Synthesis and Characterization of a Series of 1-Aryl-4-[Aryldiazenyl]-piperazines. Part II1. 1-Aryl-4-(2-Aryl-1-Diazenyl)-piperazines with Fluoro-, chloro-, Methyl-, Cyano- and Acetyl Substituents in The 1-Aryl Group

Table 16: Mass spectroscopic data of the 1-(2-cyanophenyl)-4-(2-aryl-1-diazenyl)-piperazine series (19).

Cpd	KS	Formula	Calc. mass (amu)	Found mass (amu)
19a	KS72	C₁₉H₁₉N₅O₂	349.1538	349.1534
19b	KS75	C₁₈H₁₉N₅	305.1640	305.1640
19c	KS74	C₁₇H₁₆N₅Br	369.0589	369.0585
19d	KS76	C₁₈H₁₉N₅O	321.1589	321.1580