Circular dichroism spectra of asymmetric unidentate amine complexes of cobalt(III)
Keyword(s):
The preparations of pentaamminecobalt(III) complexes of a series of asymmetric unidentate amines are reported. The circular dichroism spectra for the (S)-amines show negative Cotton effects under the 1A1g → 1T1g absorption band, which are somewhat solvent dependent but independent of temperature down to -190�C. The vicinal effect from 1- cyclohexylethylamine was comparable to that from analogous aromatic compounds, but the simpler alkyl derivatives were found to impose smaller rotational strengths on the d-d transitions. The lack of measurable c.d. in the visible region for tetraammine((S)-butane-1,3- diamine)cobalt(III) is reported and discussed in the light of the other studies.
1986 ◽
Vol 59
(7)
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pp. 2151-2155
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1990 ◽
Vol 44
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pp. 42-49
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1981 ◽
Vol 36
(6)
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pp. 735-738
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1981 ◽
Vol 54
(11)
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pp. 3351-3360
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