10-Valence-Electron C≡O and the 14-VE C≡Pt: Two Triple-Bonded Isoelectronic Families Differing by a dδ4 Ring
Michiko Atsumi,
Pekka Pyykkö
Abstract:10-VE A≡A′
Diatomics, such as N≡N, C≡O,
etc., have a strong σ
2
π
4
triple
bond plus a lone pair at each end. In our studies on 14-VE A≡B
systems, such as C≡Pt, we find a similar bonding system plus
a (5
d
δ)
4
ring. Here, the A atom
belongs to groups 13–17 and the B atom to groups 7–11.
Also the BB′ combinations, triatomics, such as PtCO or DsCO
or uranyl, and longer chains, such as AuCN and [NC-Au-CN]
−
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