84629-40-3

Upstream product

• 4761-00-6 2,4,6-trimethylbenzylbromide 
• 54783-53-8 2-lithio-5-methylfuran 
• 108-67-8 1,3,5-trimethyl-benzene 

Downstream Products

• 84629-43-6 1,3-Dimethyl-2-(2,4,6-trimethylphenyl)-2-cyclopenten-1-ol 
• 84629-42-5 3-Methyl-2-(2,4,6-trimethylphenyl)-2-cyclopenten-1-on 
• 84629-44-7 1,3-dimethyl-2-(2,4,6-trimethylphenyl)-1,3-cyclopentadiene 
• 84629-41-4 1-(2,4,6-trimethylphenyl)hexane-2,5-dione 

Relevant academic research and scientific papers

Anisotropy Effects of Conjugated Cyclic Systems, V. 1H NMR Spectra of Mesityl Substituted Aromatic 6? Systems

1,3-Dimethyl-2-mesitylcyclopentadiene (5) has been synthesized in two routes.The 1H NMR spectrum of the cyclopentadienyl anion 3 shows a difference of chemical shift values of the p- and o-methyl groups of Δδ = 0,25 ppm.Compared with bimesityl (2b) (Δδ = 0,47 ppm) and the tropylium ion 1 (Δδ = 0,56 ppm) this is a small Δδ value.This is interpreted by the influence of the ? electron density from the five-membered anion ring on the methyl groups through space.In the range 1 to 3 there is found a linear relationship for this influence.X-ray analysis of the ferrocene derivative 18 prepared from 3 confirms the perpendicular orientation of the mesityl and cyclopentadienyl rings.