Ethane phosphonic acid

When the disodium salt of l,2-bis(methoxycarbonyl)ethane phosphonic acid is applied, poly(ethylene terephthalate) with the structure given below was obtained [93,94]. It was found that the polycondensation stage proceeds normally at 1-9% (by weight) of the... 

Phosphonic Acid l-Amtno-2-hydroxy-ethan- E2Ie, 5725 [Nitron + R-CHO/... 

SYNS DEQUEST 2010 DEQUEST 2015 DEQUEST ZOlO EHDP ETHANE-l-HYDROXY-Ll-DIPHO-SPHONATE 1,1,1-ETHANETRIOLDIPHOSPHONATE ETIDRONIC ACID FERROFOS 510 HEDP 1-HYDROX -l,l-DIPHOSPHONOETHANE HYDROXY-ETHANEDIPHOSPHONIC ACID 1-HYDROXY-ETHANEDIPHOSPHONIC ACID OXYETHYL-IDENEDIPHOSPHONIC ACID PHOSPHONIC ACID, 1-HYDROX -l,l-ETHANEDIYL ESTER PHOSPHONIC ACID, (l-HYDROXYETHYLIDENE)BIS- lOOOSL TURPINAL SL... 

In the group of phosphonic acid derivatives, 0,0-dimethyl-(l-hydroxy-2,2,2-trichloro)ethane phosphonate, known under the name trichlorfon (Dipterex , 68), occupies a special place both chemically and biologically. It is prepared by the addition of dimethyl phosphonate to chloral (Barthel et al., 1954 Lorenz, 1953a). 

Diethylenelriaminepenta(methylenephosphonic)acid. Diethylenetriamine, pentamethylenepentaphosphonic Diethylerietriaminepenta(methylenephosphoriic) acid EINECS 239-931-4 Phosphonic acid, (((phosphono-methyl)imino)bis(2,1-ethanediylnitrilobis-(methylene)))tetrakis- (((Phosphonomethyl)imino)bis-(ethane-2,1-diylnitrilobis(methylene)))tetrakisphosphonic acid. 

The addition of a nitroalkane to an alkenylphosphonic diester is exemplified by the interaction of nitromethane with diethyl ethenylphosphonate in the presence of NaOEt, when the product is diethyl (3-nitropropyl)phosphonate and by a similar addition to 1,1-bis(diethoxyphosphinoyl)ethane . In the initial stages of a synthesis of (4,5,6-trihydroxy-3-oxohexyl)phosphonic acid, the nitro sugar 76 was made to add to dibenzyl ethenylphosphonate, but the resultant (3-nitropropyl)phosphonic dibenzyl ester 77 was then used without isolation. ... 

The photochemical cleavage of the phosphorus-carbon bond in many benzylic phosphonic acids occurs through intramolecular electron transfer and gives monomeric metaphosphate together with substituted toluenes and, in many cases, 1,2-diarylethanes. The ultraviolet irradiation of (4-nitrobenzyl)phosphonic acid dianion in solution in aqueous ethanol yields l,2-bis(4-nitrophenyl)ethane, 4-nitrotoluene, H3PO4 and monoethyl phosphate (Scheme Irradiation of the same acid in the presence of dbu (other tertiary... 

Fig. 4 Frequency of detection for selected pesticides (red bars) and their transformation products (blue bars) from 86 municipal wells sampled in Iowa during 2001 [48]. ESA -ethane sulfonic acid OXA - oxanUic acid AMPA - aminomethyl phosphonic acid...

CAS 3794-83-0 EINECS/ELINCS 223-267-7 Synonyms Ethane-1-hydroxy-1,1-diphosphonic acid, tetrasodium salt (1-Flydroxyethylidene) bisphosphonic acid, tetrasodium salt (1-Fly-droxyethylidene) diphosphonic acid, tetrasodium salt 1-Flydroxyeth-ylidene-1,1 -diphosphonic acid, tetrasodium salt NaiFIEDP Phosphonic acid, (1-hydroxyethylidene) bis-, tetrasodium salt Tetrasodium 1-hydroxyethane-1,1 -diphosphonate Tetrasodium (1 -hydroxyethylidene) bisphosphonate Tetrasodium 1 -hydroxyethylidene-1,1 -diphosphonate Classification Diphosphonic acid deriv. 

Ethane-1 -hydroxy-1 -1 di phosphonic acid disodium salt. See. Disodium etidronate Ethane-1 -hydroxy-1,1 -diphosphonic acid, tetrasodium salt. See Tetrasodium etidronate Ethane, 1,1 -[methylenebis (oxy)] bis-. See Diethoxymethane... 

Phosphonomethyl) imino] bis [ethane-2,1-diylnitrilobis (methylene)] tetrakisphosphonic acid. See Diethylene triamine pentamethylene phosphonic acid... 

This implies that these compounds have P-H type acidity and are therefore considerably less acidic than the corresponding P-OH type acids. It was established by means of P NMR spectroscopy that in dimethoxy ethane, the acidity of dibutyl hydrogen phosphonate is close to that of ethanol, and that these P-H acids are stronger than the corresponding N-H acids [3]. The pK values of a series of H-phosphonate diesters have been calculated by the so-called premetallization method [4], according to the following equation ... 

Trisodium l-phosphono-2-phosphino ethane is used as an end-capper. This compound is also addressed as a telomeric adduct from vinyl phosphonic acid and sodium hypophosphite (12). 

A -Phosphinoyl and A -thiophosphinoyl ketimines, Ph-C(Me)=N-P(=X)Ph2 (X = O and S), have been hydrophosphonylated in high yield and ee using a copper(I) catalyst liganded with a chiral diphosphino ethane. In the case of the sulfur substrates, facile differentiated removal of the t/imphosphinoyl group affords a-amino phosphonic acid derivatives, Ph- C(Me)(NH2)-P(=0)(0Et)2, that is, phosphonic acid analogues of enantio-enriched a,a-disubstituted a-amino acids. The reaction also accommodates alkyl, cycloalkyl and alkenyl substituents in place of the phenyl. 

The mechanism of adsorption of a corrosion inhibitor, 1-hydroxy-ethane-1,1-di-phosphonic acid (HEDP), on polycrystalline iron has been studied in neutral solutions. The chemical interactions between inhibitor molecules and different metallic or oxidized surfaces under near-neutral aqueous circumstances were investigated by XPS and XAES surface analytical methods (Felhosi et al., 1999a Karmdn et al., 1998). For quantitative correlation between the components of the oxide layer and the corrosion resistance of the passive film, it is important to determine the ratio of oxygen in different states in the passive layer. 

Tri (2-hydroxyethyl)amine. See Triethanolamine Trihydroxyethylamine oleate. See TEA-oleate Trihydroxyethylamine stearate. See TEA-stearate 2-[[(3a,5P,7a,12a)-3,7,12-Trihydroxy-24-oxocholan-24-yl]amino] ethane-sulfonic acid sodium salt. See Sodium taurocholate Trihydroxyphosphine. See Phosphonic acid... 

The reactions of dimethyl methylphosphonate and the corresponding carbanion in the gas phase have been investigated. The carbanion displays a similar range of reactions to those encountered in solution, including olefmation with carbonyl compounds. The effect on olefin stereochemistry of a variety of conditions in reactions of a-phosphono lactones (e.g. 129) with ethanal and propanal has been studied and the results applied in syntheses of integerrinecic acid and senecic acid lactones. Yet further minor modifications of the conditions for phosphonate-olefination reactions, involving the use of lithium hydroxide as the base, have been reported. ... 

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