The following mass spectra of DMOX derivatives of fatty acids can be accessed directly from the tabulated links below.
No comments or interpretation are provided here, as the general principles are discussed elsewhere in these web pages.
Further spectra will be added as they become available.
The source of each fatty acid listed is that from which I obtained the spectrum in the course of my research efforts,
not necessarily the optimum source.
All spectra were obtained by GC-MS with Agilent mass spectrometers (various models over ~30 years) at an ionization energy of 70 eV.
DMOX derivatives of saturated straight-chain fatty acids (including those labelled with stable isotopes)
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| hexanoate (6:0) |
169 |
nonadecanoate (19:0) |
351 |
| octanoate (8:0) |
197 |
eicosanoate (20:0) |
365 |
| nonanoate (9:0) |
211 |
heneicosanoate (21:0) |
379 |
| decanoate (10:0) |
225 |
docosanoate (22:0) |
393 |
| undecanoate (11:0) |
239 |
tricosanoate (23:0) |
407 |
| dodecanoate (12:0) |
253 |
tetracosanoate (24:0) |
421 |
| tridecanoate (13:0) |
267 |
pentacosanoate (25:0) |
435 |
| tetradecanoate (14:0) |
281 |
hexacosanoate (26:0) |
449 |
| pentadecanoate (15:0) |
295 |
heptacosanoate (27:0) |
463 |
| hexadecanoate (16:0) |
309 |
octacosanoate (28:0) |
477 |
| heptadecanoate (17:0) |
323 |
nonacosanoate (29:0) |
491 |
| octadecanoate (18:0) |
337 |
triacontanoate (30:0) |
505 |
| |
| 3,3-D-hexadecanoate |
311 |
17,18-D-octadecanoate |
339 |
| 4,4-D-hexadecanoate |
311 |
D35-octadecanoate |
372 |
| 16,17-D-octadecanoate |
339 |
2,2-1H,D33-octadecanoate |
370 |
| |
| 2-13C-hexadecanoate |
310 |
1-13C-octadecanoate |
338 |
DMOX derivatives of saturated branched-chain fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 8-methyl-decanoate (anteiso) |
239 |
20-methyl-heneicosanoate (iso) |
393 |
| 10-methyl-undecanoate (iso) |
253 |
|
|
| 10-methyl-dodecanoate (anteiso) |
267 |
15-methyl-docosanoate |
407 |
| 11-methyl-dodecanoate (iso) |
267 |
20-methyl-docosanoate (anteiso) |
407 |
| 12-methyl-tridecanoate (iso) |
281 |
21-methyl-docosanoate (iso) |
407 |
| 3-methyl-tetradecanoate |
295 |
|
|
| 9-methyl-tetradecanoate |
295 |
22-methyl-tricosanoate (iso) |
421 |
| 12-methyl-tetradecanoate (anteiso) |
295 |
18-methyl-tetracosanoate |
435 |
| 13-methyl-tetradecanoate (iso) |
295 |
22-methyl-tetracosanoate (anteiso) |
435 |
| 3-methyl-pentadecanoate |
309 |
23-methyl-tetracosanoate (iso) |
435 |
| 14-methyl-pentadecanoate (iso) |
309 |
24-methyl-pentacosanoate (iso) |
449 |
| 10-methyl-hexadecanoate |
323 |
20-methyl-hexacosanoate |
463 |
| 14-methyl-hexadecanoate (anteiso) |
323 |
24-methyl-hexacosanoate (anteiso) |
463 |
| 15-methyl-hexadecanoate (iso) |
323 |
26-methyl-heptacosanoate (iso) |
477 |
| 14-methyl-heptadecanoate |
337 |
26-methyl-octacosanoate (anteiso) |
491 |
| 16-methyl-heptadecanoate (iso) |
337 |
28-methyl-nonacosanoate (iso) |
505 |
| 10-methyl-octadecanoate |
351 |
28-methyl-triacontanoate (anteiso) |
519 |
| 11-methyl-octadecanoate |
