Halogen Derivatives Physical Properties

Halogen Derivatives Physical Properties

Halogen Derivatives Physical Properties :

→ Alkyl halides arc although polar in naurc, these are inoiuble in water but soluble in organic solvents. Their insolubility ni water ta due to their inability Lo form hydrogen bonds with water molecules or to break the hydrogen bonds already existing in water molecules.

Halogen Derivatives Physical Properties

→ Their densities decrease in the following order:

Iodide > Bromide > Chloride > Fluoride

→ Alkyl bromides and iodides arc generally heavier than water, wherea6 chlorides and fluorides are lighter. Methyl iodide is the densest alkyl halide as in this compound contribution of iodine density is maximum relative to the contribution of hydrarbon pail.

→ Boiling pointa of alkyl halides follow the following order:

Iodide > Bromide > Chloride > Fluoride

Among isomerac halides, the boiling point decreases as 1° > 2° > 3°.

Halogen Derivatives Physical Properties

→ Boiling points of chlorlllated derivatives of an alkane increase with number olCI atoms because of an increase in the induced dipole-induced dipole attractive forces.

Stability order of alkyl halides is RF > RC > RBr > RI.

→ Alkyl iodides, on standing become violet or brown because of their decomposition in presence of light to give iodine.

Halogen Derivatives Physical Properties 1

Chemistry Notes