Chloropyridines

Chloropyridines
Surname	2-chloropyridine	3-chloropyridine	4-chloropyridine
Structural formula
CAS number	109-09-1	626-60-8	626-61-9
PubChem	7977	12287	12288
ECHA InfoCard	100.003.316	100.009.960	100.009.961
Molecular formula	C 5 H 4 ClN
Molar mass	113.55 g mol −1
Physical state	liquid
Melting point	−46 ° C		−43.5 ° C
boiling point	166 ° C	148 ° C	147 ° C
GHS labeling	danger	Caution	no classification available
H and P phrases	302-310 + 330-315-318-373-410	302-315-319-335	see above
	no EUH phrases	no EUH phrases	see above
	260-280-302 + 352 + 310 304 + 340 + 310-305 + 351 + 338 + 310-403 + 233	280-301 + 330 + 331-302 + 352 304 + 340-312-337 + 313	see above

In chemistry, the chloropyridines form a group of organic compounds that belong to the heterocycles (more precisely: heteroaromatics ). They consist of a pyridine ring that is substituted with chlorine  (−Cl). Its different arrangement results in three constitutional isomers with the empirical formula C ₅ H ₄ ClN.

Individual evidence

1. ↑ ^{a b c} Entry on 2-chloropyridine in the GESTIS substance database of the IFA , accessed on December 26, 2019(JavaScript required) .
2. ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-112.
3. ↑ ^{a b} Entry on 3-chloropyridine in the GESTIS substance database of the IFA , accessed on December 26, 2019(JavaScript required) .
4. ↑ CWN Cumper, AI Vogel: Physical properties and chemical constitution. Part XXX. The dipole moments of some halogeno- and cyano-pyridines , in: J. Chem. Soc. , 1960 , pp. 4723-4728; doi : 10.1039 / JR9600004723 .