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PRODUCERS
OF
reports
of glutaraldehyde with methylamine hydrochloride and acetone dicarboxylic acid, and proceeding with the original reactions. Ample evidence indicated identity of this product with that from acetylene, and its variation in melting point from that of the original COT was attributed to the fact that the latter was not purified by fractional distillation. In addition, Cope and Bailey prepared 1,5-cyclo-octadiene more simply from the dimer of chloroprene (2-chloro-l,3-butadiene), dibrominated this, and proceeded from that point by the Willstâtter reactions to COT. Work is being continued at M.I.T. Examination of COT by Reppe indicated that his product was the same as that of Willstàtter, and has also produced substantial evidence that the compound is the symmetrical ring 1,3,5,7-cyclo-octatetraene and that it is aliphatic rather than aromatic in nature. However, it was also shown that it can react to yield derivatives of three fundamental structure types:
SULPHUR
II II
1,3,5,7-Cyclooctatetraene
H—C
C—C—H
H-C
c—C—H
VC I, Large stocks carried at all times,
Η
permitting prompt shipments
II.
Bicyclo [0,2,4]2,4,7-octatriene
II
Η
U, II—C
C—H II
W Uniformly high purity
I
I
H
H
of 99V2% or better
II
I C-H
H III.
Free of arsenic, selenium and tellurium.
VI
1,2,4,5-Dimetliylene2,5-cyclohexadiene
H-C
II
/
Ο Ι
C II C-H
Il C \
II
îr
TEXAS GULF SULPHUR CO., INC. 75E.45" Street ^ 5 5 ^ New York 17,NY. Mine: Newgulf, Texas
|l*c
8A
Extensive thermochemical studies arc in progress at the National Bureau of Standards under Rossini, Prosen, and Johnson, who have recently reported measurements of heats of formation and combustion and have concluded COT to be less stable than styrene. Controversy over the spatial arrangement of the atoms within COT is not yet settled to the satisfaction of all investigators. Two forms, a "tub" and a "crown," are now being supported. It has even been suggested that two forms may exist. Work relative to this question has been reported from England and Norway, as well as from this country. (Continued on page 10 A)
