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About: Tolman's rule     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatEmpiricalLaws, within Data Space : dbpedia.org associated with source document(s)

Type: yago:Abstraction100002137yago:Collection107951464yago:Group100031264yago:Law108441203yago:WikicatEmpiricalLaws New Facet based on Instances of this Class

Tolman's rule states that, in a certain chemical reaction, the steps involve exclusively intermediates of 18- and 16 electron configuration. The rule is an extension of the 18-electron rule. This rule was proposed by American chemist Chadwick A. Tolman. As stated above, Tolman's rule, even for reactions that proceed via 2e− steps, is incorrect because many reactions involve configurations of fewer than 16 e−. CH3I + cis-[Rh(CO)2I2]− → [(CH3)Rh(CO)2I3]− Conversely, complexes of 18 electron configuration tend to dissociate ligands or undergo reductive elimination: Rh(PPh3)3ClH2 → Rh(PPh3)3Cl + H2