As anticipated, substitution on the aromatic ring
with an electrondonating group ([Et.
However, the lack of a signal of an aldehyde function indicates that it is this material that can have self-polymerized as well as possibly having reacted on sites of the aromatic ring
1972) showed that substituted oxazoles could accept an electron into the pi-system and form stable anion pi-radicals if the oxazole ring is 2,5-substituted by aromatic rings
The explanation of these results is that Clay-NCP contains an aromatic ring
in its chemical structure which may enhance the interaction between bromoxynil molecules and Clay-NCP molecules.
Part of pyridinic nitrogen present in kerogen can be directly transformed into the pyridinic type compounds containing a single aromatic ring
, or several aromatic rings
These isocoumarins are structurally similar to paepalantine but have different chemical groups at positions 9 and/or 10 of the aromatic ring
The mechanism is highly analogous to that which occurs in toluene because of the position of the methyl group on an aromatic ring
8 ppm, consistent with the shifts of amide protons in the aromatic ring
For D-thyroxine, previous researchers found that the magnitude of the peak in the CD spectrum associated with aromatic ring
A was reduced in magnitude but was still negative, whereas the peak associated with aromatic ring
B was reduced in magnitude and became positive, indicating an altered orientation of aromatic ring
B for nthyroxine bound to wild-type HSA (commercial).
Chemical structure of S-EED consists of two tetramethyl piperidine HALS groups chemically bound to an aromatic ring
Furthermore, ihe corresponding characteristic absorption of the monomers resulting from aromatic ring
are evident for the plasma polycyanurates, although broadening effects characteristic to the plasma polycyanurates were observed.
Hydrodenitrogenation is believed to require complete hydrogenation of aromatic rings
because C-N bonds in an aromatic ring
are much stronger than in the naphthenic structure.
This type of behaviour is usually observed only with highly acidic C-H bonds, however the McBreen group postulates that adsorption to the Pt surface results in a polarization of the aromatic ring
and a resultant increase in C-H acidity.
When the side group on the methylene chain is an aromatic ring
, the infrared spectrum becomes a combination of methylene and mono-substituted aromatic ring
The amino acid L-alanine, which does not contain the aromatic ring
of the Phe side chain because of the presence of the amino group, exhibited a measurable percentage of DNA peak exclusion.