5
$\begingroup$

Are rate constants for water exchange of transition metal aqua-complexes tabulated anywhere ? I haven't been able to find a resource which is anywhere near comprehensive.

$\endgroup$
  • $\begingroup$ I think this part of Wikipedia article touches this $\endgroup$ – Mithoron Apr 10 '15 at 20:01
3
+50
$\begingroup$

Yes, see Fig. 1 and tables VI-VIII of SOLVENT EXCHANGE ON METAL IONS Advances in Inorganic Chemistry volume 54 pages 1-69.

Values vary over almost 20 orders of magnitude.

To make this not a link-only answer, roughly, per second exchange rates are:

$\ce{Ir^3+}$ $10^{-10}$

$\ce{Rh^3+}$ $2.2 \times 10^{-9}$

$\ce{Cr^3+}$ $10^{-6}$

$\ce{Ru^3+}$ $10^{-5}$

$\ce{Pt^2+}$ $10^{-3}$

$\ce{Ru^2+}$ $10^{-2}$

$\ce{V^2+}$, $\ce{Fe^3+}$ $10^2$

$\ce{Pd^2+}$, $\ce{V^3+}$ $10^3$

$\ce{Ni^2+}$ $10^4$

$\ce{Ti^3+}$ $10^5$

$\ce{Co^2+}$ $3.2 \times 10^6$

$\ce{Fe^2+}$ $4.4 \times 10^6$

$\ce{Mn^2+}$, $2.1 \times 10^7$

$\ce{Zn^2+}$ great uncertainty $5 \times 10^7 - 10^{10}$

$\ce{Cd^2+}$ $10^8$

$\ce{Cr^2+}$, $\ce{Hg^2+}$ $10^9$

$\ce{Cu^2+}$ $5.7 \times 10^9$

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.