Structural Study of Optical Resolution. IV-b. The Crystal Structure of (+)589-Oxalatobis(ethylenediamine)cobalt(III) Hydrogen-d-tartrate Monohydrate and Its Thermal Behavior
- 1 November 1978
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 51 (11) , 3251-3256
- https://doi.org/10.1246/bcsj.51.3251
Abstract
The crystal structure of (+)589-oxalatobis(ethylenediamine)cobalt(III) hydrogen-d-tartrate monohydrate, (+)589-[Co(ox)en2]H-d-tart·H2O, has been determined by three-dimensional X-ray analysis. The red crystals are monoclinic, space group P21 with two molecules in a unit cell of dimensions a=8.27(1), b=14.60(1), c=7.02(1) Å, and β=104.8(2)°. The structure was solved by Patterson and Fourier methods, and refined by anisotropic blockdiagonal least-squares to a conventional R-value of 0.100 for the 1265 independent reflections observed. In the diastereoisomer, the optically active complex cation is locked by the {H-d-tart}∞ units of the right-handed spiral chains formed along the b-axis. The TG and DSC measurements have been carried out on both less- and more-soluble diastereoisomers of oxalatobis(ethylenediamine) cobalt (III) hydrogen-d-tartrate; the difference of their thermal behavior is discussed.Keywords
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