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 11: Summary of mass spectroscopic data of the 1-(ortho-tolyl)-4-(2-aryl-1-diazenyl)-piperazine series (16).

Series #	X	Formula	Calc. Mass (amu)	Found Mass (amu)
16a	p-NO₂	C₁₇H₁₉N₅O₂	325.1538	325.1548
16b	p-Cl	C₁₇H₁₉N₄Cl	314.1298	314.1298
16c	p-CO₂C₂H₅	C₂₀H₂₄N₄O₂	352.1899	352.1881
16d	p-COCH₃	C₁₉H₂₂N₄O	322.1793	322.1801
16e	p-CONH₂	C₁₈H₂₁N₅O	323.1746	323.1751
16f	p-OCH₃	C₁₈H₂₂N₄O	310.1793	310.1797
16g	H	C₁₇H₂₀N₄	280.1688	280.1689