5-Chloro-2,3-difluoropyridine
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5-Chloro-2,3-difluoropyridine
structure -
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CAS No:
89402-43-7
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Formula:
C5H2ClF2N
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Chemical Name:
5-Chloro-2,3-difluoropyridine
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Synonyms:
Pyridine,5-chloro-2,3-difluoro-;5-Chloro-2,3-difluoropyridine;2,3-Difluoro-5-chloropyridine;3-Chloro-5,6-difluoropyridine
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CAS No:
Characteristics
12.9
2
Colourless liquid
1.5±0.1 g/cm3
47-49ºC
70-73 °C @ Press: 85 Torr
39.9±25.9 °C
1.479
Safety Information
Ⅲ
1993
3
3
S23-S36-S61
Xi,Xn
P273
H226-H302-H412
|Warning|H226: Flammable liquid and vapor [Warning Flammable liquids]|P210, P233, P240, P241, P242, P243, P264, P270, P273, P280, P301+P312, P303+P361+P353, P330, P370+P378, P403+P235, and P501|H226 (100%): Flammable liquid and vapor [Warning Flammable liquids]|Aggregated GHS information provided by 232 companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|Aggregated GHS information provided by 3 companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
5-Chloro-2,3-difluoropyridine Use and Manufacturing
400 g of sulfolane and 400 g of dimethylsulfoxide were weighed into a 1000 mL flask and dehydrated to a temperature of less than 0.05percent at 200 ° C under a pressure of 0.07 MPa (negative pressure)96 g (1.66 mol) of cesium fluoride, 96 g (1.66 mol) of potassium fluoride, 120 g (0.67 mol) of trichloropyridine, 2 g of 18-crown ether and 3 g of potassium carbonate were weighed into a reaction flask at 120 ° C and heated to 200 ° C The product was collected in about 3 hours. 95 g (0.51 mol) of the product was obtained in 90percent yield. The purity was 96.8percent as determined by gas chromatography.(c) (c)
5-Chloro-2,3-difluoropyridine is a 2,3,5-trihalopyridine used in the preparation of the herbicides and pesticides such as chodinafop-propargyl.
Computed Properties
Molecular Weight:149.52
XLogP3:2
Hydrogen Bond Acceptor Count:3
Exact Mass:148.9843831
Monoisotopic Mass:148.9843831
Topological Polar Surface Area:12.9
Heavy Atom Count:9
Complexity:101
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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