Register to reply

Why the bond angle of methane is 109 instead of 90?

by scientist91
Tags: angle, bond, methane
Share this thread:
scientist91
#1
Apr30-07, 08:52 AM
P: 133
I know that the sp3 hybrid orbitals form 109 angle, but why the angle is not 90. If the angle is 109 the repulsion is minimized or what? Show some comparations. Thank u.
Phys.Org News Partner Chemistry news on Phys.org
Building the ideal rest stop for protons
Direct reaction heavy atoms to catalyst surface demonstrated
Cagey material acts as alcohol factory
sicjeff
#2
Apr30-07, 09:27 AM
P: 46
I believe your problem lies in the fact that you are only looking in two dimensions. What orbital theory are you using? Valence shell theory is useless for all practical applications anyway.
Andronicus1717
#3
May2-07, 12:39 PM
P: 32
Indeed, in 3d space four points equally spaced around a center point form a tetrahedron, not a square, hence your bond angle of 109.5 degrees.

Kushal
#4
May3-07, 12:02 PM
P: 440
Why the bond angle of methane is 109 instead of 90?

methane consists of four bonded pairs, i.e 4 C-H bonds. So as to minimize repulsion, the molecule adopts a tetrahedral shape, hence bond angle becomes 109.5. with bond angle of 90, the molecule would not be very stable.


Register to reply

Related Discussions
Why the bond angle of water is 105 instead of 109? Chemistry 5
Bond Angle, Can Someone Tell Me if I'm Correct? Introductory Physics Homework 7
Bond Angle Chemistry 2
Bond Angle Introductory Physics Homework 1