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 18: Summary of 1H NMR spectroscopic data of the 1-(4-fluorophenyl)-4-(2-aryl-1-diazenyl)-piperazine series (13).

Series #	X	Aromatic (8H)		H_a (4H)	H_b (4H)	J_ab (Hz)	X
Series #	X	4-F-Ph Ring	Aryl Ring	H_a (4H)	H_b (4H)	J_ab (Hz)	X
13a	p-CO₂CH₃	6.96 - 7.04 (4H, m)	7.51 (2H, d, J=8.7), 8.05 (2H, d, J=8.7)	3.29 (t)	4.04 (t)	5.2	3.92 (3H, s)
13b	p-Br	7.01 - 7.04 (4H, m)	7.36 (2H, d, J=8.7), 7.48 (2H, d, J=8.8)	3.29 (t)	3.99 (br)	5.2	---
13c	p-CH₃	6.99 - 7.07 (4H, m)	7.29 (2H, d, J=7.8), 7.41 (2H, d, J=8.4)	3.30 (t)	3.96 (t)	5.2	2.39 (3H, s)