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Shanxi Pacific Chemical Import & Export Co., Ltd.
China Manufacturer with main products: Sodium Hydroxide, Carbon Black, Potassium Permanganate, Calcium Ammonium Nitrate |
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Specifications
Appearance: Colorless or slightly yellow liquid with odor.
Melting point: -41.6 Boiling Point: 115.3 Relative density (water = 1): 0.9827 Refractive index: 1.5067Relative vapor density (air = 1): 2.73 Vapor Pressure (kPa): 1.33/13.2
Flash point: 17 ignition temperature: 482 upper explosive limit% (V / V): 12.4 explosive limit% (V / V): 1.7
Solubility: Soluble in water, alcohol, ether, etc. Most organic solvents. Pyridine and water miscible at any ratio, while most of polar and non polar dissolved organic compounds, or even dissolve some inorganic salts. Therefore, pyridine is a solvent widely used value. Pyridine molecules in addition to the reasons for high water-soluble polar molecule with a large, but also because the pyridine nitrogen atom is not shared electron pair can form hydrogen bonds with water. Alkyl pyridine structure of organic molecules it has considerable affinity, so it can dissolve polar and non polar organic compounds. And nitrogen atoms on the electron pair can not share with some metal ions such as AG, Ni, Cu, etc. To form complexes, which results in it can dissolve inorganic salts. Azeotropic mixture with water, the boiling point of 92 ~ 93. (The nature of the industrial use of the purified pyridine. )
Spectral properties:
(1) pyridine infrared spectroscopy (IR): IR spectra of aromatic heterocyclic compounds and benzene compounds similar to the 3070 ~ 3020cm-1 C-H stretching Department has vibration, in the 1600 ~ 1500cm-1 and aromatic ring stretching vibration (skeleton bands), in 900 ~ 700cm-1 Department has aromatic plane bending vibration of hydrogen.
(2) pyridine H NMR (HNMR): Pyridine and benzene ring proton chemical shifts of H (δ 7.27) than in the low field chemical shift is greater than 7.27, which with the adjacent carbon atoms on the mixed hydrogen The absorption peak is more biased towards low field. When you have connected the electron donor heterocyclic groups, the chemical shifts move to high field, as the suction power of substitution, then the chemical shift to low field mobility.
(3) UV absorption spectrum of pyridine (UV): UV spectrum of pyridine has two absorption bands, one at 240 ~ 260nm, corresponding to the transition (similar to benzene). Another area in 270nm, corresponding
(1) pyridine infrared spectroscopy (IR): IR spectra of aromatic heterocyclic compounds and benzene compounds similar to the 3070 ~ 3020cm-1 C-H stretching Department has vibration, in the 1600 ~ 1500cm-1 and aromatic ring stretching vibration (skeleton bands), in 900 ~ 700cm-1 Department has aromatic plane bending vibration of hydrogen.
(2) pyridine H NMR (HNMR): Pyridine and benzene ring proton chemical shifts of H (δ 7.27) than in the low field chemical shift is greater than 7.27, which with the adjacent carbon atoms on the mixed hydrogen The absorption peak is more biased towards low field. When you have connected the electron donor heterocyclic groups, the chemical shifts move to high field, as the suction power of substitution, then the chemical shift to low field mobility.
(3) UV absorption spectrum of pyridine (UV): UV spectrum of pyridine has two absorption bands, one at 240 ~ 260nm, corresponding to the transition (similar to benzene). Another area in 270nm, corresponding
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