-
replaced carbon in the
backbone of the
molecular structure.
Typical heteroatoms are
nitrogen (N),
oxygen (O),
sulfur (S),
phosphorus (P),
chlorine (Cl)...
- five
heteroatoms The
hypothetical chemical compound with five
nitrogen heteroatoms would be pentazine. Six-membered
rings with six
heteroatoms The hypothetical...
- (i.e. with "C"),
whereas heteroatoms are
always explicitly noted as such ("N" for nitrogen, "O" for oxygen, etc.)
Heteroatoms and
other groups of atoms...
-
double bonds (alkenes) or
triple bonds (alkynes). If
other elements (
heteroatoms) are
bound to the
carbon chain, the most
common being oxygen, nitrogen...
-
carbon atoms and
heteroatoms ("ring size") the
presence of any
double bonds the
nature of the
heteroatoms.
Notes on table:
Heteroatom priority decreases...
- atoms. It
should have the
maximum number of
heteroatoms. It
should have the
maximum number of
senior heteroatoms (in order: O, S, N, P, Si, B). For chains:...
- In chemistry, a
double bond is a
covalent bond
between two
atoms involving four
bonding electrons as
opposed to two in a
single bond.
Double bonds occur...
-
unsaturated substrates, both
olefinic or
aromatic and with or
without heteroatoms. Free-radical
reactions depend on one or more
relatively weak
bonds in...
- (C4H4O),
selenophene (C4H4Se) and
pyrrole (C4H4NH),
which each vary by the
heteroatom in the ring.
Thiophene was
discovered by
Viktor Meyer in 1882 as a contaminant...
- h-bond), and the
hydrogen ion
clearly belongs to one of the
heteroatoms. When pKa of the
heteroatoms is
closely matched, a LBHB
becomes possible at a shorter...
