45,000 



WAVENUMBERS , CM 

 40,000 35,000 



-I 



30,000 26,000 



U) 



o 



WAVELENGTH, A 



Fig. 14. Near ultraviolet absorption curves of pyridazine at room temperature, 

 after Halverson and Hirt (12). Curve a, in cyclohexane; curve b, in water. 



2222 



WAVENUMBERS, CM* 

 40,000 35,000 



30,000 



3500 



2500 3000 



WAVELENGTH, A 



lig. 15. Near ultraviolet absorption curves of pyrazine at room temperature, after 

 Halverson and Hirt (12). Curve a. in cyclohexane; curve b, in water. 



