Table 4.

¹H chemical shift in ppm (observed and theoretical) of H-4, M-4, Br-4 and Cl-4.

	Experimental				Theoretical
	H-4	M-4	Br-4	Cl-4	H-4	M-4	Br-4	Cl-4
H (8)	7.90	7.86	7.97	7.88	10.05	10.12	10.08	10.22
H (7)	7.76	7.74	7.80	7.66	9.60	9.32	9.37	9.42
H (6)	7.65	7.65	7.73	7.53	9.42	9.57	9.48	9.56
H (5)	7.89	7.88	7.95	7.77	9.55	9.58	9.70	6.67
R-(3)	5.64	2.06	-		7.01	3.31
NH	7.50	6.49	7.42	7.80	6.03	5.83	6.28	6.25
H(a)	0.88	0.84	0.89	0.86	2.05	1.93	2.07	2.07
H(b)	1.33	1.27	1.33	1.32	2.28	2.21	2.37	2.30
H(g)	1.54	1.48	1.59	1.52	2.62	2.51	2.38	2.50
H(h)	3.15	3.45	3.74	2.79	3.88	4.25	4.79	4.82