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Alkine und Cumulene, XXI. über einige neue Oligomere des Allens
Author(s) -
Hopf Henning,
Kretschmer Olaf,
Ernstb Ludger
Publication year - 1990
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19901230534
Subject(s) - chemistry , allene , random hexamer , cumulene , trimer , cyclooctane , stereochemistry , dimer , molecule , crystallography , organic chemistry , catalysis
Alkynes and Cumulenes XXI 1) . – On Some New Oligomers of Allene The thermaloligomerization of allene ( 1 ) in the gas phase has been reinvestigated. AT 260°C and low conversions, 1,6,7‐trimethylenespiro[3.5]nonan ( 14 ) and 1,2,5,6‐tetramethylene cyclooctane ( 15 ) have been detected besides the already known thermal oligomers 2 ‐ 8 , increase of substrate concentration and reaction time lead to significant amounts of a hexamer fraction which contains the new allene oligomers 16 ‐ 23 according to sepctroscopic analysis, Possible routes of formation of the unusual hexamers 16 and 20 are discussed.