Enthalpies of Reaction of Pentaammineruthenium(II) Complexes

James F. Wishart, Henry Taube, Kenneth J. Breslauer, Stephan S. Isied

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


Enthalpies have been obtained for substitution in aquopentaammineruthenium(II) by acetonitrile, imidazole, pyridine, thiodiethanol, pentaammine(pyrazine)ruthenium(II) ion, isonicotinamide, pyrazine, N-methylpyrazinium ion, dimethylsulfoxide, and carbon monoxide, by using a batch microcalorimeter. The values are-9.2,-9.3,-12.7,-13.7,-13.8,-15.3,-16.8,-18.0,-19.2, and-38.3 kcal mol-1, respectively. Enthalpies also were obtained for the protonation of pentaammine(pyrazine)ruthenium(II) ion (-4.9 kcal mol-1) and for the comproportionation of [((NH3)5Ru)2pyr]5+(-3.9 kcal mol-1). The enthalpies for the association of pentaammine(pyrazine)ruthenium(II) ion with H+and aquopentaammine ruthenium(II) are compared with published values for Ni2+(aq), Cu2+(aq), and Zn2+(aq).

Original languageAmerican English
Pages (from-to)2997-3001
Number of pages5
JournalInorganic Chemistry
Issue number19
StatePublished - Jan 1984
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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