(mu(2)-RC(2)R')Co-2(CO)(6) complexes are prepared where R not equal R' and one of these substituents is a chiral organic group. The structures of the 11 complexes (10 new) range from the simplest possible chiral acetylenic hydrocarbon derivative (S-3-methyl-1-pentyne 1a) to ethynylsteroid (1f, 1g, 1h) and ethynylcodeine (1i, 1j, 1k) derivatives. The CD spectra are reported and the results are analysed in terms of a quadrant rule. The CD spectra show that in all complexes the Co-2(CO)(6) fragment of the molecule gets chirally perturbed. The reasons for the chiral perturbation include apolar repulsing (dominant for the hydrocarbon acetylenes) and polar attractive (''autosolvation''; dominant for acetylenes with polar hetero-atom containing substituents) forces.

DICOBALT HEXACARBONYL DERIVATIVES OF CHIRAL ACETYLENES / M., Kajtar; J., Kajtarmiklos; G., Giacomelli; G., Gaal; G., Varadi; I. T., Horvath; C., Zucchi; Palyi, Gyula. - In: TETRAHEDRON-ASYMMETRY. - ISSN 0957-4166. - 6:(1995), pp. 2177-2194.

DICOBALT HEXACARBONYL DERIVATIVES OF CHIRAL ACETYLENES

PALYI, Gyula
1995

Abstract

(mu(2)-RC(2)R')Co-2(CO)(6) complexes are prepared where R not equal R' and one of these substituents is a chiral organic group. The structures of the 11 complexes (10 new) range from the simplest possible chiral acetylenic hydrocarbon derivative (S-3-methyl-1-pentyne 1a) to ethynylsteroid (1f, 1g, 1h) and ethynylcodeine (1i, 1j, 1k) derivatives. The CD spectra are reported and the results are analysed in terms of a quadrant rule. The CD spectra show that in all complexes the Co-2(CO)(6) fragment of the molecule gets chirally perturbed. The reasons for the chiral perturbation include apolar repulsing (dominant for the hydrocarbon acetylenes) and polar attractive (''autosolvation''; dominant for acetylenes with polar hetero-atom containing substituents) forces.
6
2177
2194
DICOBALT HEXACARBONYL DERIVATIVES OF CHIRAL ACETYLENES / M., Kajtar; J., Kajtarmiklos; G., Giacomelli; G., Gaal; G., Varadi; I. T., Horvath; C., Zucchi; Palyi, Gyula. - In: TETRAHEDRON-ASYMMETRY. - ISSN 0957-4166. - 6:(1995), pp. 2177-2194.
M., Kajtar; J., Kajtarmiklos; G., Giacomelli; G., Gaal; G., Varadi; I. T., Horvath; C., Zucchi; Palyi, Gyula
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/306656
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