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 7: Summary of mass spectroscopic data of the 1-phenyl-4-(2-aryl-1-diazenyl)-piperazine series (12).

Series #	X	Formula	Calc. Mass (amu)	Found Mass (amu)
12c	p-CH₃	C₁₇H₂₀N₄	280.1688	280.1697
12d	p-Br	C₁₆H₁₇N₄Br	344.0636	344.0632
12e	p-OCH₃	C₁₇H₂₀N₄O	296.1637	296.1622
12f	p-COCH₃	C₁₈H₂₀N₄O	308.1637	308.1636
12g	p-Cl	C₁₆H₁₇N₄Cl	300.1142	300.1143
12i	o-Br	C₁₆H₁₇N₄Br	344.0636	344.0653