351 |
30-methyl-hentriacontanoate (iso) |
533 |
| 16-methyl-octadecanoate (anteiso) |
351 |
30-methyl-dotriacontanoate (anteiso) |
547 |
| 18-methyl-nonadecanoate (iso) |
365 |
32-methyl-tritriacontanoate (iso) |
561 |
| 14-methyl-eicosanoate |
379 |
32-methyl-tetratriacontanoate (anteiso) |
575 |
| 18-methyl-eicosanoate (anteiso) |
379 |
|
|
| 19-methyl-eicosanoate (iso) |
379 |
|
|
| |
| 4,8,12-trimethyl-tridecanoate |
309 |
8,10-dimethyl-hexadecanoate |
337 |
| 2,6,10,14-tetramethyl-pentadecanoate |
351 |
3,7,11,15-tetramethyl-hexadecanoate |
365 |
DMOX derivatives of monoenoic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 9-decenoate (9-10:1) |
223 |
12-octadecenoate (12-18:1) |
335 |
| 9-dodecenoate (9-12:1) |
251 |
13-octadecenoate (13-18:1) |
335 |
| 9-tetradecenoate (9-14:1) |
279 |
14-octadecenoate (14-18:1) |
335 |
| 13-tetradecenoate (13-14:1) |
279 |
15-octadecenoate (15-18:1) |
335 |
| 5-pentadecenoate (5-15:1) |
293 |
16-octadecenoate (16-18:1) |
335 |
| 2-hexadecenoate |
307 |
17-octadecenoate (17-18:1) |
335 |
| 4-hexadecenoate (4-16:1) |
307 |
|
|
| 5-hexadecenoate (5-16:1) |
307 |
9-nonadecenoate (9-19:1) |
349 |
| 6-hexadecenoate (6-16:1) |
307 |
11-nonadecenoate (11-19:1) |
349 |
| 7-hexadecenoate (7-16:1) |
307 |
|
|
| 9-hexadecenoate (9-16:1) |
307 |
5-eicosenoate (5-20:1) |
363 |
| 10-hexadecenoate (10-16:1) |
307 |
7-eicosenoate (7-20:1) |
363 |
| 11-hexadecenoate (11-16:1) |
307 |
9-eicosenoate (9-20:1) |
363 |
| 9-heptadecenoate (9-17:1) |
321 |
11-eicosenoate (11-20:1) |
363 |
|
|
13-eicosenoate (13-20:1) |
363 |
| 2-octadecenoate (2-18:1) |
335 |
5-docosenoate (5-22:1) |
391 |
| 3-octadecenoate (3-18:1) |
335 |
7-docosenoate (7-22:1) |
391 |
| 4-octadecenoate (4-18:1) |
335 |
13-docosenoate (13-22:1) |
391 |
| 5-octadecenoate (5-18:1) |
335 |
15-docosenoate (15-22:1) |
391 |
| 6-octadecenoate (6-18:1) |
335 |
15-tetracosenoate (15-24:1) |
419 |
| 7-octadecenoate (7-18:1) |
335 |
17-tetracosenoate (17-24:1) |
419 |
| 8-octadecenoate (8-18:1) |
335 |
17-hexacosenoate (17-26:1) |
447 |
| 9-octadecenoate (9-18:1) |
335 |
19-hexacosenoate (19-26:1) |
447 |
| 10-octadecenoate (10-18:1) |
335 |
19-octacosenoate (19-28:1) |
475 |
| 11-octadecenoate (11-18:1) |
335 |
21-triacontenoate (21-30:1) |
503 |
| |
| 15-methyl-hexadec-9-enoate |
321 |
7-methyl-hexadec-6-enoate |
321 |
DMOX derivatives of dienoic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 5,9-hexadecadienoate (5,9-16:2) |
305 |
5,8-nonadecadienoate (5,8-19:2) |
347 |
| 7,10-hexadecadienoate (16:2(n-6)) |
305 |
8,11-nonadecadienoate (8,11-19:2) |
347 |
| 9,12-hexadecadienoate (9,12-16:2) |
305 |
9,12-nonadecadienoate (9,12-19:2) |
347 |
|
|
10,13-nonadecadienoate (11,14-19:2) |
347 |
| 5,8-heptadecadienoate (5,8-17:2) |
319 |
11,13-nonadecadienoate (11,13-19:2) |
347 |
| 5,9-heptadecadienoate (5,9-17:2) |
319 |
11,14-nonadecadienoate (11,14-19:2) |
347 |
| 9,12-heptadecadienoate (9,12-17:2) |
319 |
|
|
| 4,7-octadecadienoate (4,7-18:2) |
333 |
5,11-eicosadienoate (5,11-20:2) |
361 |
