Table 5:
Physical data for Methyl 4-[2-(4-phenethylpiperazino)-1-diazenyl]benzoate (7).
Crude
Mp
Recryst.
Crystal
No.
X
yield
appearance
IR (cm-1)
(%)
(℃)
Solv.
1722(C=O)
1278(C-O)
Creamy white
859(para)
7a
699&774
p-CO2CH3
97.1%
98-99
Ethanol
prisms
(mono-sub)