-
Pyrylium is a
cation (positive ion) with
formula C5H5O+,
consisting of a six-membered ring of five
carbon atoms, each with one
hydrogen atom, and one positively...
-
analogous to the
pyrylium cation with the
oxygen atom
replaced by a
sulfur atom.
Thiopyrylium salts are less
reactive than the
analogous pyrylium salts due to...
- and
chromenylium (also
called benzopyrylium) is a
bicyclic version of
pyrylium. The
positive charge can move
around the molecule. At
least 31 monomeric...
- 4H-pyran
easily disproportionates to the
corresponding dihydropyran and the
pyrylium ion,
which is
easily hydrolyzed in
aqueous medium.
Although the pyrans...
-
Pyrylium-1 (Py-1) is a
fluorogenic salt of a
pyrylium derivative and tetrafluoroborate. It is an amine-labeling dye that is not
fluorescent itself, but...
-
synthesized by
Gottfried Märkl in 1966 by
condensation of the
corresponding pyrylium salt and
phosphine or its
equivalent ( P(CH2OH)3 and P(SiMe3)3). The (unsubstituted)...
- borabenzene, silabenzene, germanabenzene, stannabenzene,
phosphorine or
pyrylium salts the
aromaticity is
still retained.
Aromaticity also
occurs in compounds...
- the DPDB
ligand Another synthesis route starts from the of
pyridinium or
pyrylium salts with
cyclopentadienyl anion:
Azulene can also be
synthesized via...
- germabenzene, stannabenzene, pyridine, phosphorine, arsabenzene, bismabenzene,
pyrylium, thiopyrylium, selenopyrylium,
telluropyrylium Critics pointed out a problem...
-
Triphenylcarbenium (C6H5)3C+
Dihydrogen H+2
Phosphonium PH+4
Cyclopropenium C3H+3
Hydronium H3O+
Trifluoromethyl CF+3
Fluoronium H2F+
Pyrylium C5H5O+
Sulfonium H3S+...
