isoelectronic species of Methane
Answers
Explanation:
Isoelectronicity is an effect observed when distinct molecular entities have identical electron configurations. Two or more molecular entities are described as isoelectronic if they have the same number of valence electrons and the same structure, i.e. number and connectivity of atoms, but differ in some of the elements involved. [1]
This definition is sometimes termed valence isoelectronicity, in contrast with various alternatives. At one extreme these require identity of the total electron count and with it the entire electron configuration.[2] More usually, alternatives are broader, and may extend to allowing different numbers of atoms in the species being compared.[3]
The importance of the concept lies in identifying significantly related species, as pairs or series. Isoelectronic species can be expected to show useful consistency and predictability in their properties. (Slight differences of, for example, structural formula, such as a double versus single bond, commonly have major effects.)
Electron-density calculations have been performed on many common substances, resulting in reaction predictions. Identifying a new, rare or odd compound as isoelectronic with one already characterised offers clues to possible properties and reactions.....
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Vibrational spectra and force fields of the isoelectronic species tetrakis(methylmercurio)methane, C(HgCH3)4, and tetrakis(amminemercurio)methane cation, [C(HgNH3)4]4+