Why is phenol more polar?
A polar molecule has a net dipole as a result of the opposing charges (i.e. having partial positive and partial negative charges) from polar bonds arranged asymmetrically. (Wikipedia)
So, C-H bonds are not considered as polar.Hence the ethyl group is almost non-polar. But, it is the O-H bond that causes polarity to the ethanol molecule. In O-H bond, O atom is in sp3 hybridized state and the geometry of orbitals around O atom is tetrahedral, with two vertices occupied by lone pairs of electrons.
Is phenol polar or nonpolar? Question = Is phenol polar or nonpolar? Answer = phenol ( C6H5OH ) is Polar. What is polar and non-polar? Polar. “In chemistry, polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole or multipole moment.
Appearance At ambient temperatures it is a hygroscopic crystal, white when pure, pink or red with impurities present. When in a molten state it is a colorless mobile liquid. Phenol darkens on exposure to light. Miscibility with water Crystals are hygroscopic but not very soluble.
Examples of phenolic compounds. All carbon atoms forming aromatic ring are sp2 hybridized. Therefore, phenyl has hexagonal planar structure with all bond angles 120° and delocalized π-electrons distributed over the ring.
In case of benzene, it is a non polar molecule because it contains only C-H and C-C bonds. Since carbon is slightly more electronegative than H , a C-H bond is very slightly polar and has a very small dipole moment. Hence overall it has no dipole moment, hence benzene is nonpolar.
Phenol (also called carbolic acid) is an aromatic organic compound with the molecular formula C6H5OH. It is a white crystalline solid that is volatile.
Phenol is more polar than Alcohol. O—H bond in phenols is more polar than in alcohol. In phenols electron pair at O moves towards the conjugated benzene ring and shows resonance. Due to resonance there is permanent separation of charge hence more polarity than alkohol.
Phenol has a good solubility in water (8.2 g/100 mL) that results from hydrogen bonds between water and phenol molecules. In addition, the hydrophobic interactions are weak due to low hydrophobicity of phenol.
Benzene is nonpolar because it is a symmetrical molecule in which all the bond dipoles cancel.
Generally, methanol, ethanol or water works for me (phenolic acids, flavonoids). Some phenolics (tocopherols are an example) are non-polar and would be better extracted with ethyl acetate, hexanes, or similar non-polar solvent.
Phenol is more polar than ethanol. The O-H bond in phenol is more polar than the O-H bond in ethanol. In phenol, electron pair at O moves towards the conjugated benzene ring and shows resonance. Due to this resonance, the polarity of the O-H bond increases.