Synthesis of Malononitrile-Condensed Disperse Dyes and Application on Polyester and Nylon Fabrics

Table 4

Infra-red spectral data for the dyes derived from 4-amino-3-nitrobenzaldehyde.

DYE	Aromatic; C–H	Aliphatic; C–H	Carbonyl; C=O,; Lactum	Azo; N = N	Aldel-hyde; CHO,	Cyano; C≡N	Hydroxyl; OH	Aromatic; C–H	Aromatic; Nitro; NO2	α-sub; Naphthol	β-sub; Naphthol
	Stretch	Bend	Stretch	Stretch	Stretch	Stretch	Stretch	Bending	Bending
D1	2925.00	2852.00		1406.78	1600.07	—	3410.53	833.81	1509.10	—	—
D2	3088.67	2849.95	1615.31	1425.08	1689.18	—		821.06	1573.38	—	—
D3	2924.40	—	—	1404.27	1697.93	—	3439.49	—	1573.76	835.85; 872.72	—
D4	2960.00	2815.00	—	1407.95	1693.76	—	3390.47	814.22	1557.56	—	844.00; 878.14
D5	2923.49	2880.00	—	1428.00	—	2357.50	3620.08	672.36	1513.80	—	—
D6	2900.00	—	1620.00^+; 1678.93^−	1427.00	—	2357.61	—	672.98	1365.00	—	—
D7	2923.50	2850.00	—	1420.00	—	2359.89	3600.00	672.65	1567.64	820.00	—
D8	2923.94	—	—	1420.00	—	2359.81	3623.46	672.16	1550.62	—	814.00