Meisenheimer complex
（重定向自Zimmermann reaction）
![](/Images/godic/202502/22/MeisenheimerComplex0742.png")
![](/Images/godic/202502/22/MeisenHeimerWhelandComplex0742.png")
![](/Images/godic/202502/22/ZimmermannReaction0742.png")
A Meisenheimer complex or Jackson–Meisenheimer complex in organic chemistry is a 1:1 reaction adduct between an arene carrying electron withdrawing groups and nucleophile. These complexes are found as reactive intermediates in nucleophilic aromatic substitution but stable and isolated Meisenheimer salts are also known.