Optisch aktive aromatische Spirane, 19. Mitt. Ermittlung von optimalen ?-Werten bei tri- bis polysubstituierten 2,2?-Spirobiindanen

Autor: Horst Neudeck
Rok vydání: 1995
Předmět:
Zdroj: Monatshefte f�r Chemie Chemical Monthly. 126:1125-1144
ISSN: 1434-4475
0026-9247
DOI: 10.1007/bf00811382
Popis: Nearly all ligand parameters λ which were empirically determined from disubstituted 2,2′-spirobiindanes proved to be inaccurate for the calculation of the optical rotations of the title compounds by means of the so-called “shortened approach”, especially in the case ofo-alkylsubstituted carbonyl derivates. The modified parameters λ were now determined either by comparison of a series of similar substituted spirocompounds or — for the carbonyl derivates — from the torsional angles calculated from their13C NMR data.
Databáze: OpenAIRE
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