-
where one of the
single bonds is to a hydrogen. The
group is also
called methyne or methene, but its
IUPAC systematic name is
methylylidene or methanylylidene...
-
porphyrin ligands, TPP2− is
highly symmetrical.
Another difference is that its
methyne centers are
occupied by
phenyl groups.
Simplified view of heme, a complex...
-
Malonic acid
Acetylacetone Malononitrile Methyl group Methylene group Methyne W. A.
Herrmann (1982), "The
methylene bridge". In
Advances in Organometallic...
-
heterocyclic core of the
molecule is
readily substituted at the
unique methyne centre in the
thiazole ring. It is a
thermally stable electron-withdrawing...
-
feature of the
dithiolanes and
dithianes derived from
aldehydes is that the
methyne group can be
deprotonated and the
resulting carbanion alkylated. 1,2-Ethanedithiol...
- methyl, –CH3), 15–55 (secondary, methylene, –CH2–), 20–60 (tertiary,
methyne, C–H) and quaternary. The carbon-13
resonance of
quaternary carbon atoms...
- some D-amino acid residues.
Racemization occurs via
deprotonation of the
methyne that is
alpha to the
amido group.
Rates increase with pH. Many D-amino...
-
whose skeleton can be
described as two
pyrrole rings C 5N
connected by a
methyne bridge =CH–
through their nitrogen-adjacent (position-2) carbons; the remaining...
-
treatment with
ketones and aldehydes. When
derived from aldehydes, the
methyne (=CH−)
group is
sufficiently acidic that it can be
deprotonated and the...
- McMurry's in-bicyclo[4.4.4]-tetradecyl cation, the
alkene across from the
methyne hydrogen was
protonated by
trifluoroacetic acid (TFA) to
allow a bridge...
