Diazomethane isotopically labeled

Isotopically labelled i5N2 could be incorporated in partially decomposed diazomethane using solid or gaseous The detailed route to carbenes... 

The IR spectrum of diazomethane is characterized by the strong NN stretching band (2102 cm in the gas phase, 2075 cm in the solid state, 2096 cm Mn Ar or N2 matrices, Moore and Pimentel, 1964 a, 1964 b and references cited therein). Moore and Pimentel s two papers are still, in spite of their age, an excellent account of the IR spectrum of diazomethane. They also include measurements and discussions of the three isotopically-labeled diazomethanes CHDN2, CD2N2, and CH2 N " N. Fadini et al. (1978) measured the CN and NN stretching bands of the three isotopic diazomethanes CH2 " N2, CH2 " N N, and CH2 N " N. They were found at the following wavenumbers CN 1136, 1112, and 1170 cm NN 2097, 2075, and 2073 cm respectively. 

An 0-18 isotopic shift on P-31 chemical shifts of epimeric 1, 3,2-dioxaphosphorinane esters (10) has been used to investigate the stereochemistry of hydroxide catalyzed hydrolysis in these aryl phosphorinane triesters. As shown in Scheme I the axial epimer of 2-(2,4-dinitrophenoxy)-2-oxo-trans-5,6-tetramethylene-l,3,2-dioxa-phosphorinane) 5a, was hydrolyzed in 0-18 enriched hydroxide. The cyclic diester, 8, was methylated with diazomethane in methanol. The P-31 NMR spectrum of the 0-18 labeled axial methyl phosporl-nane product, 2, showed three signals representing the unlabeled... 

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