Ueber Phenylpropiolsäuredijodid und die Jodaddition an ungesättigte Säuren

Abstract

1)Dass diese aus dem Chloracettoluid iihnlioh zusammengesetzten, vielleicht isomeren Substanzen bestehen, ergiebt sich aus den mit nicht ganz reinen Praparaten ausgefchrten Chlorbestimmungen.2) Diese Berichte XXIV, 2588.

Stereochemistry of iodine addition to acetylenes

“…Although both (£)-and (Z)-methyl 2,3-diiodoacrylates (4 and 5, respectively) are known,7•13 only the former (E) is reported to result from the direct addition of iodine to methyl propiolate (3). 13 We have observed, however, the simultaneous formation of both isomers (Tables I and II) when the concentration of iodine is kept low by its slow addition to the acetylene 3.…”

“…<5[(Z)-IHC=CHI (96.5 ppm)] -<5[H2C=CH2 (123.3 ppm)] = -26.8 ppm = Zm.1} (2) 5[(£)-IHC=CHI (79.4 ppm)] -<5[H2C=CH2 (123.3 ppm)] = -43.9 ppm = Zm.l} (3) <5[(Z)-CH302CHC=CHC02CH3 (128. Again applying eq 1, where this time the base value is 123.3 ppm (<5[(H2C=CH2]), and pairing Z^Zy 1 with Z«z)-co2ch3) and Z({Ej.l} with Z((£).co2ch3)> we obtained the values presented in Table IV.…”

The Reactions of Monomeric Styrenes.

“…Hg^ > C6H6CC1=CHC1 y CcHsC^CI + HI ,ß,ß-Triiodostyrene has been obtained by a variety of methods such as the reaction between silver phenylacetylide or ß-iodophenylacetylene with iodine (451), the reaction between phenylacetylene and nitrogen triiodide (155) along with ß-iodo-a-phenylacetylene, from the reaction between silver phenylpropiolate and iodine in benzene solution (777).…”

Untersuchungen zur Methode der Fettbestimmung in thierischem Material

“…Da es sich im gegebenen Falle hauptsachlich um Oelsaure handelt, so konnen wir aus der Jodzahl den Oels~mregehalt tier Fette bestimmen. C. Lieb erm ann(29) hat seiner Zeit die Hubl'sche Methode angegnffen. Er fuhrt u.…”