Wavelength‐dependent photochemistry of 1‐phenyl‐1‐diazopropane
Wavelength‐dependent photochemistry of 1‐phenyl‐1‐diazopropane
复制标题
1-苯基-1-重氮丙烷的波长依赖性光化学
DOI:
10.1002/poc.4298
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发表时间:
2021
影响因子:
1.8
通讯作者:
Platz, Matthew S.
中科院分区:
文献类型:
--
作者:
Tokihiro, Jodie;Fitzpatrick, Caralyn;Platz, Matthew S.
1‐Phenyl‐1‐diazopropane (PDP) was photolyzed in acetonitrile/methanol mixtures using either 520‐nm light or 350‐nm light. The main photoproducts were 1‐methoxypropylbenzene andE,Z‐1‐phenylpropene. With 520‐nm light, a plot of (1‐methoxypropylbenzene)/(E,Z‐1‐phenylpropene) versus methanol concentration was linear. These results are consistent with the visible light induced fragmentation ofPDPto dinitrogen and closed shell singlet (S0) ethyl, phenylcarbene (1EPC) which partitions between 1,2 hydrogen migration to form alkene, and reaction with methanol to form ether. The same plot generated with 350‐nm light significantly deviates from linearity. It is proposed that 350‐nm light generates the carbene in a vibrationally excited, open shell S1excited state (1EPC*). This state rearranges toE,Z‐1‐phenylpropenes in competition with relaxation to ground state1EPCover a few tens of ps. As a result, methanol cannot completely suppress alkene formation upon photolysis ofPDPwith 350‐nm light. The carbene excited state is a “non‐trappable carbene” route to alkenes.
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DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
H. Frey
通讯作者:
H. Frey
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
R. Moss;D. C. Merrer
通讯作者:
D. C. Merrer
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
B. Bigot;R. Ponec;A. Sevin;A. Devaquet
通讯作者:
A. Devaquet
DOI:
--
发表时间:
1965
期刊:
影响因子:
--
作者:
H. Frey;I. Stevens
通讯作者:
I. Stevens
影响因子:
3.6
作者:
Bernardi, F;Olivucci, M;Soto, J
通讯作者:
Soto, J