A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 870-50-8, Name is Di-tert-butyl diazene-1,2-dicarboxylate, molecular formula is C10H18N2O4. In an article, author is Friedman, P,once mentioned of 870-50-8, Quality Control of Di-tert-butyl diazene-1,2-dicarboxylate.
A theoretical study of the aromaticity of hypervalent sulfur heterocycles
In this paper we report on the heteroaromaticity of 1,2,5-thiadiazole-1,l-dioxide (I) and its isomers 1,2,4-thiadiazole-1,1-dioxide (II), 1,3,4-thiadiazole-1,I-dioxide (III) and 1,2,3-thiadiazoIe-1,1-dioxide (IV) by calculating their electronic structures and estimating their aromatic character in terms of our previously developed criteria: N, MDQ, Delta E-pi L(NLMO) and Delta E-pi L(Boys) as well as comparing their total energies. (I) is shown to be the most aromatic isomer in good agreement with chemical reasoning and experimental evidence. The 1,l-dioxides of thiazole and isothiazole were predicted to be intermediate in aromaticity between thiophene-l, 1-dioxide and the isomers, (I)-(N). N value measures indicate that thiophene-l,1-dioxide would retain a small measure of aromatic character relative to thiophene (N(thiophene) = 0.868, N(thiophene-l,l-dioxide) = 0.389). (C) 1997 Elsevier Science B.V.
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Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com