Table 4.

Mass spectra of azomethines 5-16.

Compd.	m/z (% Relative abundance)
5	272 (M+., 4.25), 227 (2.34), 139 (4.85), 138 (70.25), 107 (76.60), 92 (48.80), 91 (6.91), 65 (100.00).
6	227 (M+., 98.26), 211 (21.66), 166 (14.45), 154 (7.12), 139 (5.12), 104 (22.42), 77 (100.00)
7	252 (M+., 27.28), 251 (M-1⎤+., 83.41), 205 (56.73), 178 (4.88), 149 (4.88), 138 (54.55), 115 (70.16), 92 (48.50), 91 (47.95), 65 (100.00)
8	207 (M+., 33.52), 206 (M-1⎤+., 100.00), 178 (3.25), 128 (13.57), 115 (18.72), 77 (90.33).
9	242 (M+., 96.65), 212 (13.38), 195 (37.11), 167 (29.72), 151 (5.91), 120 (44.48), 76 (100.00)
10	267 (M+2⎤+., 20.42), 266 (M+1⎤+., 20.79), 265 (M+., 60.68), 230 (2.89), 202 (3.48), 154 (23.00), 127 (100.00), 77 (29.47), 51 (9.14).
11	277 (M+., 100.00), 261 (7.13), 216 (6.07), 204 (5.90), 178 (3.99), 154 (19.97), 127 (80.53), 101 (11.97), 85 (44.01), 83 (69.57), 77 (27.60).
12	247 (M+2⎤+., 26.19), 246 (M+1⎤+., 15.23), 245 (M+., 77.99), 230 (100.00), 201 (10.17), 167 (27.80), 149 (5.64), 139 (10.67), 114 (4.26), 77 (35.29), 63 (45.11).
13	257 (M+., 100.00), 242 (85.72), 227 (3.73), 198 (5.24), 170 (15.75), 154 (7.33), 134 (6.16), 115 (7.02), 77 (4.02), 64 (19.33).
14	228 (M+1⎤+., 16.62), 227 (M+., 100.00), 212 (71.79), 183 (4.33), 154 (3.40), 128 (5.33), 105 (3.08), 77 (55.04), 65 (38.15).
15	231 (M+2⎤+., 30.49), 230 (M+1⎤+., 33.41), 229 (M+., 90.60), 193 (2.89), 165 (4.57), 150 (2.05), 118 (22.99), 91 (100.00), 77 (9.79), 65 (61.60).
16	211 (M+., 100.00), 210 (M-1⎤+., 76.87), 167 (6.29), 120 (12.86), 118 (8.68), 91 (80.65), 65 (74.49).