Mass, and Other Spectra of Pyrazines

6-dimethylpyrazines and 2-methoxy-3(5 or 6)-methylpyrazine (686), and for pyrazine absorbed on silica (1513). Raman spectra of pyrazine on a series of alkali and alkali earth cation exchange X-type zeolites have been recorded (1514). Electron spin resonance studies have been made of pyrazine anion radical (583, 596, 752, 1515) pyrazine 1-oxide and 1,4-dioxide anion radicals (750a, 751), the cation radical of pyrazine 1,4-dioxide (753), cation and anion radicals of pyrazine 1-oxide and 1,4-dioxide (750b), the anion radicals of 2,3-dimethylpyrazine and 2,5-di-f-butyl-3-isopropylpyrazine (596a), and diprotopyrazine cation radical (1516). 

Phosphorescence (1477,1492,1517) and fluorescence (1518) spectra of pyrazine have been studied. Magnetic circular dichroism (1519) and induced circular dichioism (1520) of pyrazine have been measured. The photoelectron spectra of pyrazine, 2,6-dimethylpyrazine, and tetramethylpyrazine have been compared 

Photoelimination reactions of 2-butylpyrazine and 2- -hydroxyethylpyrazine to give 2-methylpyrazine have been examined (722). 

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