| 5,8-octadecadienoate (5,8-18:2) |
333 |
5,13-eicosadienoate (5,13-20:2) |
361 |
| 6,9-octadecadienoate (6,9-18:2) |
333 |
8,11-eicosadienoate (8,11-20:2) |
361 |
| 7,10-octadecadienoate (7,10-18:2) |
333 |
9,13-eicosadienoate (9,13-20:2) |
361 |
| 8,11-octadecadienoate (8,11-18:2) |
333 |
11,14-eicosadienoate (20:2(n-6)) |
361 |
| 9,12-octadecadienoate (18:2(n-6)) |
333 |
5,9-docosadienoate (5,9-22:2) |
389 |
| 10,13-octadecadienoate (10,13-18:2) |
333 |
5,13-docosadienoate (5,13-22:2) |
389 |
| 11,14-octadecadienoate (11,14-18:2) |
333 |
7,13-docosadienoate (7,13-22:2) |
389 |
| 12,15-octadecadienoate (12,15-18:2) |
333 |
7,15-docosadienoate (7,15-22:2) |
389 |
| 13,16-octadecadienoate (13,16-18:2) |
333 |
5,9-tricosadienoate (5,9-23:2) |
403 |
| 14,17-octadecadienoate (14,17-18:2) |
333 |
5,9-tetracosadienoate (5,9-24:2) |
417 |
| 2,6-octadecadienoate (2,6-18:2) |
333 |
|
|
| 3,9-octadecadienoate (3,9-18:2) |
333 |
5,9-pentacosadienoate (5,9-25:2) |
431 |
| 5,9-octadecadienoate (5,9-18:2) |
333 |
5,9-hexacosadienoate (5,9-26:2) |
445 |
| 7,11-octadecadienoate (7,11-18:2) |
333 |
5,9-heptacosadienoate (5,9-27:2) |
459 |
| 9,11-octadecadienoate (9,11-18:2) |
333 |
5,9-octacosadienoate (5,9-28:2) |
473 |
| 10,12-octadecadienoate (10,12-18:2) |
333 |
17,21-octacosadienoate (17,21-28:2) |
473 |
| |
| 23-methyl-tetracosa-5,9-dienoate |
431 |
|
|
| 24-methyl-pentacosa-5,9-dienoate |
445 |
22-methyl-octacosa-5,9-dienoate |
487 |
DMOX derivatives of trienoic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 4,7,10-hexadecatrienoate (4,7,10-16:3) |
303 |
5,8,11-eicosatrienoate (20:3(n-9)) |
359 |
| 6,9,12-hexadecatrienoate (6,9,12-16:3) |
303 |
5,9,13-eicosatrienoate (5,9,13-20:3) |
359 |
| 7,10,13-hexadecatrienoate (16:3(n-3)) |
303 |
5,11,14-eicosatrienoate (5,11,14-20:3) |
359 |
| 9,12,15-hexadecatrienoate (16:3(n-1)) |
303 |
7,11,14-eicosatrienoate (7,11,14-20:3) |
359 |
| |
|
7,13,17-eicosatrienoate (7,13,17-20:3) |
359 |
| 8,11,14-heptadecatrienoate (17:3(n-3)) |
317 |
8,11,14-eicosatrienoate (20:3(n-6)) |
359 |
|
|
8,12,14-eicosatrienoate (8,12,14-20:3) |
359 |
| 3,9,12-octadecatrienoate (3,9,12-18:3) |
331 |
10,13,16-eicosatrienoate (20:3(n-4)) |
359 |
| 5,9,12-octadecatrienoate (5,9,12-18:3) |
331 |
11,14,17-eicosatrienoate (20:3(n-3)) |
359 |
| 6,8,10-octadecatrienoate (6,8,10-18:3) |
331 |
7,13,16-docosatrienoate (7,13,16-22:3) |
387 |
| 6,8,12-octadecatrienoate (6,8,12-18:3) |
331 |
5,9,17-tetracosatrienoate (5,9,17-24:3) |
415 |
| 6,9,11-octadecatrienoate (6,9,11-18:3 |
331 |
|
|
| 6,9,12-octadecatrienoate (18:3(n-6)) |
331 |
5,9,17-hexacosatrienoate (5,9,19-26:3) |
443 |
| 8,11,14-octadecatrienoate (18:3(n-4)) |
331 |
5,9,19-hexacosatrienoate (5,9,19-26:3) |
443 |
| 9,12,15-octadecatrienoate (18:3(n-3)) |
331 |
5,9,19-octacosatrienoate (5,9,19-28:3) |
471 |
| 11,14,17-octadecatrienoate (18:3(n-1)) |
331 |
5,9,21-octacosatrienoate (5,9,21-28:3) |
471 |
| 6,10,12-octadecatrienoate (6,10,12-18:3) |
331 |
5,9,22-nonacosatrienoate (5,9,22-29:3) |
485 |
| 9c,11t,13c-octadecatrienoate (9,11,13-18:3) |
