Collidine

from Wikipedia, the free encyclopedia

In chemistry , the collidines (sometimes also collidines ) or trimethylpyridines form a group of organic compounds that belong to the heterocycles (more precisely: heteroaromatic compounds ). They consist of a pyridine ring that is substituted with three methyl groups. Their different arrangement results in six constitutional isomers with the empirical formula C 8 H 11 N. The 2,4,6-collidine is the best-known isomer.

properties

The collidines are colorless liquids with a pyridine-like odor. They are soluble in water and ethanol .

Collidine
Surname 2,3,4-collidine 2,3,5-collidine 2,3,6-collidine 2,4,5-collidine 2,4,6-collidine 3,4,5-collidine
other names 2,3,4-trimethylpyridine
  		2,3,5-trimethylpyridine
  		2,3,6-trimethylpyridine
  		2,4,5-trimethylpyridine
  		2,4,6-trimethylpyridine,
sym- collidine 		3,4,5-trimethylpyridine
 
Structural formula Structure of 2,3,4-collidine Structure of 2,3,5-collidine Structure of 2,3,6-collidine Structure of 2,4,5-collidine Structure of 2,4,6-collidine Structure of 3,4,5-collidine
CAS number 2233-29-6 695-98-7 1462-84-6 1122-39-0 108-75-8 20579-43-5
PubChem 16691 12759 15100 14280 7953 88601
Molecular formula C 8 H 11 N
Molar mass 121.18 g mol −1
Physical state liquid
Brief description colorless liquids with a pyridine-like odor
Melting point −43 ° C
boiling point 192-193 ° C 184 ° C 176-178 ° C 165-168 ° C 171-172 ° C
pK s value (25 ° C)
(of the conjugate
acid BH + ) 		7.43
solubility 35 g l −1
GHS
labeling
no classification available
07 - Warning
Caution
no classification available
no classification available
02 - Highly / extremely flammable 06 - Toxic or very toxic
danger
no classification available
H and P phrases see above 315-319-335 see above see above 226-302-311-315-319-332-335 see above
see above no EUH phrases see above see above no EUH phrases see above
see above 261-305 + 351 + 338 see above see above 261-280-305 + 351 + 338-312 see above

See also

Individual evidence

  1. ↑ Entry on Kollidin. In: Römpp Online . Georg Thieme Verlag, accessed on November 25, 2014.
  2. ↑ a b c d Entry on 2,4,6-trimethylpyridine in the GESTIS substance database of the IFA , accessed on April 20, 2017(JavaScript required) .
  3. ↑ a b c d e Zvi Rappoport: CRC Handbook of Tables for Organic Compound Identification , Third Edition, CRC Press, Boca Raton, Florida, 1984, ISBN 0-8493-0303-6 .
  4. ↑ Data sheet 2,3,5-Collidine from Sigma-Aldrich , accessed on April 20, 2017 ( PDF ).

Web links

Commons : Collidine  - collection of pictures, videos and audio files