Geometric isomers of cobalt(II) and cobalt(III) picolinates in solution

Authors
Novitski, G Silagi-Dumitresku, I Paraskivesku, A Gulya, A
Citation
G. Novitski et al., Geometric isomers of cobalt(II) and cobalt(III) picolinates in solution, RUSS J C CH, 27(10), 2001, pp. 722-725
Citations number
18
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
RUSSIAN JOURNAL OF COORDINATION CHEMISTRY
ISSN journal
10703284 → ACNP
Volume
27
Issue
10
Year of publication
2001
Pages
722 - 725
Database
ISI
SICI code
1070-3284(200110)27:10<722:GIOCAC>2.0.ZU;2-7
Abstract
Cobalt complexes with picolinic acid (HPic), namely, [Co-II(Pic)(2)(H2O)] . 2H(2)O (I) and [COIII(Pic)(3)] . H2O (II) are studied using H-1 and C-13 N MR spectroscopy. Compound I exists in solution as three geometric isomers, namely, trans-trans-trans, cis-trans-cis, and trans-cis-cis (molar ratio 4 : 2 : 1, respectively). According to C-13 NMR data, compound II exists in s olution as a mer-isomer. The relative energy stability of the isomers was e stimated using the molecular mechanics method.