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 22: Summary of ¹H NMR spectroscopic data of the 1-(4-acetophenyl)-4-(2-aryl-1-diazenyl)-piperazine series (17).

Series #	X	Aromatic (8H)		H_a (4H)	H_b (4H)	J_ab (Hz)	H_c (3H)	X
Series #	X	4-COCH₃ Ph	Aryl Ring	H_a (4H)	H_b (4H)	J_ab (Hz)	H_c (3H)	X
17a	p-CO₂CH₃	6.89 (2H, d, J=9.0), 7.89 (2H, d, J=9.0)	7.47 (2H, d, J=8.7), 8.01 (2H, d, J=8.7)	3.57 (t)	4.01 (t)	5.4	2.51 (s)	3.89 (3H, s)
17b	p-Br	6.92 (2H, d, J=9.0), 7.92 (2H, d, J=9.0)	7.35 (2H, d, J=8.8), 7.48 (2H, d, J=8.7)	3.58 (t)	3.98 (t)	5.4	2.55 (s)	---
17c	p-CH₃	6.93 (2H, d, J=9.0), 7.92 (2H, d, J=9.0)	7.18 (2H, d, J=8.1), 7.38 (2H, d, J=8.2)	3.57 (t)	3.94 (t)	5.5	2.54 (s)	2.36 (3H, s)
17d	p-NO₂	6.96(2H, d, J=9Hz) 7.96(2H, d, J=9Hz)	7.59(2H, d, J=7Hz) 8.26(2H,d ,J=7.1HZ	4.14 (t)	3.66 br (t)	5.5	2.59 (s)	-
17e	p-CN	6.90(2H,d J=9Hz) 7.91(2H,d, J=9Hz	7.50(2H,d, J=8.7Hz 7.62(2H,d, J=8.6Hz)	4.05 (t)	3.59 (t)	5.3	2.53 (s)	-
17f	p-CO₂Et	6.92(2H,d, J=9Hz) 7.91(2H,d, J=9.1Hz)	7.48(2H,d, J=8.8Hz) 8.04(2H,d, J=8.8 Hz	4.04 (t)	3.59 (t)	5.5	2.53 (s)	1.39(3H,t, J=7.2Hz 4.36(2H,q, J=7.5Hz
17g	H	6.91(2H,d, J=8.9Hz) 7.91(2H, d J=9.0Hz	7.20(1H,t J=7.3Hz) 7.36(2H,t, J=7.8Hz) 7.46(2H,dd J=5.8Hz)	3.96 (t)	3.57 (t)	5.4	2.53 (s)	-