Table 4.

IR data (cm⁻¹) for H₂Sal, 5-ClH₂Sal, sodium salicylate (NaHSal) and copper(II) salicylate adducts with Neo.

	Ph–OH or Ph–O− Group			COOH or COO− Group
	ν(O–H)	ν(C–O)	Type of Coordination	ν(C=O)	νas(COO−)	νs(COO−)	ν(C–O)	∆ b	Type of Coordination
H2Sal	3230m	1291vs		1653s, br			1235s, br
5-ClH2Sal	3235m	1288vs		1659s, br			1219s1230sh
NaHSal	3219w	1284vs, br	non-coordinated		1578vs a	1373vs		205	ionic
(1)		1307vs	unidentate		1598vs a	1358s		240	unidentate
(2)		1301s	bridging		1593s a	1358vs		235	unidentate
(3)	3218w	1325s1290m	unidentatenon-coordinated		1618vs1600vs1588vs a	1364m 1406vs 1426vs		254194162	unidentateasym. chelatingbridging

Notes: vs, very strong; s, strong; m, medium; w, weak; sh, shoulder; br, broad. ^a Mixed bands or some of the observed bands also belong to another vibrational mode. ^b ∆ = ν_as(COO⁻) − ν_s(COO⁻).