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On the Optical Activity of Steroidal 5,7-Dienes

R. B. Koolstra ; Gorlaeus Laboratories, Leiden University, Department of Chemistry, PO Box 9502, 2300 RA Leiden, The Netherlands
H. J. C. Jacobs ; Gorlaeus Laboratories, Leiden University, Department of Chemistry, PO Box 9502, 2300 RA Leiden, The Netherlands
H. P. J. M. Dekkers ; Gorlaeus Laboratories, Leiden University, Department of Chemistry, PO Box 9502, 2300 RA Leiden, The Netherlands

Puni tekst: engleski, pdf (6 MB) str. 115-128 preuzimanja: 71* citiraj
APA 6th Edition
Koolstra, R.B., Jacobs, H.J.C. i Dekkers, H.P.J.M. (1989). On the Optical Activity of Steroidal 5,7-Dienes. Croatica Chemica Acta, 62 (2A), 115-128. Preuzeto s https://hrcak.srce.hr/175386
MLA 8th Edition
Koolstra, R. B., et al. "On the Optical Activity of Steroidal 5,7-Dienes." Croatica Chemica Acta, vol. 62, br. 2A, 1989, str. 115-128. https://hrcak.srce.hr/175386. Citirano 23.09.2020.
Chicago 17th Edition
Koolstra, R. B., H. J. C. Jacobs i H. P. J. M. Dekkers. "On the Optical Activity of Steroidal 5,7-Dienes." Croatica Chemica Acta 62, br. 2A (1989): 115-128. https://hrcak.srce.hr/175386
Harvard
Koolstra, R.B., Jacobs, H.J.C., i Dekkers, H.P.J.M. (1989). 'On the Optical Activity of Steroidal 5,7-Dienes', Croatica Chemica Acta, 62(2A), str. 115-128. Preuzeto s: https://hrcak.srce.hr/175386 (Datum pristupa: 23.09.2020.)
Vancouver
Koolstra RB, Jacobs HJC, Dekkers HPJM. On the Optical Activity of Steroidal 5,7-Dienes. Croatica Chemica Acta [Internet]. 1989 [pristupljeno 23.09.2020.];62(2A):115-128. Dostupno na: https://hrcak.srce.hr/175386
IEEE
R.B. Koolstra, H.J.C. Jacobs i H.P.J.M. Dekkers, "On the Optical Activity of Steroidal 5,7-Dienes", Croatica Chemica Acta, vol.62, br. 2A, str. 115-128, 1989. [Online]. Dostupno na: https://hrcak.srce.hr/175386. [Citirano: 23.09.2020.]

Sažetak
Circular dichroism (CD) data are reported of a series of 9,10-
stereoisomeric steroidal 5,7-dienes. In general the effects in the
longest wavelength transition (270-280 nm) are large (Mm" 10---30)
and consignate with respect to the diene helicity rule. The magnitude
of the CD appears to vary markedly with the substituent at C-3 and at C-17, and with solvent. In the case of the 9a,10p-H dienes, variation of solvent and temperature can affect even the sign of the Cotton effect. This is explained from a change of geometry of the diene ring: solvation, substitution and temperature can affect the average geometry of the ring including the values of the angle of twist of the diene (ef> (6-7». The relevance of the observed chiroptical data for the theoretical description of the optical activity in the So-+ Sl transition of homoannular cisoid dienes is discussed.

Hrčak ID: 175386

URI
https://hrcak.srce.hr/175386

Posjeta: 141 *