Is SeCl2 polar or nonpolar? – Polarity of SeCl2
The question is –
Is SeCl2 polar or nonpolar?
⇒ SeCl2 is polar.
Selenium dichloride (SeCl2) is a polar molecule as the dipole moments of polar Se-Cl bonds do not get canceled equally in the asymmetrical bent or V-shape of the molecule.
SeCl2 consists of two Se-Cl bonds.
Each Se-Cl bond is polar as it consists of an electronegativity difference of 0.61 units between the single covalently bonded selenium (E.N = 2.55) and chlorine (E.N = 3.16) atoms.
Chlorine, being more electronegative, attracts the Se-Cl shared electron cloud towards itself to a greater extent.
Thus the central Se-atom gains a partial positive (δ+) charge while each of the two terminal Cl-atoms gains partial negative (δ–) charges.
Two lone pairs of electrons are present on the central Se-atom in SeCl2.
This leads to strong lone pair-lone pair and lone pair-bond pair electronic repulsions, thus distorting the overall shape and geometry of the molecule.
SeCl2 occupies a bent, angular, or V-shape, different from its ideal tetrahedral electron pair geometry.
The Se-Cl dipole moments do not get canceled in this asymmetric, bent shape. Thus SeCl2 is polar (net µ > 0).
Also, check –
⇒ How to identify polar or nonpolar compounds?
About the author
Vishal Goyal is the founder of Topblogtenz, a comprehensive resource for students seeking guidance and support in their chemistry studies. He holds a degree in B.Tech (Chemical Engineering) and has four years of experience as a chemistry tutor. The team at Topblogtenz includes experts like experienced researchers, professors, and educators, with the goal of making complex subjects like chemistry accessible and understandable for all. A passion for sharing knowledge and a love for chemistry and science drives the team behind the website. Let's connect through LinkedIn: https://www.linkedin.com/in/vishal-goyal-2926a122b/