Table 2.

The FTIR spectral data of the compounds [frequency (cm^-1)].

[Mn(C5H7O2)3]	[Mn(C5H7O2)2L1]	[Mn(C5H7O2)2L2]	Assigment of bands a
430 m	417 m	425 m	ν(Mn-O), δ(Mn-O=C)
460 m	482 m	487 m	ν(Mn-O), ν(C-CH3), ν(C=C)
550 m	613 m	575 mb	πring+ ν(Mn-O)
588 s	654 s	633 m	ν(Mn-O), δ(Mn-O=C, CH3-C=O)
669 ms	689 m	689 m	ν(C-CH3), ν(Mn-O), δ(O=C-CH3)
		771 m	γ(N-H).
778 s	782 s	778 w c	π(C-H)
	875 m	876 m	δ(COO)
928 s	928 m	927 m	ν(C-CH3)
1020 s	1020 s	1023 s	γ(CH3)
1185 w	1173 w	1180 w	δ(C=CH)
1253 s	1285 s	1281 m	ν(C=C), ν(C-CH3)
		1312 m	ν(C-N), δ(N-H)
	1338 s		νsCOOH)
1350 s		1361 s	δ(CH3)
1388 s	1388 w		δ(CH3)
	1458 m	1407 1462 m	νs(COO) δ(=CH)
1512 s	1523 s	1514 s	ν(C=C), δ(C=CH)
1567 s	1552 s	1551 s	ν(C=C), δ(C=CH)
1595 s	1615 s	1595 s	νas(COO)
	1635 s		ν(C=C)
		1651 m	ν(C=O)
	1708 m		νas(COOH)
2920 w	2915 w	2920 w	ν(C-H)
	3229 m	3213 m	ν(=CH)
		3559 m	ν(N-H)
	3564 s	3400 s	ν(O-H)

Notes:

^aRelative intesity: s-strong, m-medium, w-weak and

^bπ_ring, ring deformation out-of-plane that includes torsions τO-C-/C-/C, τO-/C-/C-/H, τCH₃-C-C-H;

^cπ(C-/H), C-C-C-H out-of-plane vibration.