- In
organic chemistry, anti-
periplanar, or antiperiplanar,
describes the A−B−C−D bond
angle in a molecule. In this conformer, the
dihedral angle of the...
- Stereochemistry, a
subdiscipline of chemistry,
studies the
spatial arrangement of
atoms that form the
structure of
molecules and
their mani****tion. The...
-
clinal (c) a
torsion angle between 0° and ±30° or ±150° and 180° is
called periplanar (p) a
torsion angle between 0° and ±30° is
called synperiplanar (sp),...
-
stereochemistry of the
starting material. E2
eliminations require anti-
periplanar geometry, in
which the
proton and
leaving group lie on
opposite sides...
-
ketoximes and N-chloro/N-fluoro imines, with the
migrating group being anti-
periplanar to the
leaving group on the nitrogen.
Certain conditions have been known...
-
depending on the enantiomer), anti
butane is anti-
periplanar, and
eclipsed butane is syn-
periplanar. Klyne, W &
Prelog V.
Description of
steric relationships...
-
clinal (c) and
those between 0° and ±30° or ±150° and 180° are
called periplanar (p). The two
types of
terms can be
combined so as to
define four ranges...
-
pyranosides is unreactive.
Hyperconjugation is
involved when OH-4 is anti-
periplanar to the ring oxygen,
which can also
reduce its reactivity. (Scheme 3) Furthermore...
- one from
equatorial glycosides as long as the
donating orbital is anti-
periplanar to the
accepting orbital.
Three angles are
described by φ, ψ and ω (in...
- 1,3-dioxane is
formed between O-4 and O-6, the
oxygens adapt an anti-
periplanar geometry with O-5. This
orientation allows for
hyperconjugation of O-5...
