An {sup 17}O-NMR study of the exchange of water on AlOH(H{sub 2}O){sub 5}{sup 2+}(aq)

Journal Article · Mon Sep 21 04:00:00 EDT 1998 · Inorganic Chemistry

DOI:https://doi.org/10.1021/ic980333l· OSTI ID:669925

Nordin, J P; Sullivan, D J; Phillips, B L; Casey, W H ^[1]

---

1. Univ. of California, Davis, CA (United States)

The rates of exchange of solvent molecules from simple metal complexes have proven useful for understanding complicated reactions, even those at mineral surfaces. For this reason the authors have studied the effect of several geochemically important ligands on the rate of solvent exchange for Al(III) and found the lability of inner-sphere water molecules to be very sensitive to the type and number of other bound ligands. Although aluminum is among the most common elements in the Earth`s crust, the rates of solvent exchange for its hydrolyzed complexes have not been reported. In this paper the authors extend earlier work on Al(H{sub 2}O){sub 6}{sup 3+}(aq) to report the rate of exchange of water molecules from bulk solvent to the inner-coordination sphere of AlOH(H{sub 2}O){sub 5}{sup 2+}(aq). Results indicate that hydroxyl has a large labilizing effect on other inner-sphere hydration waters also in the complex.

• Sponsoring Organization: National Science Foundation, Washington, DC (United States); USDOE, Washington, DC (United States)
• DOE Contract Number: FG03-96ER14629
• OSTI ID: 669925
• Journal Information: Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 19 Vol. 37; ISSN 0020-1669; ISSN INOCAJ
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
58 GEOSCIENCES
ALUMINIUM COMPLEXES
AQUEOUS SOLUTIONS
EXPERIMENTAL DATA
GEOCHEMISTRY
HYDROXIDES
NMR SPECTRA
REACTION KINETICS
THERMODYNAMICS
WATER