Journal of the American Chemical Society p. 208 - 211 (1985)
Update date:2022-07-30
Topics:
Jackson, Richard A.
Ingold, Keith U.
Griller, David
Nazran, Avtar S.
Three complementary techniques have been used to obtain relative and absolute rate constants for the abstraction of α- and β-hydrogen atoms from (CH3CH2)4M (M=C, Si, Ge, Sn) by tert-butoxyl radicals.Both α and β positions of Et4M are activated for M=Si, Ge, Sn, as compared with the 1- and 2-positions in n-pentane.The activation was greater at the β than at the α position, and followed the order Sn>Ge>Si.This provides unequivocal evidence for anchimeric assistance to removal of hydrogen β to a Si, Ge, or Sn atom.
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