(1)麦氏重排(Mclafferty rearrangement) 分子离子或碎片离子结构中有双键,且在γ位上有H原子的正离子都能发生麦氏重排。在开裂中,γ位上的H通过六元环过渡态的迁移到电离的双键碳或杂原子上,同时烯丙键断裂,生成中性分子和碎片离子。 醛、酮、羧酸、酯、酰胺、碳酸酯、磷酸酯、肟、腙、烯、炔以及烷基苯等的含...
1 H NMR spectra of porphyrin dianionsNot Availabledoi:10.1007/BF00615444G. N. SinyakovA. M. Shul'gaG. P. GurinovichKluwer Academic Publishers-Plenum PublishersJournal of Applied Spectroscopy
a如果爱我,就一辈子吧 If loves me, for a lifetime[translate] a选好的奶粉 正在翻译,请等待...[translate] athis may overwrite sectors with data 这也许重写区段以数据[translate] a户口册 Registered permanent address book[translate] a1H NMR spectra 1H核磁共振光[translate]...
a对此的翻译是 正在翻译,请等待...[translate] a我希望通过努力,积极的工作态度能为您的公司服务 I hoped through diligently, the positive work manner can serve for yours company[translate] a1H-NMR spectra were measured on a 1H核磁共振的光谱在a被测量了[translate]...
a1H-NMR spectra were measured on a Bruker Avance 300 spectrometer operating at 300 MHz (DMSO-d6 solutions using TMS as internal reference) 1H核磁共振的光谱在经营在300兆赫(DMSO-d6的Bruker Avance 300分光仪被测量了解答使用TMS作为内部参考) [translate] ...
The 1H NMR spectra of the meso- and (±)-forms of some 1,4-disubstituted 2,3-diphenylbutanes were measured at 400 MHz. The spectral parameters were determined by iterative computer analysis, treating the protons as ABXX′A′B′ or (in some cases) A2XX′A2′ systems.DOI: 10.1002/omr...
During breath-hold maneuvers, a high-resolution MR spectroscopy sequence acquired MR spectra of 129Xe dissolved in the pulmonary tissue and plasma ... N Weatherley,N Stewart,H Chan,... - 《Thorax》 被引量: 0发表: 2018年 Metabolic and Molecular Imaging with Hyperpolarised Tracers Since ...
Chemical shifts (δ) in the 1H NMR spectra of free water and water adsorbed onto fumed silica, silicalite, and fumed silica/alumina were analyzed using ab initio calculations and experimental data. Nearly linear relationships between isotropic δH,iso values and the atomic charge of H (qH), th...
核磁共振氢谱(1HNuclearMagneticResonanceSpectra,1HNMR)核磁共振氢谱(1HNuclearMagneticR1影响化学位移的因素化学位移自旋耦合与裂分影响化学位移的因素 化学位移自旋耦合与裂分2化学位移电子屏蔽效应核磁共振氢谱图示化学位移化学位移电子屏蔽效应 核磁共振氢谱图示...
she's lonely 她这里知道一个小精灵。 但她有废弃物真正的朋友。 她是孤独的 [translate] a1H NMR spectra were registered on a Varian-300 instrument (300 MHz) in DMSO-d6, internal reference TMS. 1H核磁共振光在Varian-300仪器在 (DMSO-d6登记了) 300兆赫,内部参考TMS。 [translate] ...