Journal of the Chemical Society - Faraday Transactions p. 3237 - 3241 (1990)
Update date:2022-08-16
Topics:
Hindson, Andrew C.
Walton, John C.
The EPR spectra of cycloheptylmethyl, cyclohept-4-enylmethyl and 1,3-dioxacyclohept-5-enylmethyl radicals have been observed.The cycloheptylmethyl radical spectrum shows only a single, average conformation, but for the cycloheptene and dioxacycloheptene rings the CH2* group proved to be a useful probe of the conformations.The preferred conformation of the 1,3-dioxacycloheptene ring was found to depend on the type of substitution at C(2).For the 2-CH2* radical, twist-boat and chair conformers were observed with an Arrhenius activation barrier to inversion of 5 kcal mol-1.For the 2-CH3, 2-CH2* radical the main conformation was the twist-boat.For the 2-Ph, 2CH2* radical the main conformation was the chair; the rotation of the CH2* group was found to be restricted by a barrier of ca. 7.5 kcal mol-1, probably because of steric interaction from two syn axial hydrogens on C(4) and C(7).
View MoreWUXI HONOR SHINE CHEMICAL CO.,LTD
Contact:+86-510-83593312
Address:No.1699 Huishan avenue,Huishan district,Wuxi ,Jiangsu,China,214177.(Wuxi Huishan Ecomonic Develop Zone )
Jinan Trio PharmaTech Co., Ltd
Contact:86-531-88811783；+(0)13153010282
Address:2766 Yingxiu Road, Jinan High-Tech Zone, China
Suzhou Kangrun Pharmaceutical, Inc
Contact:86-512-63912376，63913329
Address:Building 2, No. 2358 ,Chang'an Rd, Wujiang Economic Development Zone Pioneering park, china
CHANGZHOU HANGYU PHARMACEUTICAL TECHNOLOGY CO., LTD
website:http://www.czyys.com
Contact:0086-519-88802789
Address:No.300,Yanling Middle Road, Changzhou, Jiangsu, China
Shanghai Synmedia Chemical Co., Ltd
Contact:+86-21-38681880
Address:6th Floor, 11A Building, No.528 Ruiqing Road, Heqing town, Pudong new district, Shanghai China
Doi:10.1021/ja952028u
(1996)Doi:10.1080/00397919208021104
(1992)Doi:10.3987/COM-05-S(T)72
(2006)Doi:10.1039/C29690000535
(1969)Doi:10.1016/j.bmc.2020.115846
(2021)Doi:10.1021/acs.inorgchem.7b03195
(2018)
