Table 1: Summary of physical and IR spectroscopic data of the 1-phenyl-4-(2-aryl-1-diazenyl)-piperazine series (12).

Series #	X	% Yield	M.P. (C)	Recr. Solv.	Crystal Appearance	IR (cm-1)
12c	p-CH3	39	164 - 166	Ethanol	Tiny pale Yellow needles	OOP	819
12d	p-Br	55	157 - 159	Ethanol	Tiny Orange needles	OOP	830
12e	p-OCH3	20	182 - 184	Ethanol	lustrous metallic Plates	OOP C-O	834
							1157, 1245
12f	p-COCH3	51	165 - 167	Ethanol	Small Orange plates	OOP C=O	843 1681
12g	p-Cl	38	161 - 162	Ethanol	Lustrous gold Plates	OOP	834
12i	o-Br	95	Oil	Oil	-	OOP	760