Talk:Quintuple bond

Are we sure that σ2π4δ2δ*2 is right? Shouldn't it be σ2π4δ4?

Wow, that's intensely embarrassing. I can't believe I didn't notice that it was wrong. Naffer 08:27, 15 February 2007 (UTC)

Ok. No it shouldn't! This is where the idea of a quintuple bond falls under close scrutiny. The energy levels occupied by the "last four" electrons fill both "bonding" and "antibonding" hydrogenetic orbitals. The question has been answered by DFT calculations which show a net negative energy on the "antibonding" delta* orbitals. It follows that the delta* orbitals have bonding character. This is not as simple as drawing a back of the envelope MO and filling it in with e-. Also, if you run a DFT calculation, the total bonding charachter it is less than five. RAW

Mistakes in an illustration
In the second illustration in the chapter "bonding" are several mistakes. The dz2 is two times in this drawing. In the first row the dz2 must be turned into the z-direction. In the second row the dxz orbitals are dyz orbitals, the dz2 orbitals are dxy. In the last row the dxy orbitals are dxz orbitals. compare: --Tormen21 (talk) 18:27, 15 January 2010 (UTC)
 * You beat me to it!72.16.221.130 (talk) 18:45, 17 August 2010 (UTC)