AI Article Synopsis
- Experiments on gas phase [Zn(H2O)N]2+ complexes (for N=4-7) indicate they can decay by releasing protons through a specific reaction.
- It is suggested that larger complexes have a stable [Zn(H2O)4]2+ core surrounded by additional water molecules via hydrogen bonding.
- At N=7, proton release may involve a chain of water molecules, aligning with theories about the role of Zn2+ in metalloenzymes.
Article Abstract
Experiments performed on gas phase [Zn(H2O)N]2+ complexes, for N in the range 4-7, show the ions readily undergo unimolecular (metastable) decay with respect to proton release via the reaction [Zn(H2O)N]2+--> Zn(2+)OH(-)(H2O)M + H3O(+)(H2O)N-M-2. To account for these products, it is proposed that the larger complexes have a stable [Zn(H2O)4]2+ core to which additional molecules are retained in an outer shell through hydrogen bonding. At N = 7, this arrangement would make it possible for proton release to be associated with a chain of up to four water molecules, which equates with ideas proposed for the activity of Zn2+ in metalloenzymes.
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