Journal of Mass Spectrometry p. 885 - 892 (1995)
Update date:2022-08-03
Topics:
Lepine
Milot
Mamer
DDT and several of its metabolites were synthesized with their aromatic chlorines enriched with 37Cl. The mass spectra of these compounds were recorded under electron impact and under methane positive-ion and electron-capture negative-ion chemical ionization. The regioselectivity of the dechlorination reactions was determined by measurement of the relative proportions of the unlabeled aliphatic versus the labeled aromatic chlorines in the various fragment ions observed. For all the α,β-unsaturated compounds studied under electron impact ionization, the regioselectivity is small, as both the aromatic and the aliphatic chlorines are lost. Under positive-ion chemical ionization, the dechlorination is highly regioselective, the aliphatic chlorines being almost exclusively lost. Under electron-capture negative-ion chemical ionization, the regioselectivity is also very high and the reactivity of the various chlorines is often controlled by the position of the aromatic chlorines.
View MoreXi'an Kaixiang Photoelectric Technology Co., Ltd
website:http://www.kxmaterials.com/
Contact:86-29-15991651477
Address:Building 6, Biopharmaceutical Industry R&D Cluster Base, No. 16, Caotang 4th Road, Caotang Science and Technology Industrial Base, High-tech Zone, Xi'an City, Shaanxi Province, China
Jiaxing Trustworthy Import And Export Co.,Ltd
Contact:+86-573-82030555
Address:Room 1202, Unit B, Charming plaza,No.1558 East Zhongshan Road , Jiaxing City, Zhejiang Province, China.
Luojiang Chenming Biological Products Co
Contact:+86 15000297032
Address:GROUP NO.4, HE SHENG VILLAGE, PANLONG TOWN,
Contact:27-792-602929
Address:SIDNEY MUFAMADI STREET 009949 X44 0700 POLOKWANE,LIMPOPO
Contact:86-15588110016
Address:LINYI CITY,SHANDONG PROVINCE,CHINA
Doi:10.1002/mrc.2460
(2009)Doi:10.1039/C39890001391
(1989)Doi:10.1002/ardp.19733061107
(1973)Doi:10.1021/jo50012a008
(1952)Doi:10.1016/S0022-1139(02)00242-7
(2003)Doi:10.1039/j39660000157
(1966)