Monoethyl H-phosphonate

Diethyl H-phosphonate is oxidized by permanganate to the corresponding phosphates [74]. The process is pH-dependent and becomes more rapid at higher pH. Monoethyl H-phosphonate is also formed as a product of the subsequent oxidation of the initially obtained diethyl phosphate. 

Quaternary alkylammonium salts of the monoethyl H-phosphonic add, having at least one methyl group connected to the nitrogen atom undergo, the following type of rearrangement [284] ... 

The NMR chemical shifts are very sensitive with respect to changes in the electron density at a given carbon atom and provide useful information about differences in the structures of the salts I and II. Thus, the signal of the ot-carbon atom in the sodium salt of monoethyl H-phosphonate (type I) is shifted 2.3 ppm downfield (Table 3.5) with respect to the same signal in diethyl H-phosphonate, which indicates a deaease in its electron density. In contrast, the signal of the ot-carbon atom in the triethyl methylammonium salt of monomethyl H-phosphonate (type n) is shifted 2.1 ppm upfield with respect to dimethyl H-phosphonate as a result of an increased electron density, due to the negative charge delocalization. 

H NMR data for some metal salts of monoethyl H-phosphonate with a common formula [C2H50P(0)H0] M ... 

Anunonium or metal salts of monoethyl ester of H-phosphonic acid react with acrylonitrile to furnish the same product [147]. 

The calcium salt of the monoethyl ester of H-phosphonic acid was used a modifier of poly(ethylene terephthalate) [98], A resin modified with 0.4% P and 0.25% Ca has Ti ei =... 

As the first reported " example of intramolecular catalysis of hydrolysis of a phosphonic diester, the ortho isomer of558 (R = Et) hydrolyses almost 10 times faster than the para isomer (which, together with the meta isomer, behaves in no unusual way), presumably by intramolecular acid catalysis, to give the monoethyl ester of ortho-SSS (R = Moreover, the sodium salt of ortho-SSS (R = Et) is moderately stable under aqueous conditions, but undergoes immediate hydrolysis to ortho-SSH (R = H) when acidified ... 

Calcium bis [monoethyl (3,S-di-t-butyl-4-h drot benzyl) phosphonate]... 

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