Condensation Polymers of Terephthalic Acid and 1,4-Diaminobutane and Their Schiff Base Complexes

Table 2

IR spectral assignments of amides and their metal complexes.

Compounds	Assignments cm^−1
	𝜈NH	Amide (I)	Amide (II)	𝜈C=N	𝜈M–O	𝜈M–N
PTTA	3305 s	1630 s	1545 s	—	—	—
PTTA-Co(II)-Sal′	3305 s	1630 s	1545 s	1550 s	560 s	480 m
PTTA-Co(II)-Naphthal′	3305 s	1630 s	1540 s	1550 s	560 s	485 w
PTTA-Ni(II)-Sal′	3305 s	1630 s	1540 s	1550 sh	540 s	485 s
PTTA-Ni(II)-Naphthal′	3305 s	1630 s	1535 s	1550 s	570 s	470 m
PTTA-Cu(II)-Sal′	3305 s	1630 s	1530 s	1555 s	520 s	490 s
PTTA-Cu(II)-Naphthal′	3305 s	1630 s	1535 s	1560 s	560 m	480 s