Bond angles phenol

Alcohols and phenols have nearly the same geometry around the oxygen atom as water. The R-O—H bond angle has an approximately tetrahedral value (109° in methanol, for example), and the oxygen atom is sp3-hybridized. 

Fig. 8. Tyrosine coordination modes in galactose oxidase-copper complex. Tyrosine phenolate bond angles (0) and ring torsion angles (t) are indicated. (Based on protein coordinates PDB ID IGOG.)...

Indeed, this is a better view. The structure of water was discussed in Section 8-9. The hydroxyl group in an alcohol or a phenol is covalently bonded to a carbon atom, but the O—H bond is quite polar. The oxygen atom has two unshared electron pairs, and the C—O—H bond angle is nearly 104.5°. 

TABLE 1. Phenol geometry. Bond lengths in A, bond angles in deg... 

FIGURE 10. The keto tautomeric form of phenol viewed at the B3LYP/6-31-FG(d,p) computational level. Bond lengths in A, bond angles in degrees... 

TABLE 5. Comparison of the average bond length (A) and bond angle (deg) at the hydroxyl group in nitro-substituted phenols (the notation is given in 42)... 

As expected, substituents at the o-position will affect the bond angles. Therefore, a2 in both o-chlorophenols and o-bromophenols is larger than in the p-substituted phenols. The other bond angles are adjusted accordingly. 

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