This chapter focuses on Fluorine-19 nuclear magnetic resonance (NMR) Spectroscopy. All fluorine chemical shifts, reported in this chapter are relative to CFCl3 scales, are quoted as negative when the resonances are to lower frequency (higher field) of CFC13. From the temperature dependence of th...
Several series of the diadducts of titanium tetrafluoride were studied with high-resolution fluorine-19 nuclear magnetic resonance spectroscopy. These series ... Ragsdale, R. O 被引量: 0发表: 1969年 Study of fluorine in silicate glass with 19F nuclear magnetic resonance spectroscopy We report an ...
Short-cycle-time fluorine-19 CRAMPS 来自 Elsevier 喜欢 0 阅读量: 14 作者: P Jackson 摘要: Not Available DOI: 10.1016/0022-2364(90)90148-3 被引量: 6 年份: 1990 收藏 引用 批量引用 报错 分享 全部来源 免费下载 求助全文 Elsevier Elsevier (全网免费下载) dx.doi.org adsabs.harvard.edu ...
1) fluorine 19 reaction 氟19反应2) fluorination reaction 氟化反应 1. Arylamine diazotization, thermal decomposition, halogen exchange for aromatic fluoride preparation, four kinds of commonly used phase transfer catalysts crown ether, quaternary ammonium salt, tetraphenyl phosphonium salt, polyethylene ...
1) Fluorine-containing organic compound ~(19)F 含氟有机物2) Organofluorine compounds 含氟有机化合物 1. The application of organofluorine compounds has received extensive attention in the area of pharmaceutical industry, agrochemistry and materials science due to their unique chemical, physical ...
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At magic angle spinning speeds above 5 kHz, two major fluorine-19 resonances can be resolved in the acid form of the perfluorosulfonate ionomer Nafion (DuPont trademark). The larger signal at 120 ppm versus CFCl 3 is assigned to the backbone CF 2 groups and the second signal at 80 ppm ...
Barriers to internal rotation in CF3CFCl2, CF3CHCl2, CF3CF2Br, CF3CF2Cl, CF3CH2Br, and CF3CH2Cl: fluorine-19 and proton dynamic NMR studies; ab initio mole... Barriers to internal rotation in CF3CFCl2, CF3CHCl2, CF3CF2Br, CF3CF2Cl, CF3CH2Br, and CF3CH2Cl: fluorine-19 ...
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1) Fluorine nitrate 硝酸氟2) nitrate acid and hydrofluoric acid 硝酸-氢氟酸 例句>> 3) nitronium hexafluorophosphate 六氟磷酸硝4) nitronium hexafluoroantimonate 六氟锑酸硝5) nitronium tetrafluoroborate 四氟硼酸硝6) nitrosonium hexafluorophosphate 六氟磷酸亚硝补充资料:硝酸赤醇 ,四硝酸赤藓醇 药物...