. 2009 Aug 7;17(3):255–258. doi: 10.1016/j.jsps.2009.08.001

Table 2.

IR and ¹H NMR Spectral data of compounds RP 1–5.

Compound	IR (cm⁻¹) (KBr)	¹H NMR (DMSO) (δ ppm)
RP 1	(i) N–H str – 3341	1.867 (1H, s, aliphatic N–H)
	(ii) C N str – 1598	2.507 and 2.880 (8H, piperazine protons)
	(iii) C C str – 1564	4.263 (2H, bs, 1°NH₂), 8.423 (1H, s, C–5H)
	(iv) C–Br str – 536	6.646 (1H, s, C–2¹H), 6.929–8.236 (7H, aromatic protons)

RP 2	(i) N–H str – 3392	1.873 (1H, s, aliphatic N–H)
	(ii) C N str – 1602	2.507 and 2.853 (8H, piperazine protons)
	(iii) C C str – 1567	4.145 (2H, bs, 1°NH₂), 7.208 (1H, s, C–5H), 6.751–8.699 (13H, aromatic protons)

RP 3	(i) N–H str – 3398	1.879 (1H, s, aliphatic N–H),
	(ii) C N str – 1603	2.506 and 2.877 (8H, piperazine protons)
	(iii) C C str – 1575	2.377 (3H, s, benzylic protons), 3.740 (2H, bs, 1°NH₂)
		7.564 (1H, s, C–5H), 6.520–8.110 (8H, aromatic protons)

RP 4	(i) N–H str – 3400	1.894 (1H, bs, aliphatic N–H)
	(ii) C N str – 1572	2.506 and 2.99 (8H, piperazine protons)
	(iii) C–Cl str – 655	3.939 (2H, bs, 1°NH₂), 7.482 (1H, s, C–5H)
		6.375 (1H, s, C–2′OH), 6.732–8.113 (8H, aromatic protons)

RP 5	(i) N–H str – 3405	1.871 (1H, s, aliphatic N–H)
	(ii) C N str – 1602	2.506 and 2.865 (8H, piperazine protons)
	(iii) C C str – 1575	3.999 (2H, bs, 1°NH₂), 7.606 (1H, s, C–5H)
		6.584–7.838 (9H, aromatic protons)