Phosphonous acids formulae

Octanamine, N,N-dimethyl-, N-oxide. See Octyl dimethylamine oxide Octanaminium, N,N-dimethyl-N-octyl-, chloride 1-Octanaminium, N-octyl-N,N-dimethyl-, chloride. See Dioctyl dimonium chloride 1,2-Octanediol. See Capryl glycol Octane, 1,1 -oxybis-. See Dioctyl ether Octane phosphonic acid Formula RPO(OH)2, R = Cj Properties Cryst. solid... 

All phosphoms oxides are obtained by direct oxidation of phosphoms, but only phosphoms(V) oxide is produced commercially. This is in part because of the stabiUty of phosphoms pentoxide and the tendency for the intermediate oxidation states to undergo disproportionation to mixtures. Besides the oxides mentioned above, other lower oxides of phosphoms can be formed but which are poorly understood. These are commonly termed lower oxides of phosphoms (LOOPs) and are mixtures of usually water-insoluble, yeUow-to-orange, and poorly characteri2ed polymers (58). LOOPs are often formed as a disproportionation by-product in a number of reactions, eg, in combustion of phosphoms with an inadequate air supply, in hydrolysis of a phosphoms trihahde with less than a stoichiometric amount of water, and in various reactions of phosphoms haUdes or phosphonic acid. LOOPs appear to have a backbone of phosphoms atoms having —OH, =0, and —H pendent groups and is often represented by an approximate formula, (P OH). LOOPs may either hydroly2e slowly, be pyrophoric, or pyroly2e rapidly and yield diphosphine-contaminated phosphine. LOOP can also decompose explosively in the presence of moisture and air near 150° C. 

The reason for such a behaviour of arsenic acid is that arsenic is a member of the group 5A elements in the periodic table. Phosphorus and antimony are also group 5 elements and are known to be chemically similar to arsenic. On this basis [8,9], the antimonic acids were found to be poor cassiterite collectors. The alkyl phosphonic acids were not selective collectors. The ethylphenylene phosphonic acid was found to produce similar or better results compared to /7-tolyl arsonic acid. The structural formula for phosphonic acid (Figure 21.5) is similar to that of /7-tolyl arsonic acid but arsenic was replaced with phosphoms. The styrene phosphonic acid radicals are C6H5-CH-CH and p-ethylphenylene CH3-CH2-C6H4. 

Fluorinated phosphinic and phosphonic acid derivatives Perfluoro derivatives of alkyl phosphonic acid CnF2n+1-P(0)(0H)2 and alkyl phosphinic acid CnF2n+i(CmF2m+1)-P(0)0H (n = m or n m) shown with their general structural formulae in Fig. 2.11.29(1) and (II) were examined by negative ESI- and APCI-FIA-MS. These anionic surfactant compounds contained perfluoro alkyl chains [2,22,25]. By analogy with their behaviour in the TSI-FIA-MS(—) process [25], the phosphonic acid formed [M — H] ions at m/z 399 and 499... 

In support of the above formulae for phosphonous acid (XII) ad phosphinic acid (XI) Professor Ingold2 kindly supplied the following note ... 

An objection sometimes raised against the above system was that phosphonous acid contains quinquivalent phosphorus, whereas phos-phimc acid contains tervalent phosphorus, and it was argued that this contravened the usual -ic for the higher valency state and -ous for the tower valency state (cf. ferric Fe + and ferrows Fe2. For this reason the formulae for phosphonous acid and phosphinic acid were interchanged and with these amendments the system continued to be used for a further period in this country. 

CASRN 39148-24-8 molecular formula CeHisAlOgPs FW 354.10 Plant. Felsot and Pedersen (1991) reported that fosetyl-aluminum degrades in plants forming phosphonic acid which ionizes to the dianion phosphonate, HPOs. ... 

Phosphonic acid esters are derived from phosphonic acid (often erroneously called phosphorous acid), which is shown with some of its esters in Figure 18.3 Only two of the H atoms of phosphonic acid are ionizable, and hydrocarbon groups may be substituted for these atoms to give phosphonic acid esters. It is also possible to have esters in which a hydrocarbon moiety is substituted for the H atom that is bonded directly to the phosphorus atom. An example of such a compound is dimethylmethylphosphonate, shown in Figure 18.3. This type of compound has the same elemental formula as triesters of the hypothetical acid P(OH)3, phosphorous acid. Examples of triesters of phosphorous acid, such as trimethylphosphite, are shown in Figure 18.3. 

Chemical Name (cis-l,2-Epoxypropyl)phosphonic acid Common Name Phosphonomycin Structural Formula ... 

Seyferth s diazomethane phosphonic acid dimethyl ester, which enables the aldehyde —> alkyne elongation shown in Figure 14.30, is unstable. This is why Bestmann replaced it by a less sensitive synthetic equivalent, namely diazo acetone phosphonic acid dimethyl ester (Formula C in Figure 14.31), since with potassium methoxide—which is proportionately present in a solution/suspension of solid potassium carbonate in dry methanol—the dia-... 

Equimolar reactions of an aluminum alkyl with a phosphonic acid under room temperature or reflux conditions yields oligomers of the formula [RA103PR ] (n = 4, 6, 10) (equation 28). Tetrameric (n = 4) derivatives (37) are the... 

