How Is Bond Length Calculated?

[snickers1]

Can anyone explain to me how you calculate bond length?

Thanks!

 

[alxm]

I don't know what you had in mind, but the only way to do it theoretically is roughly:
1) Solve the molecular Schrödinger equation.
2) Calculate the derivatives with respect to nuclear coordinates to get the forces
3) Minimize using the steepest-descent or other minimization method
4) Repeat until the nuclei are at equilibrium bond distance.

 

[cantgetaname]

Assuming you meant how bond length data is obtained experimentally, it is done by spectroscopic methods.

One of probably many such techniques...
http://en.wikipedia.org/wiki/X-ray_crystallography