-
attempts would be
called polyynes today. The
simplest polyyne is
diacetylene or butadiyne, H−C≡C−C≡C−H.
Along with ****ulenes,
polyynes are
distinguished from...
-
simplest compound containing two
triple bonds. It is
first in the
series of
polyynes,
which are of
theoretical but not of
practical interest.
Diacetylene has...
- (−C≡C−)n
chains are well
established as
substructures of
larger molecules (
polyynes). As of 2010, the
longest such
chain in a
stable molecule had 22 acetylenic...
-
thousand naturally occurring acetylenes have been
discovered and reported.
Polyynes, a
subset of this
class of
natural products, have been
isolated from a...
-
structural formula H−[C≡C−]nC≡N (n = 1,2,3,…). Structurally, they are
polyynes with a
cyano group (−C≡N)
covalently bonded to one of the
terminal acetylene...
- Apiaceae,
including carrot, celery, fennel,
parsley and parsnip,
contain polyynes, an
unusual class of
organic compounds that
exhibit cytotoxic effects....
-
Copper acetylide is the
substrate of
Glaser coupling for the
formation of
polyynes. In a
typical reaction, a
suspension of Cu 2C 2.H 2O in an
amoniacal solution...
-
studies of
plant natural products chemistry,
especially terpenoids and
polyynes.
Bohlmann studied chemistry in Göttingen from 1939 to 1944 . His studies...
-
poultry in
parts of
their bodies where their skin is exposed.: 221–222
Polyynes can be
found in
Apiaceae vegetables such as parsnip, and they show cytotoxic...
-
Unlike most
alkanes and alkenes, ****ulenes tend to be rigid,
comparable to
polyynes. ****ulene
carbenes H2Cn for n from 3 to 6 have been
observed in interstellar...
