Table 4: Physical data for series of 1-(3-methylbenzyl)-4-(aryldiazenyl)-piperazines (6).
| |
|
Crude |
|
Recryst. |
Crystal |
|
| No. |
X |
yield |
mp(℃) |
appearance |
IR (cm-1) |
| (%) |
Solv. |
|
| 6a |
|
|
|
|
Pale orange |
2220(CN) |
| p-CN |
90% |
105-106 |
iso-propanol |
Needles |
841(para) |
| |
|
783 and 696(meta) |
| 6b |
|
|
|
|
Lustrous |
1710(C=O) |
| |
|
|
|
Flesh-colored |
860(para) |
| |
p-CO2CH3 |
93% |
82-83 |
ethanol |
Plates |
775 & 698 (meta) |
| 6c |
|
|
|
|
Tiny buff |
829(para) |
| p-Br |
87% |
77-78 |
Iso-propanol |
Colored |
| |
Needles |
777 & 695 (meta) |
| 6d |
|
|
|
|
Pink |
823(para) |
| |
p-CH3 |
62% |
85-86 |
Iso-propanol |
Needles |
781 & 696 (meta) |
| |
|
|
|
|
Tiny |
1514 & |
| 6e |
|
|
|
|
Red-brown |
1376(NO2) |
| |
|
|
|
Needles |
853(para), |
| |
p-NO2 |
94% |
82-83 |
Iso-propanol |
|
781 & 694(m) |