Organic Mass Spectrometry p. 1167 - 1178 (1993)
Update date:2022-07-29
Topics:
Molenaar-Langeveld, Tineke A.
Ingemann, Steen
Nibbering, Nico M. M.
The loss of CHO2(.) from the molecular ion of phenoxyacetic acid and the expulsion of an H(.) atom from ionized anisole lead to phenoxymethylene ions, which fragment predominantly by CO loss on the microsecond time-scale.Carbon-13 labelling reveals that ca. 90percent of the CO molecules expelled from the metastable ions derived from phenoxyacetic acid incorporate the carbon atom from the 1-position of the phenyl group of the parent compound, whereas the residual CO molecules contain one of the other carbon atoms of the aromatic ring.The 2-fluoro- and 2-methylphenoxymethylene ions derived from the appropriate aryloxyacetic acids behave similarly, i.e. the carbon atom of the methylene group of the parent compound is not incorporated in the expelled CO molecules.In contrast, ca. 45percent of the CO molecules eliminated from the metastable phenoxymethylene ions formed from ionized anisole contain the carbon atom of the methyl group, while the remaining part contains the carbon atom from the 1-position of the phenyl ring of the parent compound.This result is taken as evidence for the occurrence of a skeletal rearrangement of the anisole molecular ion leading to an interchange between the carbon atom of the methyl group and the carbon atom at the 1-position of the ring.The elimination of CO from the metastable ions generated from either phenoxyacetic acid or anisole gives rise to a composite metastable peak.Conclusive evidence as to the formation of
Liaoning Yufeng Chemical Co.,Ltd.
Contact:86-0419-3418888
Address:The metallurgical industrial zone,shoushan town, Liaoyang, Liaoning, China
Hebei Tianxiang Biological & Pharmaceutical Co., Ltd
Contact:86-0312-6615158
Address:No 42 fazhan street qingyuan county
Contact:86-512-87182056
Address:No.128 Fangzhou Rd, Suzhou Industrial Park, China, 215125, China
Jiaxing Taixin Pharmaceutical Chemical Co., Ltd
Contact:0573-82613601
Address:Chemical Park, Jiaxing, Zhejiang, China
FREEBARQUE DEVELOPMENT GROUP LIMITED
Contact:+86(0)10-5109 5335 or 5109 5345
Address:Room602,Block1-B,LINGDI OFFICE,NO.13 BEIYUAN ROAD
Doi:10.1039/b713668b
(2007)Doi:10.1021/ml500113s
(2014)Doi:10.1139/v65-123
(1965)Doi:10.1016/S0040-4020(97)00665-0
(1997)Doi:10.1016/S0040-4039(97)01221-5
(1997)Doi:10.1016/S0040-4020(01)90011-0
(1987)