Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 1237 - 1248 (1983)
Update date:2022-08-04
Topics:
Frey, Henry M.
Pidgeon, Ivy M.
Methylene (singlet) formed by the photolysis of ketene (313 nm) reacts with oxetan to yield 2-methyl- and 3-methyloxetans by insertion in the C-H bonds and probably also tetrahydrofuran.These products are formed chemically activated and undergo unimolecular decomposition unless collisionally stabilized.Using perfluoropropane as the bath gas, the results obtained with 2-methyloxetan have been interpreted using RRKM theory and a step-ladder model with a most probable step size of ca. 9 kJ mol-1.Using 206 nm radiation yields methylene with excess energy, some of which is still present when it reacts, and results in the production of 2-methyloxetan with an average lifetime approximately one-half that of the energised molecule produced when 313 nm radiation is used.Similarly methylene reacts with 3,3-dimethyloxetan to yield chemically activated 3-ethyl-3-methyloxetan and 2,3,3-trimethyloxetan.A third compound tentatively identified as 3,3-dimethyltetrahydrofuran is also formed.The decomposition of these 3 molecules has been followed and in the case of the ethylmethyloxetan the average energy transferred in collision with 3,3-dimethyloxetan has been found to be ca. 6.5 kJ mol-1.Some deductions can be made about the Arrhenius parameters for the thermal decomposition of the (as yet unreported) trimethyloxetan and the dimethyltetrahydrofuran.
View MoreZibo Xiaoguang Chemical Material Co., Ltd
Contact:15954099116
Address:Boshan Development Zone
TAIZHOU XINGCHENG CHEMPHARM CO.,LTD.
Contact:0086-0576-88551200,88886292 ,88880039
Address:B Area. 10 Floor.Yaodadasha. 289#.Shifu Road.Taizhou.Zhejiang.China
Qingdao Xinnuo pharmaceutical Chemical Co.,Ltd
Contact:86-186-15688656
Address:50 Meters North To YuanHou Community Committee,Xifuzhen Subdistrict,Chengyang District,Qingdao
Henan Sinotech Import&Export Corporation
website:http://www.hasinotech.com
Contact:86-371-86181678
Address:No. 260, Dongming Road,Jinshui District
Contact:+86-20-32051076
Address:1105,Building A, International Business Incubator,Science City
Doi:10.1016/0040-4039(95)02228-7
(1996)Doi:10.1246/bcsj.45.834
(1972)Doi:10.1016/S0040-4020(01)93556-2
(1972)Doi:10.1021/jo015704l
(2001)Doi:10.1016/S0040-4020(01)00448-3
(2001)Doi:10.1002/chem.201805200
(2019)
