- (oxygen) atoms. The
general formula of a
polyphosphoric acid is Hn+2PnO3n+1 or HO[−P(O)(OH)−O−]nH.
Polyphosphoric acids are used in
organic synthesis for...
-
pentoxide solution in
methanesulfonic acid) is used as an
alternative to
polyphosphoric acid in
chemical synthesis to
promote acylation reactions. Eaton, P...
- polymorphs,
which melt at 54.3 and 71.5 °C. The
compound is a
component of
polyphosphoric acid, an
important source of
phosphoric acid. Anions, salts, and esters...
- This
reaction can be
catalyzed by Brønsted
acids such as HCl, H2SO4,
polyphosphoric acid and p-toluenesulfonic acid or
Lewis acids such as
boron trifluoride...
- a
mixture of
polyphosphoric acid (PPA) and
various alcohols (Sloop used
ethanol in his experiment). The
mixture produced a
polyphosphoric ester (PPE) catalyst...
- chloride, one must heat the
reaction to 200-270 °C for 24hrs. The use of
polyphosphoric acid will give
acridine products at a
lower temperature, but also with...
-
salts +5 (HPO3)n
metaphosphoric acids n
salts (n = 3,4,6) +5 H(HPO3)nOH
polyphosphoric acids n+2 acids,
salts (n = 1-6) +5 H5P3O10
tripolyphosphoric acid 3...
-
formation of
polyphosphoric acids. It is not
possible to
fully dehydrate phosphoric acid to
phosphorus pentoxide,
instead the
polyphosphoric acid becomes...
-
altered to
occur with a
catalytic amount of base, or in the
presence of
polyphosphoric acid.
Because of the
similarity of
these to the
reagents in the Friedlander...
- to
catalyze the rearrangement.
Other acids, such as
sulfuric acid,
polyphosphoric acid, and
hydrogen fluoride have all been used.
Sulfuric acid is the...
