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 3: Summary of physical and IR spectroscopic data of the 1-(4-chlorophenyl)-4-(2-aryl-1-diazenyl)-piperazine series (14).

Series #	X	% Yield	M.P. (°C)	Recr. Solv.	Crystal Appearance	IR (cm^-1)
14a	p-CO₂CH₃	36	211.0 - 211.8	Ethanol	Orange-Yellow Needles	OOP C=O C-O	865 1704 1272
14b	p-CN	49	185.3 - 186.0	Ethanol	Gold needles	OOP C≡N	850 2218
14c	p-Br	93	226.8 - 227.8	Ethanol	Creamy yellow Needles	OOP	837
14d	p-CH₃	52	195.2 - 196.3	Ethanol	Pale pink Needles	OOP	816
14e	p-OCH₃	30	192.9 - 194.0	Ethanol	Pale pink Plates	OOP C-O	836 1028, 1240
14f	p-NO₂	89	218.5 - 221.4	Ethyl acetate	Lustrous Blood-red needles	OOP NO₂	863 1327, 1506