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Displaying 2001 - 2025 of 2094
Anzor I. Mikaia, Gregory Romanov, Vladimir G. Zaikin, Valentin Vdovin
All major fragmentation mechanisms of cyclobutene hydrocarbons are determined by the analysis of their electron ionization mass spectra and spectra of their selectively deuterated analogs.
Anzor I. Mikaia, Vladimir Smetanin, Vladimir G. Zaikin
A GC-MS method for reliable structure elucidation of olefins is developed. The method includes application of hydrogen as a carrier and reagent gas, the spectra of hydrogenation products provide information on the structure of carbon skeleton.
Anzor I. Mikaia, Vladimir Smetanin, Vladimir G. Zaikin, Valentin Vdovin
A GC-MS method is developed for the determination of double bond location in alkenes based on comparative analysis of the mass spectra of corresponding alkanes and their vicinal Dideutero-analogs obtained via online hydrogenation and selective deuteration
The abilities and limitations of mass spectrometry method in structure determination of bioorganic molecules containing three- and four-membered rings is discussed. Implementation of chemicals is considered.
Anzor I. Mikaia, Alla V. Antonova, Vladimir G. Zaikin, Nikolay A. Prostakov, Nikolay Vulfson, Igor Torgov
A GC-MS method is developed for structure determination of steroid alcohols. The method includes dehydrogenation of steroid alcohols on a copper powder at 325 oC.
Anzor I. Mikaia, Vladimir G. Zaikin, Alla V. Antonova, Nikolay A. Prostakov
On line H/D exchange is applied to carbonyl compounds prior mass spectrometry analysis on a GC column containing 10% KOD. This exchange reaction can be used for other compounds undergoing keto-enol tautomerism.
Anzor I. Mikaia, Elena Trusova, Vladimir G. Zaikin, Naum Volinsky, Elena Karaulova, Gregory Galpern
A GC-MS method is developed for structure determination of thiacyclanes. It is based on online gas- phase hydro- and deutero-desulfurization on Raney nickel after GC separation and before MS analysis.