calculate the percentage ionic character of Si-H bond in SiH4. Pauling electronegativities of Si and H are 1.8 and 2.1 respectively
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Answer:
Explanation:
The difference in electronegativity for both bonds is approximately 0.3, but the
C-H
bond is considered to be nonpolar covalent, while the
Si-H
bond is considered to be polar covalent.
Because silicon is a larger atom than carbon, it will also have a larger electron cloud. This means that it has a greater polarizability than carbon does.
In the case of the
Si-H
bond, this will allow the more electronegative hydrogen to distort silicon's electron cloud and produce two partial charges, a positive one on the silicon and a negative one on the hydrogen.
As a result, the bond between silicon and hydrogen will indeed be considered polar covalent with a negative partial charge on the hydrogen atom.