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


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.


Reflection Crystal Structure Cobalt Inorganic Chemistry Catalysis 
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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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