Molecular ions [M]+˙ (relative abundance%) and significant fragmentary ions observed in EI-MS spectra of amidesa.
| Amide | [M]+˙ | RCO+ | Fragmentary ions |
|---|---|---|---|
| 1a | 317 (90) | 221 (100) | 274 (32), 193 (20), 190 (32) |
| 1b | 305 (100) | 221 (55) | 205 (40), 190 (22) |
| 1c | 349 (37) | 221 (100) | 222 (63), 190 (15) |
| 1d | 307 (85) | 221 (95) | 236 (42), 222 (100), 191 (26), 190 (27), 181 (55), 179 (27) |
| 1e | 307 (50) | 221 (100) | 222 (60), 190 (26) |
| 1f | 305 (60) | 221 (65) | 222 (100), 194 (25), 191 (35), 190 (25), 84 (69) |
| 2a | 319 (20) | 191 (100) | 276 (12), 262 (10), 163 (11), 151 (15) |
| 2b | 277 (43) | 191 (100) | 206 (35), 192 (40), 151 (45) |
| 2c | 277 (31) | 191 (100) | 192 (23), 163 (14) |
| 2d | 275 (55) | 191 (100) | 192 (35), 163 (20), 161 (20), 84 (42) |
| 2e | 275 (51) | 191 (100) | 163 (12) |
| 3a | 295 (21) | 209 (72) | 211 (70), 183 (13), 181 (11), 126 (27), 102 (100), 86 (52), 56 (34) |
| 3b | 295 (10) | 209 (74) | 211 (75), 102 (100) |
| 3c | 337 (5) | 209 (100) | 211 (91), 102 (100), 44 (83) |
| 4a | 261 (57) | 175 (100) | 176 (32), 145 (81), 117 (37), 89 (47) |
| 4b | 303 (18) | 175 (100) | 145 (42), 89 (26) |
| 5a | 259 (7) | 131 (100) | 216 (14), 103 (33) |
| 5b | 217 (7) | 131 (100) | 188 (10), 146 (20), 103 (45), 77 (25) |
| 5c | 217 (18) | 131 (100) | 103 (60), 86 (26), 77 (28) |
| 5d | 215 (26) | 131 (100) | 187 (14), 103 (57), 77 (32) |
| 6a | 285 (63) | 201 (87) | 202 (25), 173 (42), 143 (35), 115 (100), 84 (35) |
| 6b | 287 (55) | 201 (57) | 173 (99), 115 (100) |
| 7a | 273 (87) | 187 (100) | 188 (35), 155 (20), 159 (62), 144 (60), 121 (42), 115 (60) |
| 7b | 315 (26) | 187 (100) | 144 (27), 128 (27), 115 (27), 44 (35) |
| 7c | 271 (67) | 187 (100) | 159 (30), 144 (40), 115 (42), 84 (35) |
| 8a | 321 (18) | 235 (37) | 237 (35), 156 (25), 128 (100), 96 (45) |
| 8b | 319 (25) | 235 (25) | 237 (25), 156 (27), 138 (27), 129 (28), 128 (100), 84 (74) |
| 9 | 321 (35) | 223 (15) | 222 (100), 194 (40), 181 (25), 179 (55), 44 (75) |
| 10 | 289 (35) | 205 (5) | 204 (25), 140 (31), 135 (25), 127 (100), 112 (52), 84 (35) |
a
RCO+ = [[M] − NRdRe]+.