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Transition Metal Chemistry

, Volume 16, Issue 2, pp 176–180 | Cite as

Crystal structure oftrans-ethyl(1,5,6-trimethylbenzimidazole)-bis(dimethylglyoximato)cobalt(III). Relationships between structural and spectroscopic properties in compounds of the general formulae [Co(dmgH)2(R)(1,5,6-Me3Bzm)]

  • Xavier Solans
  • Montserrat Gómez
  • Concepción López
Full Papers

Summary

The synthesis and x-ray crystal structure oftrans-[Co(dmgH)2(Et)(1,5,6-Me3Bzm)] where dmgH=dimethylglyoximate(−1), and 1,5,6-Me3Bzm=1,5,6-trimethylbenzimidazole, is reported. The compound C19H26N6O4Co is monoclinic, space group P21/n;a=11.700(4);b=24.205(6);c=8.500(3) Å and β=101.63(3)°. D(calcd) 1.299 g cm−3; Z=4 and R=0.066 for 2359 independent reflections. Comparison of Co-N(axial ligand) bond lengths for compounds of general formulaetrans-[Co(dmgH)2(R)(L)], with L=pyridine or 1,5,6-trimethylbenzimidazole and R=CH(CN)Cl, CH2NO2, Me, Et,i-Pr, cyclo-hexyl or adamantyl is made. The Co−N(1,5,6-Me3Bzm) bond lengths of the trimethylbenzimidazole derivatives show a fairly linear relationship with the electronic parameter of the axial R group, derived from the13C-n.m.r. spectra of their pyridine analogues. The influence of steric effects on the properties of these CoIII compounds is discussed.

Keywords

Reflection Crystal Structure Cobalt Inorganic Chemistry Catalysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd 1991

Authors and Affiliations

  • Xavier Solans
    • 1
  • Montserrat Gómez
    • 2
  • Concepción López
    • 2
  1. 1.Department de Cristal·lografia, Mineralogia i Dipòsits MineralsUniversitat de BarcelonaBarcelonaSpain
  2. 2.Department de Química Inorgánica. Facultat de QuímicaUniversitat de BarcelonaBarcelonaSpain

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