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Fast atom bombardment mass spectra of keto acid and keto ester phosphoranes

✍ Scribed by Andrew D. Abell; Bruce M. Clark; Kathryn B. Morris; Jane M. Taylor

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
215 KB
Volume
28
Category
Article
ISSN
1076-5174

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✦ Synopsis

Positive-ion fast atom bombardment mass spectra of 13 keto acid and keto ester phosphoranes were examined. All compounds gave a protonated molecular ion and characteristic peaks at m/z 303,279,262 and 201. 4 5 6 7 a 9 10 11 12 13 m/z (relative abundance, "h) 477 (41). 403 (54). 377 (58). 347 (45). 321 (99). 303 (82), 279 (29). 262 (24). 201 (21 1, 183 (58). 152 (100)' 279 (26). 262 (15). 201 (18). 183 (32). 152 (16)" 279 (7), 262 (8), 201 (34). 183 (15). 167 (100). 152 (12)" 449 (loo), 403 (45), 375 (34), 303 (68). 279 (44). 262 (23). 201 (45)' 463 (100). 417 (55). 375 (59), 303 (70). 279 (20). 262 (20). (201 18)b 477 (23). 431 (27). 375 (27). 303 (loo), 279 (24). 262 (20). 201 (18)' 557 (19). 555 (20), 51 1 (7), 509 (7). 475 (1 9). 447 (7). 375 (25). 357 (7). 303 (43). 279 (loo), 262 (20). 201 (74)" 303 (loo), 279 (71). 262 (20). 201 (34)" 375 (89). 347 (14), 303 (100). 279 (33). 262 (36), 201 (34)" 491 (40). 445 (33). 390 (6), 375 (26). 347 (6), 303 (100). 279 (21), 262 (19). 201 (19)" 702 (86). 656 (22). 390 (64), 375 (71). 303 (100). 279 (21). 262 (43). 201 (22). 183 (38)b 776 (38). 730 (35). 390 (35). 375 (80). 303 (100). 279 (32), 262 (51), 201 (51). 183 (80)b 746 (81). 700 (56). 390 (65). 375 (89). 303 (100). 279 (26), 262 (63). 201 (38). 183 (156), 165 (45)b 491 (41),417 (57),403 (11),347 (56). 303 (100). 643 (lo), 569 (8), 403 (15), 347 (30). 303 (30). 449 (62). 403 (47). 375 (72), 361 (62), 345 (1 9). 61 5 (59). 569 (37), 449 (8). 431 (1 3). 403 (1 5). a Spectra measured in 'magic bullet'. Spectra measured in nitrobenzyl alcohol.

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