Talk:Sextuple bond
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Wiki Education Foundation-supported course assignment edit
This article was the subject of a Wiki Education Foundation-supported course assignment, between 26 September 2019 and 6 December 2019. Further details are available on the course page. Student editor(s): Gemar145. Peer reviewers: Achia UW.
Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 09:04, 17 January 2022 (UTC)
very low temperatures? edit
Could someone who knows more than I about this please specify very low temperatures mentioned in the first paragraph? Nirmos (talk) 03:47, 20 December 2009 (UTC)
- Removed. Correct me if I'm wrong, but IMO, low temperatures (like 7K here) were only needed to trap the molecules for the study, whereas they are produced in a flash and have "high temperature" (probably no equilibrium) there. Materialscientist (talk) 03:59, 20 December 2009 (UTC)
Does Mo2 really have Sextuple bond? edit
According to the MO diagram,I think the bond order of Mo2 is less than six.--Makecat (talk) 04:02, 11 February 2011 (UTC)
- Why? Each Mo atom has 5d+1s electron. If all contribute, then we've got 6 electron pairs (bonds) between them. Materialscientist (talk) 04:16, 11 February 2011 (UTC)
- How many sigma,pai,delta bonds are there in the molecule Mo2?I think there may be two sigma bonds in Mo2,is this opinion right?--Makecat (talk) 05:28, 12 February 2011 (UTC)
One sigma bond and 5 delta bonds, per doi:10.1002/anie.200603600. Materialscientist (talk) 07:47, 18 February 2011 (UTC)- Huh??? Two pi's (4dxz, 4dyz), one sigma (4dz2), two delta's (4dx2-y2, 4dxy), and another sigma (5s). Nergaal (talk) 16:40, 18 February 2011 (UTC)
- (Palm face). I meant 1xs electron and 5xd electrons. My ref doesn't clearly list the bonds, but their orbital diagram seem to support what Nergaal wrote. See also this. Materialscientist (talk) 00:56, 19 February 2011 (UTC)
- Two sigma bonds? That's interesting.--Makecat (talk) 12:59, 23 February 2011 (UTC)
- (Palm face). I meant 1xs electron and 5xd electrons. My ref doesn't clearly list the bonds, but their orbital diagram seem to support what Nergaal wrote. See also this. Materialscientist (talk) 00:56, 19 February 2011 (UTC)
- Huh??? Two pi's (4dxz, 4dyz), one sigma (4dz2), two delta's (4dx2-y2, 4dxy), and another sigma (5s). Nergaal (talk) 16:40, 18 February 2011 (UTC)
- How many sigma,pai,delta bonds are there in the molecule Mo2?I think there may be two sigma bonds in Mo2,is this opinion right?--Makecat (talk) 05:28, 12 February 2011 (UTC)
How about Tc
2?
edit
Can it have a 7-tuple (14-electron) bond, based on MO diagram? I know this conflicts current evidence, but still.80.98.179.160 (talk) 15:30, 19 March 2018 (UTC)
- Re2 and Os2 appear to have bond orders of around 6.26: compare Mo2 (6.33) and W2 (6.14). The weakened bonding may be due to the half-filled d-shell at group 7; certainly Mn2 (0.09) is a pure van der Waals dimer (like Zn2, Cd2, and Hg2), and even Tc2 (4.37) does not have as strong bonding as Re2. You can see this effect as well in the melting and boiling points of the transition metals: Mn has anomalously low melting and boiling points, Tc is lower than Mo and Ru but isn't lower by as much, and Re sits smoothly on a monotonic trend from W to Os. Double sharp (talk) 14:13, 20 March 2018 (UTC)
- Ir
2? 80.98.179.160 (talk) 19:51, 20 March 2018 (UTC)- Ir2 has bond order 4.44 according to the paper. Double sharp (talk) 01:15, 21 March 2018 (UTC)
- Ir
ReOs? ReIr? RePt? Alfa-ketosav (talk) 09:12, 2 October 2018 (UTC)