Ethyl metaphosphate ester

Esters of metaphosphoric acid are known. Ethyl metaphosphate, C2HsP03, was prepared by heating dry ethyl acetate with phosphoric oxide and extracting the product with ether and warm alcohol, from which the ester was precipitated by ether.4... 

Material initially prepared by Langheld and usually called ethyl metaphosphate was regarded by Ratz and Thilo as a mixture of the cyclic esters (2) and (3). A later study by Calvin el a . using NMR data indicated the probable presence of an additional cyclic ester and an open-chain ester. 

Phosphoric acid esters Ethyl metaphosphate Poly phosphoric acid esters... 

Phosphoric acid esters Ethyl metaphosphate Phosphate buffer Quinoline phosphate Dichloro phosphites, CH OPCh Triethyl phosphate. Butyl phosphate Phenyl acid phosphate Diphenyl hydrogen phosphate Di-p-nitrophenyl hydrogen phosphate (RO)gPS... 

Monomeric metaphosphate ion will also activate the carbonyl group of esters (10). In particular, it promotes the reaction of ethyl acetate with aniline to yield O-ethyl-N-phenylacetimidate. The reaction is complete within seconds, whereas, in the absence of monomeric metaphosphate, the reaction between ethyl acetate and aniline is slow, and yields acetanilide. 

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