Home > Organic Chemistry > Electronegativity and Shielding

How do you calculate shielding effect?

Answer 1

I think that if you ask this on the basis of #"NMR spectroscopy"# you should consult a text.....

Failing this, look up this site. In general, electronegative elements deshield the protons, aryl rings exhibit anisotropy due to the mobility of #pi"-electrons"#.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Paisley Boney

The shielding effect can be calculated using the formula:

Shielding effect = Zeff = Z - σ

Where:

Zeff is the effective nuclear charge,
Z is the atomic number (number of protons),
σ is the shielding constant.

The shielding constant σ is an empirical value that depends on the electron configuration of the atom. It generally increases with the distance of the electron from the nucleus and with the presence of other electrons between the nucleus and the electron in question.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.