Knowledge Bank

The ultraviolet spectrum of pyrazino (2,-3-b) pyrazine shows a $\pi^{*}\leftarrow $ n transition at 412 ma and a $\pi \ast \leftarrow \pi$ transition originating at about 3200 \AA. The vapor spectrum reveals an apparent origin at $31017cm-1$. Details of the vibronic structure will be discussed. Present address of John Youker: Hudson Valley Community College, Troy, New York, 12180.