Kinetics and reaction mechanisms of complexes with cobalt-carbon σ bonds of the type {(NH3)5Co-R}n+ in aqueous solutions, a pulse radiolysis study

Nurit Shaham, Alexandra Masarwa, Yoseph Matana, Haim Cohen, Dan Meyerstein

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

The kinetics of formation of complexes with cobalt-carbon σ bonds in the reaction between {CoII(NH3)5H2O}2+ or {CoII(NH3)6}2+ with different aliphatic radicals was studied in aqueous solutions using the pulse radiolysis technique, The formation of the complexes {(NH3)5ComIII-R}n+ obey pseudo first order rate laws and the rate constants for R = CH3 and CH2CO2- are (3.0±0.3)x1O7 and (2.1±0.3)x107 m-1s-1, respectively. The UV/Vis spectra of the complexes are reported and found to be in agreement with previous results for analogous complexes. The results point out that the reactions (NH3)5ConIII-R + R + NH3 → Co(NH3)62+ + R2 are fast thus limiting the radical route as a synthetic tool for the (NH3)5ComIII-R complexes.

Original languageEnglish
Pages (from-to)87-92
Number of pages6
JournalEuropean Journal of Inorganic Chemistry
Issue number1
DOIs
StatePublished - 1 Jan 2002

Keywords

  • Cobalt
  • Kinetics
  • N ligands
  • Radiolysis
  • Reaction mechanisms

ASJC Scopus subject areas

  • Inorganic Chemistry

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