L]·CHCl } (1b), {[Co(μ-Cl) (μ-L)Cl]·xH O} (2), and [Co(NO) L(CHCN)]·xHO (3). Compounds 1a and 1b are isostructural 1D looped-chain coordination polymers constructed by 44-membered [CoL] macrocyclic units. Compound 2 shows an unprecedented double μ-Cl bridged 1D chain structure containing 36-membered [CoL] macrocycles. Interestingly, the Co(ii) ions are partially oxidized to form the Co Cl bridges, and the [CoL] metallocycles are linked by these Co Cl units to generate the 1D chain. Compound 3 is a discrete 0D 36-membered metallomacrocycle comprised of four Co(ii) ions and two bridging ligands. The structural variation of the complexes is related to the conformational changes of the semirigid ligand L induced by different solvent systems. © 2010 The Royal Society of Chemistry.

Bibliographic Details

Biao Wu; Yanyan Liu; Fuyu Zhuge; Xiao Juan Yang; Jin Yang; Ning Tang

Royal Society of Chemistry (RSC)

Chemistry; Materials Science; Physics and Astronomy

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