ISSN:
0018-019X
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Oxygenation of solutions containing bis(ethylenediamine) cobalt(II) ions leads to a mixture of diastereomeric forms of μ-peroxo-μ-hydroxo-bis[bis(ethylenediamine) cobalt(III)] cations. The existence of a meso-isomer has now been proved by its isolation as perchlorate and by an X-ray structure determination. The crystals are monoclinic with space group P21/n and lattice constants: a = 19.280, b = 11.984, c = 11.654 Å, β = 99.190°.The UV./VIS. spectra of the isomers are practically identical but show different kinetic behaviour. In acidic solution the meso-isomer decomposes 4 times faster than the racemic form. In alkaline solution the meso-isomer isomerizes to the racemic form. A mechanism which explains all the kinetic observations has been devised.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hlca.19800630619