The reaction between white phosphorus, oxygen and cyclohexene in benzene solution yielded a product with the empirical formula CgHj 0P2O4 which hydrolyzed in the presence of oxygen to cyclohexene-l-phosphonic acid, (28) ... 

I would like to tell you another case in which we proposed the reaction mechanism before we carried out the reaction in the laboratory. Fortunately the result came out as predicted. We were interested in making some organophosphorus compounds containing two phosphonous acid chloride groups as shown in the following formula ... 

A related group of reagents comprises azo dyes containing phosphonic acid groups, for example, the Chlorophosphonazo III (formula 4.11). This reagent is recommended for determinations of Zr, Ti, U, Se, Ca, and Sr, among others [27]. 

Fragmentation of bisazo species of formula Ar1—N=N—C10H6—N=N—Ar2 occurred at both azo linkages, thus yielding valuable structural information. The FAB method has also been applied to sulfonated azo dyes incorporating a phosphonic acid... 

Aminotris (methylphosphonic acid). See Aminotrimethylene phosphonic acid Aminoundecanoic acid. See 11-Aminoundecanoic acid 11-Aminoundecanoic acid CAS 2432-99-7 EINECS/ELINCS 219-417-6 Synonyms Aminoundecanoic acid u>-Aminoundecanoic acid 11-Aminoundecylic acid Undecanoic acid, 11-amino-Empihcal C11H23NO2 Formula H2N(CH2)ioCOOH Properties Wh. cryst. powd. sol. 10-50 mg/ml in 5% acetic acid (16 C) sol. < 1 mg/ml in DMSO, 95% ethanol, methanol, acetone, toluene sol. < 0.1 mg/ml in water m.w. 201.31 m.p. 190-192 C (dec.)... 

Synonyms Bis (2-ethyl-1-hexyl)-2-ethyl-1-hexyl phosphonate Bis (2-ethylhexyl) 2-ethylhexyl phosphonate Di (2-ethylhexyl)-2-ethylhexyl phosphonate Phosphonic acid, (2-ethylhexyl)-, bis (2-ethylhexyl) ester Empirical C24H51O3P Formula CsHijPOCOCsHij) ... 

Hydroxy-2,2,2-trichloroethylphosphonic acid dimethyl ester (2,2,2-Trichloro-1-hydroxyethyl) dimethylphosphonate 2,2,2-Trichloro-1-hydroxyethylphosphonate, dimethyl ester (2,2,2-Thchloro-l-hydroxyethyl) phosphonic acid dimethyl ester Trichlorophon Trichlorphene Trichlorphon Empirical C4H8CI3O4P Formula (CH30)2P(0)CH(OH)CCl3 Properties Wh. cryst. solid sol. in water, alcohols, ketones, benzene, chloroform, ether si. sol. in aromatic soivs., petrol, ether insol. in oils m.w. 257.45 dens. 1.73 (20/4 C) m.p. 83-84 C b.p. 

C H NMR data for some salts of H-phosphonic acid monoalkyl esters with general formula [RO-PHOO] A" ". Chemical shift for the a-carbon atoms of the corresponding dialkyl H-phosphonates are given in parentheses... 

It was found that lV,lV-bis-(2-hydroxyalkyl)-aminomethane phosphonic acid dialkyl esters, corresponding to compounds with formula 3, can be obtained by reacting dialkyl H-phosphonates 1 with oxazolidines 2 in the presence of an acid ion exchanger [71],... 

Internal salts of H-phosphonic acid diesters with the general formula given below possess plant preservative properties against pathogenesis caused by fungicides [12]. 

Alkylammonium salts of monoalkyl H-phosphonic acids having the following general formula are used as plant growth regulators [44,45] ... 

Phosphonic acid dialkyl esters (PAE) are a group of compounds exhibiting biological activity as herbicides, defoliants, insecticides etc. (1). They are relatively large and non-rigid molecules described by a general formula RP(0)(0R ). For most PAE, molecular shape and... 

Proton-Conducting Polymers and Membranes Carrying Phosphonic Acid Groups 129 Table 1 Properties of the polyethers of general formula... 

H3PO3 is more clearly described with the structural formula HP0(0H)2. This species exists in equilibrium with a minor tautomer P(0H)3. IUPAC recommendations, 2005, are that the latter is called phosphorous acid, whereas the dihydroxy form is called phosphonic acid. Only the reduced phosphorus compounds are spelled with an "ous" ending. Other important oxyacids of phosphorus are phosphoric acid (H3PO4) and hypophosphorous acid (H3PO2). The reduced phosphorus acids are subject to similar tautomerism involving shifts of H between O and P. 

Chloroadenallene 45 gave, after refluxing with triethylphosphite for 30 min, g-2 -phosphonate 47 in 30% yield (Scheme 7). A routine dealkylation afforded phosphonic acid 48 (60%). Thus, the usual reaction at the reactive allylic terminal was suppressed in favor of a nucleophilic attack at the sp carbon atom. The mechanism may include an intramolecular dealkylation as indicated in formula 49, although an intermolecular reaction is also possible. 

Synonyms BHMTPMP Bishexamethylenetriamine, pentamethylenepentaphosphonic acid Phosphonic acid, (((phosphonomethyl) imino) bis (6,1-hexanediylni-trilobis (methylene))) tetrakis-Empirical C,7H44N30,5P5 Formula (HO)2POCH2N[(CH2)gN[CH2PO(OH)2y2 Properties M.w. 685.40 Precautien Corrosive... 

---