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Chiroptische Eigenschaften und absolute Konfiguration von 9, 9′‐Spirobifluoren‐Derivaten
Author(s) -
Haas G.,
Hulbert P. B.,
Klyne W.,
Prelog V.,
Snatzke G.
Publication year - 1971
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19710540208
Subject(s) - chemistry , optical rotatory dispersion , circular dichroism , absolute configuration , cotton effect , stereochemistry , absolute (philosophy) , vibrational circular dichroism , crystallography , philosophy , epistemology
The circular dichroism and optical rotatory dispersion of three vespirenes, three vespirones, and of some related 9, 9′‐spirobifluorene derivatives [4] have been measured. The absolute configurations of these compounds have been determined from chiroptical properties (CU., ORD.) in four ways which give mutually consistent results. For the (−)‐vespirenes the (R)‐configuration (Figs. 1 and 2) follows from 1 is treatment.