Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
Phosphorous acid (or phosphonic acid) is the compound described by the formula H3PO3. This acid is diprotic (readily ionizes two protons), not triprotic as might be suggested by this formula. Phosphorous acid is an intermediate in the preparation of other phosphorus compounds. Organic derivatives of phosphorous acid, compounds with the formula RPO3H2, are called phosphonic acids.
Phosphorousacid (or phosphonic acid) is the compound described by the formula H3PO3. This acid is diprotic (readily ionizes two protons), not triprotic...
phosphorousacid, phosphorous anhydride) A common misspelling of the element name phosphorus Phosphorus All pages with titles containing Phosphorous Phosphorus...
Anhydrous acid cannot be obtained by simple evaporation of the water, as the acid readily oxidises to phosphorousacid and phosphoric acid and also disproportionates...
phosphorousacid/phosphoric acid mixed anhydride. The two phosphorus atoms are in the +3 and +5 oxidation states, respectively. Hypophosphoric acid can...
commercially important, and three of them, hypophosphorous acid, phosphorousacid, and phosphoric acid, are particularly important. The PN molecule is considered...
Typical examples of weak acids include acetic acid and phosphorousacid. An acid such as oxalic acid ( HOOC − COOH {\displaystyle {\ce {HOOC-COOH}}} ) is...
adamantane. It is formally the anhydride of phosphorousacid, H3PO3, but cannot be obtained by the dehydration of the acid. A white solid that melts at room temperature...
myclobutanil propiconazole dimethomorph polyoxins acibenzolar fosetyl-Al phosphorousacid Some of the most common fungal crop pathogens are known to suffer from...
point group. It is closely related to the corresponding anhydride of phosphorousacid, P4O6. The latter lacks terminal oxo groups. Its density is 2.30 g/cm3...
are reducing in character. The IUPAC recommended name for phosphorousacid is phosphonic acid. Correspondingly, the IUPAC-recommended name for the HPO2−...
often prepared from) phosphorousacid. Phosphonate salts are the result of deprotonation of phosphonic acids, which are diprotic acids: RPO(OH)2 + NaOH →...
arsenous acid solutions consists of a single signal consistent with the molecule's high symmetry. In contrast, the nominally related phosphorousacid H3PO3...
synthesized from the Mannich-type reaction of ammonia, formaldehyde, and phosphorousacid, in a manner similar to the Kabachnik–Fields reaction. ATMP has good...
(POCl3). PCl3 reacts vigorously with water to form phosphorousacid (H3PO3) and hydrochloric acid: PCl3 + 3 H2O → H3PO3 + 3 HCl Phosphorus trichloride...
organyl isothiocyanates are not classified as esters by the IUPAC Phosphorousacid forms two types of esters: phosphite esters, e.g. triethyl phosphite...
Phosphoric acid (orthophosphoric acid, monophosphoric acid or phosphoric(V) acid) is a colorless, odorless phosphorus-containing solid, and inorganic...
atom. This rule can help assign molecular structure: for example, phosphorousacid, having molecular formula H3PO3, has a pKa near 2, which suggested...
P(OR)3. They can be considered as esters of an unobserved tautomer phosphorousacid, H3PO3, with the simplest example being trimethylphosphite, P(OCH3)3...
phosphonate form, (C2H5O)2P(O)H, a property it shares with its parent acidphosphorousacid. Nonetheless many of its reactions appear to proceed via the minor...
in a tertiary amine, or by reaction of an acetic acid/acetic anhydride mixture with phosphorousacid. Fischer J, Ganellin CR (2006). Analogue-based Drug...
Orthocarbonic acid, carbon hydroxide, methanetetrol is the name given to a hypothetical compound with the chemical formula H4CO4 or C(OH)4. Its molecular...
the elements in lower oxidation states are complicated. For example, phosphorousacid H3PO3 predominantly has the structure OP(H)(OH)2, in equilibrium with...
Biochemistry 31: 991-997 Backgrounder: Glyphosate does not degrade to phosphorousacid in the environment. Monsanto. 2005 Pesticide Residues in Food - 1997...
Trimethyl phosphite is an organophosphorus compound with the formula P(OCH3)3, often abbreviated P(OMe)3. It is a colorless liquid with a highly pungent...
and alcohols. PBr3 + 3 H2O → H3PO3 + 3 HBr In reactions that produce phosphorousacid as a by-product, when working up by distillation be aware that this...
hypophosphites or phosphinates. Phosphorousacid (or phosphonic acid), H 3PO 3 (or HPO(OH) 2), a diprotic acid (with only two acidic hydrogens). Its salts and...
consist of salts of the phosphite anion H2PO3−, the conjugate base of phosphorousacid. Phosphites of potassium are used as fungicides (in a loose sense)...
pentahydrate. A derivative of phosphorousacid (HP(O)(OH)2), it contains the anion HPO32−. Its common name suggests that it contains an acidic hydrogen atom, as in...
dioxide is the anhydride of silicic acid: H4SiO4 → 2 H2O + SiO2 Phosphorus(III) oxide reacts to form phosphorousacid in water: P4O6 + 6 H2O → 4 H3PO3 Phosphorus(V)...
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