-
attached to the "axial sites" of the iron. The
porphyrin ring is a
planar dianionic,
tetradentate ligand. The iron is
typically Fe2+ or Fe3+. One or two ligands...
- electrophiles.
Being dianionic,
tetrachlorozincate is not
classified as a
weakly coordinating anion. On the
other hand,
being dianionic, tetrachlorozincate...
-
monoanionic monodentate Sulfide (thio or less
commonly "bridging thiolate") S2−
dianionic monodentate (M=S), or
bidentate bridging (M−S−M')
Thiocyanate (S-thiocyanato)...
-
innocuous products: 2 N2O → 2 N2 + O2 The
anionic (HO2C(CH2)4CO2−) and
dianionic (−O2C(CH2)4CO2−)
forms of
adipic acid are
referred to as adipates. An...
-
monoanionic form (yellow), that
further deprotonates at
higher pH to give the
dianionic form (blue),
which is
stabilized by resonance: The acid
dissociation constant...
- Both
porphyrins and
phthalocyanines function as
planar tetradentate dianionic ligands that bind
metals through four
inwardly projecting nitrogen centers...
- π-electrons,
fulfilling the
IUPAC definition of antiaromaticity. Pentalene’s
dianionic and
dicationic states are aromatic, as they
follow Hückel’s 4n +2 π-electron...
- the
actinide series. They
typically have a
sandwich structure with two
dianionic cyclooctatetraenyl ligands (COT2-,
which is C 8H2− 8)
bound to an actinide-metal...
- as
leaving groups in SN2 reactions. On the
other hand, when
anionic or
dianionic tetrahedral intermediates collapse, the high
electron density of the neighboring...
-
isotopic effects and
quantum calculations to
reveal a
completely dissociated dianionic orotate structure, a ribocation, and a
nucleophilic pyrophosphate molecule...
