Premium
Kinetic Isotope Effects as a Mechanistic Tool for the Elucidation of the Rate‐Determining Step(s) in the Transition‐Metal‐Ion‐Mediated Activation of CH/CC Bonds. Ethylene Loss from Metastable 4‐Octyne/M ⊕ Complexes in the Gas Phase
Author(s) -
Schulze Christian,
Schwarz Helmut
Publication year - 1990
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199005091
Subject(s) - ethylene , metastability , chemistry , kinetic isotope effect , transition metal , olefin fiber , metal , isotope , two step , kinetic energy , ion , photochemistry , organic chemistry , catalysis , combinatorial chemistry , atomic physics , deuterium , physics , quantum mechanics
The nature of the transition‐metal ion M ⊕ determines which of the steps (CH activation or loss of olefin) will be rate‐determining in the regiospecific formation of ethylene from 4‐octyne: with M ⊕ = Cr ⊕ or Cu ⊕ it is CH activation, but with M ⊕ = Fe ⊕ it is the loss of ethylene. Both steps are subject to isotope effects, with M ⊕ = Cr ⊕ or Ni ⊕ .