331 |
5,9,23-triacontatrienoate (5,9,23-30:3) |
499 |
| 9c,11t,15c-octadecatrienoate (9,11,15-18:3) |
331 |
5,9,25-dotriacontatrienoate (5,9,25-32:3) |
527 |
DMOX derivatives of tetra-, penta- and hexaenoic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 4,7,10,13-hexadecatetraenoate (16:4(n-3)) |
301 |
5,8,12,14-eicosatetraenoate (5,8,12,14-20:4) |
357 |
| 6,9,12,15-hexadecatetraenoate (16:4(n-1)) |
301 |
5,8,13,17-eicosatetraenoate (5,8,13,17-20:4) |
357 |
|
|
5,8,14,16-eicosatetraenoate (5,8,14,16-20:4) |
357 |
| 5,8,11,14-octadecatetraenoate (18:4(n-4)) |
329 |
5,11,14,17-eicosatetraenoate (5,11,14,17-20:4) |
357 |
| 5,9,12,15-octadecatetraenoate (5,9,12,15-18:4) |
329 |
8,11,14,17-eicosatetraenoate (20:4(n-3)) |
357 |
| 6,8,10,15-octadecatetraenoate (6,8,10,15-18:4) |
329 |
|
|
| 6,9,11,15-octadecatetraenoate (6,9,11,15-18:4) |
329 |
7,10,13,16-docosatetraenoate (22:4(n-6)) |
385 |
| 6,9,12,15-octadecatetraenoate (18:4(n-3)) |
329 |
10,13,16,19-docosatetraenoate (22:4(n-3)) |
385 |
| 8,11,14,17-octadecatetraenoate (18:4(n-1)) |
329 |
5,9,19,23-triacontatetraenoate (5,9,19,23-30:4) |
497 |
| 5,8,11,14-eicosatetraenoate (20:4(n-6)) |
357 |
5,9,21,25-dotriacontatetraenoate (5,9,21,25-32:4) |
525 |
| |
| 5,8,11,14,17-octadecapentaenoate (18:5(n-1)) |
327 |
6,9,12,15,18-heneicosapentaenoate (21:5(n-3)) |
369 |
| 5,8,11,14,17-eicosapentaenoate (20:5(n-3)) |
355 |
4,7,10,13,16-docosapentaenoate (22:5(n-6)) |
383 |
| 5,8,11,15,17-eicosapentaenoate (5,8,11,15,17-20:5) |
355 |
7,10,13,16,19-docosapentaenoate (22:5(n-3)) |
383 |
| |
| 4,7,10,13,16,19-docosahexaenoate (22:6(n-3)) |
381 |
6,9,12,15,19,21-tetracosahexaenoate (24:6(n-3)) |
409 |
DMOX derivatives of acetylenic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| octadeca-6-ynoate |
333 |
|
|
| octadeca-9-ynoate |
333 |
octadeca-8,10-dien,12-ynoate |
329 |
| octadeca-7,9-diynoate |
329 |
|
|
| octadeca-8,10-diynoate |
329 |
eicosa-11-yn,trans-13-enoate |
359 |
| octadeca-9,11-diynoate |
329 |
docosa-13-yn,trans-15-enoate |
387 |
| octadeca-9-yn,trans-11-enoate |
331 |
tetracosa-15-yn,trans-17-enoate |
415 |
| octadeca-9-en,12-ynoate |
331 |
hexacosa-17-yn,trans-19-enoate |
443 |
| octadeca-14-yn,17-enoate |
331 |
octacosa-19-yn,trans-21-enoate |
471 |
| |
| octadeca-9-yn,11-trans,13-cis/trans-dienoate |
329 |
octadeca-6-yn-9,12,15-trienoate |
327 |
DMOX derivatives of natural cyclic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 9,10-methylene-hexadecanoate |
321 |
11,12-methylene-octadecanoate |
349 |
| 9,10-methylene-octadecanoate |
349 |
|
|
| |
| 8,9-methylene-heptadec-8-enoate |
333 |
9,10-methylene-octadec-9-enoate |
347 |
| |
| 11-cyclopentylundecanoate |
307 |
13-cyclopent-2-enyltridec-6-enoate |
331 |
| 11-cyclopent-2-enylundecanoate |
305 |
15-cyclopentylpentadecanoate |
363 |
| 13-cyclopentyltridecanoate |
335 |
15-cyclopent-2-enylpentadecanoate |
361 |
| 13-cyclopent-2-enyltridecanoate |
333 |
1-cyclopent-2-enylpentadec-9-enoate |
359 |
| 13-cyclopent-2-enyltridec-4-enoate |
331 |
|
|
| |
| 6-(6-hexyl-cyclohexadienyl)-hexanoate |
