Zobrazeno 1 - 9
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pro vyhledávání: '"Jean‐Pierre Leber"'
Autor:
Jean‐Pierre Leber, Emile Cherbuliez
Publikováno v:
Helvetica Chimica Acta. 35:644-664
1. The mechanisms postulated for the direct esterification of carboxylic acids involve the coordinative non-saturation of the carboxylic carbon; these mechanisms do not apply to the esterification of orthophosphoric acid.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aba863b05f20e855681e79408221e297
https://doi.org/10.1002/hlca.19520350233
https://doi.org/10.1002/hlca.19520350233
Publikováno v:
Helvetica Chimica Acta. 36:537-547
The calcium ion is acting as a very active catalyst in the alcaline hydrolysis of pyrophosphoric acid, poly- and metaphosphoric acids, of ethylphosphate, ethyl pyrophosphate (splitting of the POP bond) as well as in the alcoholysis of the latter. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d9bd54c19dc9ee1522972bb15780187
https://doi.org/10.1002/hlca.19530360223
https://doi.org/10.1002/hlca.19530360223
Autor:
Jean‐Pierre Leber, Emile Cherbuliez
Publikováno v:
Helvetica Chimica Acta. 33:2264-2267
L'acide orthophosphorique possede a 130° une tension de vapeur de l'ordre de quelques milliemes de millimetre, ce qui explique sa volatilite perceptible a cette temperature.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c712b70537fa9849eb49709758de67c
https://doi.org/10.1002/hlca.19500330739
https://doi.org/10.1002/hlca.19500330739
Publikováno v:
Helvetica Chimica Acta. 36:910-918
Orthoboric esters have a particular behaviour. Submitted to acidolysis, they easily yield free alcohol and the corresponding mixed boric anhydride. On the other hand, they undergo halolysis only with great difficulty, as compared to phosphoric esters
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d3e5ea5123ee011d062bd8fc598c936
https://doi.org/10.1002/hlca.19530360424
https://doi.org/10.1002/hlca.19530360424
Publikováno v:
Helvetica Chimica Acta. 36:1189-1199
The reaction of phosphoric anhydride with H3PO4, Et3PO4 and alcohols proceeds by stages, the P-O-P- functions becoming less reactive with the diminution of the number of -O-P groups fixed on each P. These reactions are considered to proceed by primar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50d2cb2dccf9e6e267c67157f10a8113
https://doi.org/10.1002/hlca.19530360535
https://doi.org/10.1002/hlca.19530360535
Autor:
Jean‐Pierre Leber, Emile Cherbuliez
Publikováno v:
Helvetica Chimica Acta. 35:2589-2607
From the study of the hydrolytic splitting of phosphoric esters the authors conclude that the saponification of an ester containing a hemipolar oxygen atom, and in which the acyl function is saturated in coordinative valency, proceeds by the interven
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70e83882e5916b4ea52b84322c9a6c3f
https://doi.org/10.1002/hlca.19520350746
https://doi.org/10.1002/hlca.19520350746
Publikováno v:
Helvetica Chimica Acta. 36:1203-1207
The halides of Zn, FeIII, Ca and Li range in this order in their decreasing efficacity as halolysing agents of triethylphosphate; zinc chloride produces the total splitting of the 3 ester functions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca18ffdb0fbc90fb5bddc72cacf8fdd5
https://doi.org/10.1002/hlca.19530360537
https://doi.org/10.1002/hlca.19530360537
Autor:
Jean‐Pierre Leber
Publikováno v:
Helvetica Chimica Acta. 49:607-616
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0aadecb285f7d3247d22fb8e7f3e663a
https://doi.org/10.1002/hlca.660490171
https://doi.org/10.1002/hlca.660490171
Publikováno v:
Helvetica Chimica Acta. 34:841-843
Chauffe avec de la pyrocatechine, l'acide orthophosphorique aussi bien que l'anhydride phosphorique fournissent l'acide o-phenylene-cyclophosphorique qui, a des temperatures de 200–300°, n'a guere tendance a se deshydrater en ester pyrophosphoriqu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4edfb1c17352f17e99874cc9fcdf4de0
https://doi.org/10.1002/hlca.19510340312
https://doi.org/10.1002/hlca.19510340312