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Is SiH2Cl2 nonpolar and why?

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takenotes | Student, Grade 9 | Honors

Posted June 29, 2012 at 9:35 PM via web

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Is SiH2Cl2 nonpolar and why?

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sanjeetmanna | College Teacher | (Level 3) Assistant Educator

Posted June 30, 2012 at 11:53 AM (Answer #1)

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It is Dichlorosilane 

The molecule is polar since the electronegative difference between Si-Cl is larger than that of the electronegative difference between Si-H.

Electronegativity is the tendency of the atom or element to pull the electron towards it self which will result in the polarity of the molecule which will form polar covalent bond.

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jerichorayel | College Teacher | (Level 1) Senior Educator

Posted June 29, 2012 at 11:22 PM (Answer #2)

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SiH2Cl2 -> Dichlorosilane is a (slightly) polar molecule.

shape: tetrahedral

the Chlorine's lone pair and its electronegativity make the compound a polar molecule. 

Electronegative difference

C-Cl = 3.16 - 2.55 = 0.61

Cl-H = 2.55-2.1 = 0.4

there's a net charge going to Cl that makes the compound slightly to very lightly polar.

 

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