Synthesis and Crystalline Structure of Zinc Complexes with Antihypertensive Drug Lisinopril

Table 1

Principal IR and Raman bands (cm⁻¹) for lisinopril, LISZn1, and LISZn2 compounds.

Lisinopril		LISZn1		LISZn2		Assignment^a
IR^b	Raman^b	IR	Raman	IR	Raman
3556w		3450m		3452m		ν(OH)
3397w				3315vw		ν(NH)
3290vw		3247vw		3241vw		ν(NH2)
3027vw	3058m	3024vw	3058m	3027vw	3056m	ν(CH)
2966w	2982m	2952w	2979m	2955w	2983w	ν(CH), νa(CH3)
2925vw	2934s		2927s		2935w	νa(CH2)
2877vw	2878w	2874vw	2881m	2885vw	2865w	νs(CH2), νs(CH3)
1657s	1654w	1602vs	1604m	1603vs	1604vs	ν(CO)amide
1578m	1585m		1585m		1585m	νa(COO)
1391m	1398vw	1392m	1398vw	1396m	1400vw	νs(COO)
		1088m	933vs			ν(ClO)

^aTentative assignment according to [6, 18–20]. ν = stretching; a = antisymmetric; s = symmetric; d = deformation. ^bs = strong; m = medium; w = weak; v = very.