Hypophosphoric acid tseem hu ua hypophosphite. H3po2=65.99, tsis muaj xim, tsis muaj ntxhiab oily kua, los yog deliquescent crystal, yooj yim nqus dej noo. Nws cov ntsiab lus melting yog 26.5 degree, nws qhov ceev yog 1.493, thiab nws yog decomposed rau hauv phosphoric acid thiab phosphine thaum rhuab mus rau 130 degree. Kub kub sulfuric acid oxidation ua sulfur dioxide thiab sulfur. Nws yog acidic thiab yaj hauv ether. Kev sib raug zoo ntawm cov dej txheeb ze thiab qhov concentration yog: qhov concentration yog 50 feem pua, 30 feem pua ~ 32 feem pua, thiab cov txheeb ze ntom ntom yog 1.274.1.13 thiab 1.04.
Hypophosphorylation tuaj yeem txo qhov hnyav hlau ntsev tov rau hlau.
X-ray txoj kev tshawb fawb tau lees paub tias hypophosphoric acid (h2po-2) yog tetrahedron, thiab muaj ob hom hydrogen txuas ncaj qha nrog phosphorus. Cov qauv yog raws li nram no:
Hypophosphoric acid configuration
Cov molecule no muaj peb hydrogen atoms, tab sis tsuas yog ib pawg hydroxyl, yog li tsuas muaj monobasic acid. Hypophosphoric acid nyob rau hauv aqueous tov yog nruab nrab muaj zog acid, Ka=10-2 (25 degree). Nyob rau hauv qhov kub thiab txias, nws yog rhuab mus rau 130 degree rau decomposition, thiab cov nram qab no disproportionation tshua tshwm sim:
Secondary phosphorus deposition cov tshuaj tiv thaiv.
Cov khoom muaj xws li oxidation cov khoom xws li Biphosphine thiab phosphite. Hypophosphoric acid yaj yooj yim hauv dej thiab ethanol. Cov tshuaj dilute ntawm qhov kub ib txwm tsis hnov mob nrog oxygen hauv huab cua thiab decomposes hauv alkaline nruab nrab ntawm 100 degree:
H2PO-2 plus OH-→HPO-3 plus H2.
Cov khoom lag luam yog cov muaj zog txo tus neeg sawv cev thiab tsis muaj zog oxidant, uas tuaj yeem txo Cu2 ntxiv, Hg2 ntxiv, Ag ntxiv, xws li 4ag ntxiv rau h3po2 ntxiv rau 2H2O=4ag ↓ ntxiv rau H3PO4 ntxiv rau 4H ntxiv.
Lub zog txo tus neeg sawv cev nws tus kheej yog txo rau phosphine phosphine. Feem ntau siv cov tshuaj reagents hauv kev lag luam tshuaj muaj xws li arsenic, zirconium, sib cais tantalum, niobium, thiab lwm yam. Barium hypophosphite yog tsim los ntawm cov tshuaj tiv thaiv dawb phosphorus nrog kub concentrated barium hydroxide. Barium hypophosphite yog tsim los ntawm kev ntxiv sulfuric acid thiab Ba2 ntxiv los nag.
(H2PO2)2 plus H2SO4=BaSO4↓ plus 2H3PO2.
Hypophosphoric acid yog tau los ntawm lub tshuab nqus tsev evaporation thiab qis kub crystallization.
Txoj kev npaj
Barium ntsev BA (H2PO2) 2.2h2o yog tau los ntawm cua sov barium hydroxide tov, thiab ces muab rho tawm nrog dilute sulfuric acid, concentrated thiab txias.
Barium hypophosphite tov yog ntxiv rau dilute sulfuric acid extract los yog npaj los ntawm reacting nrog calcium hypophosphite (barium hypophosphite) thiab sib npaug sulfuric acid.
Barium hypophosphite BA (H2PO2) 2 tau kho nrog sulfuric acid Thaum sodium hypophosphite tov yog kho nrog H2O los yog acid ion txauv resin, tsis muaj xim hypophosphite tov tau, thiab flake crystals tau tom qab concentration.
lub hom phiaj
Hypophosphoric acid yog siv los ua arsenic, zirconium, sib cais ntawm tantalum thiab niobium, thiab muaj zog txo tus neeg sawv cev yog siv hauv kev lag luam kws tshuaj. Hypophosphoric acid yog ib qho muaj zog heev txo monobasic acid nrog ionization tas li k=8 × 10-2. Thaum npaj hypophosphite, feem ntau siv tshuaj xws li sodium ntsev, manganese ntsev, hlau ntsev, thiab lwm yam.
thov
Nruab nrab phosphoric acid tuaj yeem txo cov ntxhiab diazonium ntsev Ar-N2 ntxiv rau Ar-H ntawm aromatic hydrocarbons. Aromatic nitration tuaj yeem nqa tawm nitro txo thiab diazotization tib lub sijhawm. Ua ntej, ib pawg amino yog nkag mus rau hauv lub nplhaib uas muaj ntxhiab, thiab tom qab ntawd ib pab pawg tau nkag mus rau hauv ib qho chaw hauv lub nplhaib uas muaj ntxhiab los ntawm kev ua haujlwm ntawm cov amino pawg. Diazo tshem tawm cov amino pawg.
Hydrated sodium phosphate tuaj yeem siv los ua tus neeg saib xyuas kev lag luam, tshwj xeeb tshaj yog rau electroless npib tsib xee plating ntawm hlau, tsis yog hlau thiab yas. Cov nickel nto feem ntau yog amorphous lossis hlau npib tsib xee uas muaj li ntawm 10 feem pua phosphorus. Ni3P tuaj yeem txhim kho hardness ntawm txheej los ntawm cua sov. Ntxiv nrog rau hypophosphite, cov tshuaj plating kuj muaj cov nickel chloride (los yog npib tsib xee sulfate), lactic acid (tus neeg saib xyuas kev sib koom tes), malate los yog succinate (ua kom ceev deposition) thiab txhuas ntsev (stabilizer).
Iodine raug txo rau hydroiodic acid los ntawm hypophosphoric acid, thiab tom qab ntawd ob ephedrines raug txo rau methamphetamine los ntawm hydroiodic acid. Yog li ntawd, lub koom haum tub ceev xwm tshuaj ntawm US Department of Justice teev no phosphoric acid / phosphate raws li ib tug precursor tshuaj thiab nruj me ntsis tswj nws kev yuav thiab siv. Cov tshuaj precursor tsis suav nrog hauv hypophosphite thiab hypophosphite nyob rau hauv Suav teb loj kev faib thiab catalogues, tab sis ephedrine, ephedrine, ephedrine, ephedrine, ephedrine, thiab lwm yam. Cov tshuaj no yog nyob rau hauv thawj qeb ntawm cov tshuaj precursor thiab yog nruj me ntsis tswj.
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