The 13C NMR spectrum (Supplementary Figure S2) of 1 aided by HMQC, revealed one carbonyl group (δC 201.0), five sp2 methine carbons (δC 131.9, 131.2, 122.8, 114.6 and 110.1), and seven other sp2 quaternary carbon atoms (δC 155.7, 154.5, 144.6, 134.8, 131.9, 125.0 and 125.1). ...
The first high-resolution gas-phase spectrum of an arenium ion shows that the σ complex (not the π complex; see picture) is the most stable structure of C6H7+.关键词: arenium ions aromatic substitution carbocations IR spectroscopy reactive intermediates DOI: 10.1002/1521-3773(20021004...
aThis is supported by the IR spectrum, in which bands corresponding to alkyl C–H stretching at ~ 3000 cm and Si–OR stretching at~ 1080 cmcan be observed 红外光谱支持这,对应于烷基C-H的带舒展在~ 3000 cm和Si或舒展at~ 1080 cmcan被观察 [translate] ...
On the basis of an anharmonic potential CCSD(T)-F 12 /aug-cc-pVTZ and the use of a pure variational method (VCI) the IR spectrum of HC 3 N was calculated between 200 and 4800cm 1 . These calculations make it possible, on the basis of the positioning of the bands and the ...
Organophotocatalyzed C(sp2)–H arylation The efficiency of organic dyes as a photosensitizer to replace expensive Ru and Ir photocatalysts has been adopted by the synthetic community as well as industry for years. Organophotocatalyst provides cost-effective option for SET reactions, however, due to ...
分类号:0627密级:单位代码:10422学号:如(7忻l午∥户第只番SHANDONGUNIVERSlTY博士学位论文Dissertation.forDoctoralDegree论文题目:袱.j{;夫碱佛豸.一寸eF键军口C—H键邰选择ll生浩化和劢角色化。3巴蛐比Ach呲记订04 ‰咖眦b勘九对C一尸/C—H||;on良伽F‰nn姒5涮彳陆巳作者姓名**单位专业名称指导教师...
In Figure 11, the Raman spectrum of a-C:H coatings are shown, in which the films are treated with different deposition parameters after the potentiostatic corrosion. The G peak position shifted toward a higher wavenumber and the sp3 C ratio increased com- pared with the Raman analysis before ...
This coupling between Csp2-H (in the uracil ring) and Csp3-H (in the side chain) bonds was not, however, successful when R2 = H. The authors suggested that coupling most probably involved single electron transfer (SET) processes and might require a more stable tertiary radical on the ...
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