13C and 15N NMR studies of 2,3,4-pentanetrione 3-phenylhydrazone, dimethyl 2-phenylhydrazonopropanedioate and ethyl 2-phenylhydrazono-3-oxobutanoate
1980 ◽
Vol 45
(12)
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pp. 3354-3359
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Keyword(s):
15N Nmr
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The 13C AND 15N NMR spectra of 2,3,4-pentanetrione 3-phenylhydrazone, dimethyl 2-phenylhydrazonopropanedioate and ethyl 2-phenylhydrazono-3-oxobutanoate have been measured in deuteriochloroform at 30 °C. The carbon and nitrogen signals have been assigned, and the chemical shifts and coupling constants 1J(CH) have been determined. Ethyl 2-phenylhydrazono-3-oxobutanoate has been measured first as the (E) isomer and then as a mixture of the (E) and (Z) isomers. This compound has also been prepared with one or two 15N atoms enabling determination of absolute values of the coupling constants nJ(15N13C) and 1J(15N15N), respectively.
1977 ◽
Vol 32
(3)
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pp. 257-264
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1988 ◽
Vol 26
(5)
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pp. 435-438
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Keyword(s):