This rule is usually followed in complexes with strong pi acceptors, and accounts for the stability of many hexacarbonyl compounds.
This rule is usually followed in complexes with strong pi acceptors, and accounts for the stability of many hexacarbonyl compounds. It cannot be exceeded by tetrahedral complexes, and deficient complexes can be made with bulky ligands. Counting the entities involved can be done by the donor pair method or by the neutral ligand method. Compounds that obey it tend to be less reactive, though platinate metals commonly form stable square planar compounds that are electron deficient according to this rule. Proposed by Irving Langmuir, it has been observed that more complexes violate this rule than obey it. It is analogous to a rule by Lewis, with the added consideration of filling a d orbital. For ten points, name this rule that predicts stability for transition metal complexes with a full valence shell.
This rule is usually followed in complexes with strong pi acceptors, and accounts for the stability of many hexacarbonyl compounds.
18 electron rule