For certain compounds, the listed chemical shift pertains to the F shown in bold. The primary references for these values are: 1) the 1991 Bruker Almanac, and 2) Compilation of reported F19 NMR chemical shifts, 1951 to mid-1967 by Claude H. Dungan and John R. Van Wazer.

1983年1月1日 · PF5 generates the species PF6 -HPO2F2 and HF (with some H2PO3F present as a minor product). HPO2F2 gives rise to H2PO3F and HF (with smaller amounts of PF6 - also present). The 31P NMR spectrum of P40,0 in HDA exhibits four resonances assigned to P(OH)4 +H4P207, (HPO3)4 and a mixture of cyclic and branched phosphoric acids, respectively.

F3最高场且变化范围大, 高场可达-220ppm, 碳上连接金属 原子时较高场, 连接卤素和氧原子时稍低; F1低场. 当双 键上只有一个氟时化学位移变化更大, 低场可达-53ppm. 规律性较差, 分析谱图时尽可能与类似结构的谱图比较. f2. 少氟取代的芳香族化合物. fff峰编号 （ppm） 1. 2. -119.5 -123.0. 3. 4. 5. 6. 7. ff1. 多氟取代的芳香族化合物. NMR有机氟谱-N (CF3)2 18.1 62.9F Cl F ClHJFF = 67.3 + 64.5 = 131.8 (Hz)F FJFF = 18.8 - 7.9 = 10.9 (Hz)H⑶ 复杂含氟烯烃尽量利用已知的结构数据信 …

Berry pseudorotation influences the 19 F NMR spectrum of PF 5 since NMR spectroscopy operates on a millisecond timescale. Electron diffraction and X-ray crystallography do not detect this effect as the solid state structures are, relative to a molecule in solution, static and can not undergo the necessary changes in atomic position.

Chemistry in fuming nitric acids—I. NMR spectroscopic study of PF5, HPO2F2 and P4O10 in the solvent system 44 wt.% N2O4 in 100% HNO3. Polyhedron 1983 , 2 (7) , 651-656.

2006年2月6日 · Fluxional effects in PF 5 can be included using ab initio molecular dynamics for the theoretical determination of 19 F NMR parameters that are in agreement with experiment. The picture shows the average shielding constants of all fluorine 19 F atoms over a series of 10 000 snapshots obtained by ab initio molecular dynamics simulations performed ...

2006年2月13日 · For the first time, theoretical evidence that confirms the importance of the Berry pseudorotation process in the interpretation of the 19F NMR spectrum of phosphorus pentafluoride (PF5) is presented. Ab initio molecular dynamics simulations have been performed to generate a large number of configura …

19 F NMR spectroscopy of the PF 5 /3-oxabicyclo [3.2.2]nonane system. Giulio Ceccarelli, Giulio Ceccarelli. Istituto di Chimica Fisica, Università di Pisa, Via Risorgimento 35, 56100 Pisa, Italy. Search for more papers by this author. Fulvio Andruzzi, Corresponding Author. Fulvio Andruzzi.

1983年1月1日 · 31 P and 19 F NMR spectroscopy has been used to elucidate the nature of the interaction of PF 5, HPO 2 F 2 and P 4 O 10 with the solvent system 44 wt.% N 2 O 4 in 100% HNO 3 (“High Density Acid”, HDA). PF 5 generates the species PF 6 −, HPO 2 F 2 and HF (with some H 2 PO 3 F present as a minor product).

五氟化磷，是一种磷卤化合物，化学式为pf5。 磷原子的氧化数为+5，包含有一个三中心四电子键，常温常压下为无色有刺激性恶臭味的气体，主要用作聚合反应催化剂。