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Divinylglyoxal and Methylvinylglyoxal
Author(s) -
Kramme Roland,
Martin HansDieter,
Mayer Bernhard,
Weimann Ralf
Publication year - 1986
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198611161
Subject(s) - benzil , chemistry , alkane stereochemistry , pyrolysis , stereochemistry , organic chemistry , molecule , catalysis
The two simplest unsaturated glyoxals 1 and 2 have been prepared by gasphase pyrolysis from 5‐norbornen‐2‐yl‐CO‐CO‐R, R5‐norbornen‐2‐yl and Me, respectively. The UV and PE spectra of the yellow diones 1 and 2 reveal a preferred conformation in which the carbonyl groups—in contrast to those in benzil—are arranged in a nearly antiperiplanar fashion.