Synthesis of trans(N)-Carbonatobis(N,N-dimethylglycinato)cobaltate(III) by Decarboxylation of N,N-Dimethylglycine
- 1 January 1994
- journal article
- research article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 67 (1), 108-112
- https://doi.org/10.1246/bcsj.67.108
Abstract
Trans(N)-[Co(CO3)(dmgly)2]− and trans(N)-[Co(ox)(dmgly)2]− were prepared and characterized by absorption, circular dichroism, 1H NMR, and 13C NMR spectra, where Hdmgly and H2ox denote N,N-dimethylglycine and oxalic acid, respectively. The carbonato complex was yielded by the reaction of [CoCl(NH3)5]Cl2 and Hdmgly without addition of carbonate or hydrogencarbonate ions; decarboxylation of Hdmgly followed by substitution with CO32− was suggested. The molecular structure of spontaneously resolved (+)589-trans(N)-K[Co(CO3)(dmgly)2]·H2O was determined by the single crystal X-ray diffraction method. The crystal data and final R value are: orthorhombic, P212121, a = 15.483(1), b = 15.624(2), c = 6.092(1) Å, V = 1473.7(3) Å3, Z = 4, R = 0.022 for 2390 reflections. The crystal used had the Λ configuration. The mean Co–N bond length, 1.996 (2) Å is longer than the usual Co–N (primary amine) bond length by 0.03—0.08 Å due to the steric repulsion between the methyl groups and other ligands.Keywords
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