Multicurie amts. of benzene-tx (x = 1, 2) were prepd. by T2O decompn. of 1,4-(BrMg)2C6H4. After purifn., the radio gas chromatog. anal. of the benzene-tx fraction revealed less than 0.1% radioactive impurities (mostly bromobenzene-t). Isotopic anal. by 3H NMR spectroscopy showed that the major component (56 mol%) of the benzene-tx mixt. is benzene-1,4-t2 (overall yield ∼23%), the remainder being mainly benzene-t. An interesting long-range inverse heavy-isotope effect on the 3H NMR chem. shifts of the two radioactive products has been obsd. and its possible cause considered.
Synthesis and 3H NMR analysis of benzene-1,4-t2: a natural source of tritiated phenylium cations / Angelini, Giancarlo; Speranza, Maurizio; Segre, Annalaura; L. J., Altman. - In: JOURNAL OF ORGANIC CHEMISTRY. - ISSN 0022-3263. - STAMPA. - 45:(1980), pp. 3291-3295.
Synthesis and 3H NMR analysis of benzene-1,4-t2: a natural source of tritiated phenylium cations
ANGELINI, Giancarlo;SPERANZA, Maurizio;SEGRE, ANNALAURA;
1980
Abstract
Multicurie amts. of benzene-tx (x = 1, 2) were prepd. by T2O decompn. of 1,4-(BrMg)2C6H4. After purifn., the radio gas chromatog. anal. of the benzene-tx fraction revealed less than 0.1% radioactive impurities (mostly bromobenzene-t). Isotopic anal. by 3H NMR spectroscopy showed that the major component (56 mol%) of the benzene-tx mixt. is benzene-1,4-t2 (overall yield ∼23%), the remainder being mainly benzene-t. An interesting long-range inverse heavy-isotope effect on the 3H NMR chem. shifts of the two radioactive products has been obsd. and its possible cause considered.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
