- also
means "construction of
benzene rings from
acyclic precursors". A
transannular interaction in
chemistry is any
chemical interaction (favorable or nonfavorable)...
- In
organic chemistry,
transannular strain (also
called Prelog strain after chemist Vladimir Prelog) is the
unfavorable interactions of ring substituents...
- It is a
heterocyclic structure similar to the propellanes. It has a
transannular dative bond from a
nitrogen at one
bridgehead to a
Lewis acidic atom...
-
calculations indicate that
transannular strain, also
known as
Prelog strain, does not play an
essential role.
Transannular reactions however, such as...
-
conformational strain or
Pitzer strain (torsional
eclipsing interactions), and
transannular strain, also
known as van der
Waals strain or
Prelog strain. The simplest...
- (prepared in situ from
chloroform and pot****ium tert-butoxide) to form a
transannular cyclopropane ring. A
second reduction then
removes the
chloride substituents...
- n-membered ring with kâ2
transannular bonds 6n â 4 n-membered ring with 2
transannular bonds 6n â 2 n-membered ring with 1
transannular bond 6n n-membered ring...
-
inversion of bicyclobutane,
proceeding via
homolytic cleavage of the
transannular carbon-carbon bond (Figure 3). A 1,3-dimethyl
substituted derivative...
- conformations, with
preferences to
reside in
those that
minimize the
number of
transannular nonbonded interactions within the ring.
Medium rings (8-11 atoms) are...
-
carbon atoms)
conformations in
which the
angle strain is
minimised create transannular strain or
Pitzer strain. At
these ring sizes, one or more of
these sources...
