-
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...
-
thousand naturally occurring acetylenes have been
discovered and reported.
Polyynes, a
subset of this
class of
natural products, have been
isolated from a...
- atoms,
connected by
alternating triple and
single bonds; thus, it is a
polyyne and a cyclocarbon. Cyclo[18]carbon is the
smallest cyclo[n]carbon predicted...
-
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...
- Copper(I)
acetylide is the
substrate of
Glaser coupling for the
formation of
polyynes. In a
typical reaction, a
suspension of Cu2C2·H2O in an
amoniacal solution...
- Apiaceae,
including carrot, celery, fennel,
parsley and parsnip,
contain polyynes, an
unusual class of
organic compounds that
exhibit cytotoxic effects....
- (−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...
-
polyacetylenes also
occur in nature,
although in this
context the term
refers to
polyynes,
compounds containing multiple acetylene groups ("poly"
meaning many),...
-
potential nutraceuticals.
Falcarindiol is the most-active
among several polyynes found in Devil's club (Oplopanax horridus) that
inhibit cell proliferation...
