Mass Spectrometric Identification of Some bis-2, 4-Dinitrophenylhydrazones

Authors: Stanley, James B.1; Senn, Vincent J.1; Brown, David F.2; Dollear, F. G.1

Source: Applied Spectroscopy, Volume 27, Issue 2, Pages 85-142 (March/April 1973) , pp. 141-141(1)

Publisher: Society for Applied Spectroscopy

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Abstract:

Nitrophenylhydrazones, notably 2,4-dinitrophenyl-hydrazones (2,4-DNPH), are among the most widely used derivatives for mass spectral characterization of carbonyl compounds. Mono-2,4-DNPH's of n-aldehydes of C5 or more and n-ketones of C6 or more exhibit prominent fragmentation peaks: the aldehydes giving strong peaks at masses 224 and 206, methyl ketones at masses 238 and 178, and ethyl ketones at masses 252 and 178. All show a distinct peak at M-35. Mass 182 is reported to be significant for mono-2, 4-DNPH using the time-of-flight mass spectrometer. Spectra of two steroid mono-2, 4-DNPH's run in this laboratory showed M-35 as the only characteristic peak shared with the straight chain series and not the characteristic bis-2, 4-DNPH peaks.

Keywords: Carbonyls; Mass spectral data; bis-2,4-Dinitrophenyl-hydrazones

Document Type: Short Communication

DOI: http://dx.doi.org/10.1366/000370273774333759

Affiliations: 1: Southern Regional Research Laboratory, Agricultural Research Service, United States Department of Agriculture, New Orleans, Louisiana 70179 2: Southern Regional Research Laboratory, Agricultural Research Service, United States Department of Agriculture, New Orleans, Louisiana 70179; present address: Protein Chemistry Laboratory, Agronomy Field Laboratory, Soil & Crop Sciences Department, Texas A&M University, College Station, Texas 77843

Publication date: March 1, 1973

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