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High Pressure 17 O‐FT‐NMR. Evidence for the Associative Nature of Substitution Reactions on Mn 2+ in Water
Author(s) -
Ducommun Yves,
Newman Kenneth E.,
Merbach André E.
Publication year - 1979
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19790620745
Subject(s) - chemistry , associative substitution , aqueous solution , solvent , substitution (logic) , resonance (particle physics) , nuclear magnetic resonance spectroscopy , analytical chemistry (journal) , inorganic chemistry , stereochemistry , organic chemistry , catalysis , atomic physics , physics , computer science , programming language
The water exchange on [Mn(H 2 O) 6 ](ClO 4 ) 2 in aqueous solution has been studied as a function of pressure (up to 250 MPa), measuring 17 O‐FT‐NMR. linewidths of the free water resonance at 8.13 MHz. A pressure independent volume of activation, Δ V ≠ = −6.2 ± 0.2 cm 3 mol −1 is obtained, producing a clear evidence that, contrary to general belief, the mechanism for solvent exchange on Mn 2+ is an associative interchange ( I a ).