POCl3 is a covalent molecule. It is composed of nonmetal atoms (phosphorus, oxygen, and chlorine) that share electrons to form covalent bonds.
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POCl3 is a covalent compound. It is formed by sharing electrons between phosphorus, oxygen, and chlorine atoms, resulting in a molecule with covalent bonds.
Phosphorus trichloride (POCl3) has one lone pair of electrons on the phosphorus atom.
The bond angle in POCl3 is approximately 107 degrees. This can be explained by the molecule's structure, which is trigonal pyramidal with one lone pair of electrons on the central phosphorus atom, causing some compression of the bond angles.
http://actachemscand.dk/pdf/acta_vol_13_p0190-0191.pdf The file above indicates that POCl3 has a dipole moment and hence will be polar. The O atom is more electronegative than Cl (by only a little bit), and will have more electron density than the Cl atom, hence the polar nature. Is it very polar in nature, not really, but it is polar.
In POCl3, oxygen typically has an oxidation number of -2, and there are three oxygen atoms, giving a total oxidation number of -6. Since the overall charge of the molecule is neutral, the sum of the oxidation numbers must equal zero. Therefore, the oxidation number of phosphorus in POCl3 is +3.