331 |
7-(5-pentyl-cyclohexadienyl)-heptanoate |
331 |
| |
| 11-phenylundecanoate |
315 |
13-phenyltridecanoate |
343 |
|
|
15-phenylpentadec-9-enoate |
369 |
DMOX derivatives of oxygenated fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 12,13-epoxyoctadec-9-enoate |
349 |
|
|
| |
| 8-(5-hexyl-2-furyl)-octanoate |
347 |
10,13-epoxy-11,12-dimethyl-octadecadienoate |
375 |
| 10,13-epoxy-11,12-dimethyl-hexadecadienoate |
347 |
12,15-epoxy-13,14-dimethyl-octadecadienoate |
375 |
| 10,13-epoxy-11-methyl-octadecadienoate |
361 |
12,15-epoxy-13-methyl-eicosadienoate |
389 |
| |
| 12-methoxy-octadec-9-enoate |
365 |
17-methoxyoctadec-9-enoate |
365 |
| 15-ethoxypentadecanoate |
339 |
19-ethoxynonadec-9-enoate |
393 |
| 17-ethoxyheptadec-9-enoate |
365 |
|
|
| |
| 12-hydroxy-dodecanoate |
269 |
20-hydroxy-eicosanoate - TMS |
453 |
| 15-hydroxy-pentadecanoate |
311 |
22-hydroxy-docosanoate |
409 |
| 16-hydroxy-hexadecanoate |
325 |
22-hydroxy-docosanoate - TMS |
481 |
| 16-hydroxy-hexadecanoate - TMS |
397 |
24-hydroxy-tetracosanoate |
437 |
| 18-hydroxy-octadecanoate |
353 |
24-hydroxy-tetracosanoate - TMS |
509 |
| 18-hydroxy-octadecanoate - TMS |
425 |
|
|
| 20-hydroxy-eicosanoate |
381 |
26-hydroxy-hexacosanoate - TMS |
537 |
| |
| 9-hydroxy-octadec-12-enoate |
351 |
18-hydroxy-octadec-9-enoate - TMS |
423 |
| 9-hydroxy-octadec-12-enoate - TMS |
423 |
14-hydroxy-eicos-11-enoate |
379 |
| 12-hydroxy-octadec-9-enoate |
351 |
14-hydroxy-eicos-11-enoate - TMS |
451 |
| 12-hydroxy-octadec-9-enoate - TMS |
423 |
20-hydroxy-eicos-11-enoate |
379 |
| 18-hydroxy-octadec-9-enoate |
351 |
20-hydroxy-eicos-11-enoate - TMS |
451 |
| |
| 15-hydroxy-octadeca-9,12-dienoate |
349 |
|
|
| 15-hydroxy-octadeca-9,12-dienoate - TMS |
421 |
2-hydroxy-octadeca-9,12,15-trienoate |
347 |
DMOX derivatives of dicarboxylic fatty acids
|
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 1,6-hexanedioate |
252 |
1,14-tetradecanedioate |
364 |
| 1,7-heptanedioate |
266 |
1,16-hexadecanedioate |
392 |
| 1,8-octanedioate |
280 |
1,18-octadecanedioate |
420 |
| 1,9-nonanedioate |
294 |
1,20-eicosanedioate |
448 |
| 1,10-decanedioate |
308 |
1,22-docosanedioate |
476 |
| 1,11-undecanedioate |
322 |
1,24-tetracosanedioate |
504 |
| 1,12-dodecanedioate |
336 |
|
|
| |
| 1,18-octadec-9-enedioate |
418 |
1,20-eicos-9-enedioate |
446 |
| 1,18-octadec-6,9-dienedioate |
416 |
|
|
DMOX derivatives of halogenated fatty acids |
| Fatty acid |
M+ |
Fatty acid |
M+ |
| |
| 16-fluoro-hexadecanoate |
327 |
20-fluoro-eicosanoate |
383 |
| 18-fluoro-octadecanoate |
355 |
20-fluoro-eicos-9-enoate |
381 |
| 18-fluoro-octadec-9-enoate |
353 |
20-fluoro-eicos-11-enoate |
381 |
| 18-fluoro-octadec-9,12-dienoate |
351 |
|
|
| |
| 12,12,12-trifluoro-dodecanoate |
307 |
6,6-difluoro-octadecanoate |
373 |
| 2-fluoro-hexadecanoate |
327 |
10,10-difluoro-octadecanoate |
373 |
| 2-fluoro-octadecanoate |
355 |
18,18,18-trifluoro-octadecanoate |
391 |
| 2,2-difluoro-octadecanoate |
373 |
|
|
| |
| 2-bromo-hexadecanoate |
387/9 |
|
|
