Crystal circular dichroism and spin-forbidden optical activity of tris-(diamine)cobalt(III) complexes
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 9,p. 937-941
- https://doi.org/10.1039/dt9770000937
Abstract
The axial crystal circular dichroism spectrum of 2{Λ(+)[Co(en)3]Cl3}·NaCl·6H2O (en = ethylenediamine) at liquid-nitrogen and ambient temperature has been measured. together with the corresponding aqueous-solution spectrum and those of Λ(+)[Co{(S)(pn)}3]3+ and Λ(–)[Co(pd)3]3+. over the range 500–1 000 nm (pn = propylenediamine and pd = propane-1,3-diamine). The optical activity associated with the spin-forbidden transitions to the 3T1 and 3T2: octahedral states has distinctive features which are accounted for satisfactorily by spin–orbit coupling between these states and, principally, the corresponding 1T1 state.Keywords
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