-
group remains on the same face of the π system, the
shift is
known as
suprafacial,
while if the
migrating group transfers to the
opposite face is called...
- In
organic chemistry,
antarafacial (Woodward-Hoffmann
symbol a) and
suprafacial (s) are two
topological concepts in
organic chemistry describing the relationship...
-
antarafacial or
suprafacial. In the
example of a [1,5]
shift in pentadiene, if
there is a
suprafacial shift,
there is 6 e−
moving suprafacially and none moving...
-
known as a component, and each
component is said to be
antarafacial or
suprafacial depending on
whether the
orbital lobes that
interact during the reaction...
-
heptafulvalene and N-phenyltriazolinedione also gave both
suprafacial-antarafacial and
suprafacial-
suprafacial products.
Cycloadditions in
which 4n π electrons...
-
components must
interact in a
suprafacial manner (or one
suprafacial and two antarfacial). With all
components being suprafacial, the
allowed transition state...
- process.
According to the Woodward–Hoffmann rules, this
addition is
suprafacial with
respect to both the
dipole and dipolarophile. The
reaction is generally...
-
liquid state. The
single molecular tautomerisation has a
forbidden 1-3
suprafacial transition state and
therefore has a high
energy barrier for this tautomerisation...
- be
envisaged as a
disrotatory electrocyclic reaction,
followed by two
suprafacial 1,5-sigmatropic
hydrogen shifts, as
shown below. An
often studied electrocyclic...
-
described as
cationic [1,2]-sigmatropic rearrangements,
proceeding suprafacially and with
stereochemical retention. As such, a Wagner–Meerwein shift...
