Reasoning Question Series :
Q.34: Why SiH4 bond length is less than SiF4 bond length.?
Ans:
#1. First All we wil Know that Bond length
bond length or bond distance is the average distance between nuclei of two bonded atoms in a molecule.
#2.As we Know That both are Sp3 Hybridized.
but bond length depend upon the forces of attraction between Two Atoms.
as number of share electron increases , Bond length decreases.
#3. Due to electronegaive difference between the Si and Hydrogen,
Si and H have lower electronegative difference : Silicon has 1.9 and Hydrogen is 2.1.
while Si and F have higher Electronegative difference .
3. Thats why Si attracts Four Hydrogen strongly Than Flourine.
then SiH4 Bond Length is less than SiF6 Bond Length.
.if u know another reason .plz comment Below
Regards
Malik Xufyan
there is more electronegativity difference between SiF4 then it should have short bond length than SiH4
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