• P (EN = 2.1) is much less electronegative than chlorine (EN = 3.0) so P is the central atom.

You are watching: Is pcl5 polar or nonpolar molecule

Group Valence ElectronsP 5A 1 × 5 e– = 5 e–Cl 7A 5 × 7 e– = 35 e–Total: 40 valence e–

The Lewis structure is:

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The electronegativity distinction in between P and Cl is 0.9 so the C–Cl bond is nonpolar. Recall that dipole arrows point in the direction of the more electronegative atom.


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The molecule PCl5 is oboffered not to have a dipole moment. This is because:

A. There are no lone pairs of electrons on the main atom

B. As a gas and liquidPCl5 is not a ionic, but fairly the bonds are covalent

C. The polarity of the P-Cl bonds cancel out as a result of the geomeattempt of the molecule.

D. Tbelow are 2 lone pairs of electrons on the central atom, but because of the repulsion, they are on oppowebsite sides of the central atom and also cancel out.

E. P and Cl are ciose in the routine table, so they have very similar electronegatives, and as such, the P-Cl bonds are not polar.


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