Oxygen isotopic exchange in an MnIIIMn3IV-oxo cubane.
The rate and activation parameters for oxygen exchange of the mu(3)-oxo bridges in a manganese tetranuclear cluster with H(2)(18)O have been measured by ESI-MS; the observed DeltaS(double dagger) of -146 +/- 22 J K(-1.)mol(-1) is consistent with the expected associative mechanism of substitution.
Ohlin
C André
CA
Department of Chemistry, University of California, Davis, CA 95616, USA.
Brimblecombe
Robin
R
Spiccia
Leone
L
Casey
William H
WH