Topic summary
Isoelectronic

Extracted from the Wikipedia article Isoelectronicity.
Isoelectronicity is a phenomenon observed when two or more molecules have the same structure (positions and connectivities among atoms) and the same electronic configurations, but differ by what specific elements are at certain locations in the structure. For example, CO, NO
, and N
2 are isoelectronic, while CH
3COCH
3 and CH3N=NCH3 are not.