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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: Gaba90 on December 30, 2020, 05:11:54 PM

Title: H NMR effect of halogens attached to benzene ring
Post by: Gaba90 on December 30, 2020, 05:11:54 PM

I understand halogens are ortho/para directors when attached to benzene ring. As a result do halogens have shielding effects on ortho and para protons and therefore decrease their chemical shifts?

Title: Re: H NMR effect of halogens attached to benzene ring
Post by: Babcock_Hall on December 30, 2020, 06:33:31 PM

The easiest way to answer this question is to look at the chemical shifts of hydrogen atoms in chlorobenzene and related molecules.