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occurred Jan 13, 2015 at 6:39

'Orbital' tag is useful as this question is focused on orbital interactions. 'Molecular orbital theory' is the logical conclusion to a complete answer for this question, but is not technically what the question was focused on.

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edited Jan 7, 2015 at 19:52

Yomen Atassi

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I fully understand and recognise the manner and which the series works.

I cannot find any references for the change in sigma donor capability moving up the series.

For example, comparing Cl-$\ce{Cl-}$ and NH3$\ce{NH3}$. Which of the two would be more a more willing sigma donor ?

Does this have something to do with how diffuse the orbitals are ?

'Orbital' tag is useful as this question is focused on orbital interactions. 'Molecular orbital theory' is the logical conclusion to a complete answer for this question, but is not technically what the question was focused on.

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