isoelectronic

https://doi.org/10.1351/goldbook.I03276
Two or more @M03986@ are described as isoelectronic if they have the same number of @V06588@ electrons and the same structure, i.e. number and @C01274@ of atoms, but differ in some of the elements involved. Thus: CO, N2 and NO+ are isoelectronic. CH2=C=O and CH2=N=N are isoelectronic.
CH3COCH3
and
CH3N=NCH3
have the same number of electrons, but have different structures, hence they are not described as isoelectronic.
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1128 [Terms] [Paper]
Cite as: IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). Online version (2019-) created by S. J. Chalk. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.
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Last revised: February 24, 2014