Fluornitrobenzole - Fluornitrobenzole

Fluornitrobenzole
Name 2-Fluornitrobenzene 3-Fluornitrobenzene 4-Fluornitrobenzene
other names o -Fluornitrobenzene m-Fluornitrobenzol p-Fluornitrobenzol
Structural formula Structure of 2-fluoronitrobenzene Structure of 3-fluoronitrobenzene Structure of 4-fluoronitrobenzene
CAS number 1493-27-2 402-67-5 350-46-9
PubChem 73895 9823 9590
Sum formula C 6 H 4 FNO 2
Molar mass 141.10 g · mol −1
Physical state liquid
Melting point −8 °C[1] 2 °C[1] 22–24 °C[1]
boiling point 215 °C[1] 204–206 °C[1] 204–206 °C[1]
GHS
marking
07 - Warning
Caution [2]
06 - Toxic or very toxic 08 - Dangerous to health
Danger [3]
06 - Toxic or very toxic 08 - Dangerous to health
Danger [4]
H and P phrases 315​‐​319​‐​335 301​‐​311​‐​331​‐​373 302​‐​312​‐​331​‐​373
no EUH statements no EUH statements no EUH statements
261​‐​305+351+338 261​‐​280​‐​301+310​‐​311 261​‐​280​‐​311

In chemistry, fluoronitrobenzenes form a group of substances that are derived from both nitrobenzene and fluorobenzene . The structure consists of a benzene ring with attached nitro group (–NO 2 ) and fluorine (–F) as substituents . Their different arrangement results in three constitutional isomers with the empirical formula C 6 H 4 FNO 2 .

characteristics

The p -fluoronitrobenzene, which has the highest symmetry, has the highest melting point. The introduction of the fluorine atom changes the boiling point only slightly compared to nitrobenzene (211 ° C [5] ).

Individual evidence

  1. a b c d e f Alfa-Aesar-Katalog 2008/09, S. 1153.
  2. Data sheet 1-Fluoro-2-nitrobenzene from Sigma-Aldrich , accessed on May 3, 2011 ( PDF ).
  3. Data sheet 1-Fluoro-3-nitrobenzene from Sigma-Aldrich , accessed on October 16, 2016 ( PDF ).
  4. Data sheet 1-Fluoro-4-nitrobenzene from Sigma-Aldrich , accessed on October 16, 2016 ( PDF ).
  5. Entry on nitrobenzene in the GESTIS substance database of the IFA , accessed on December 27, 2014(JavaScript required) .