At 25 °C pyridine has a viscosity of 0.88 mPa/s and thermal conductivity of 0.166 W·m−1·K−1. 766-11-0, formula is C5H3BrFN, Name is 5-Bromo-2-fluoropyridine. The enthalpy of vaporization is 35.09 kJ·mol−1 at the boiling point and normal pressure.The enthalpy of fusion is 8.28 kJ·mol−1 at the melting point. Recommanded Product: 5-Bromo-2-fluoropyridine.
Wu, Xue-ke;Zhang, Song;Liang, Dong-mei research published 《 Influence of external electric field on the molecular structure and electronic spectrum of 2-fluoro-5-bromopyridine molecule》, the research content is summarized as follows. The B3LYP method of d. functional theory (DFT) at 6 -311 + + g(3df, 3pd) level is used to calculate the geometrical parameters, dipole moments and total energies of the ground state of 2-fluoro 5-bromopyridine mol. under different external elec. fields in this paper. On the basis of this, the single-excitation CI (CIS) is used to study the influences of external elec. field on the excited wavelengths and oscillators of the first nine excited states. The results show that the bond lengths (5C-9Br, 3C-10F) will be greatest impact by X axial elec. field, and with the continue increase of elec. field, they may be the first to break. When the external elec. field F =0.005 a. u., the total energy is maximum, and the dipole moment is minimized. The LUMO energy levels are greatly influenced by external elec. field, but the HOMO energy levels are less affected by the external elec. field. The excited wavelength and oscillator are influenced by elec. field, but their changes with the elec. field are relatively complex.
Recommanded Product: 5-Bromo-2-fluoropyridine, 5-Bromo-2-fluoropyridine is a useful research compound. Its molecular formula is C5H3BrFN and its molecular weight is 175.99 g/mol. The purity is usually 95%.
5-Bromo-2-fluoropyridine is a boronic acid that has been shown to react with iodides and form 5-bromo-2-fluoroiodobenzene. The reaction of 5-bromo-2-fluoropyridine with benzene gives the same product as the reaction with 1,3,5-trioxane. The UV absorption of 5-bromo-2-fluoropyridine is found at 230 nm and 260 nm. It also has an absorption band in the infrared region at 1625 cm−1. Vibrational progressions have been observed for this molecule, which are due to dipole moments and electron density distributions in the molecule.
5-bromo-2-fluoropyridine is used in the synthesis of heteroaromatic and aniline derivatives of piperidines as potent ligands used for vesicular acetylcholine transport. , 766-11-0.