[Twickel]

Hi


Is the single bond formed between the metal and dinitrogen in end on bonding, due to sigma donation from dinitrogen or due to backbonding from the metal?


Thank you

[AWK]

http://en.wikipedia.org/wiki/Transition_metal_dinitrogen_complex

[Twickel]

Is side on bridging, which is dscribed in the link you gave me, the same as N2 forming a dihapto bond. Am I correct?

Dihapto (side on bridging) is formed when pi backbonding  from the metal atom increases ( maybe because of the nature of the other ligands the metal is bound to)

Please see attached file.

[AWK]

https://www.ionicviper.org/system/files/sideon.ppt
pubs.acs.org/doi/abs/10.1021/ja00060a028

[Twickel]

OK, a lot of examples in that link, does not explain the bonding.

Anyway, side on bridging: Is when one N2 pi orbital forms a bond with one metal and then a second metal 90 degrees to the first metal forms another bond with the N2 because N2 has another i orbital perpendicular to the original one.

Dihapto is just one pi orbtal overlaps with a metal  when bound side on. When the backdonation is very strong for a side on bound N2 the  double bond is formally broken, causing the dihapto binding?