Radical are atoms with unpaired electrons, and they have short lifetimes because the unpaired electrons are highly chemically reactive. The $\ce{H2O^{.+}}$ radical is named oxoniumyl. Is there a name for a hypothetical $\ce{H2O^{.-}}$ radical?

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    $\begingroup$ $\ce{H2O^{.-}}$ does not exist. $\endgroup$ – Mathew Mahindaratne Jun 25 '20 at 15:01
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    $\begingroup$ That is has not been proven to exist could be one thing (I have not found anything about it being proven to exist, did a quick and very shallow Google search. ) But that it cannot exist, is there theoretical proof for that? $\endgroup$ – Haverse Jun 25 '20 at 15:04
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    $\begingroup$ It might be a very unstable intermediate in some reduction of water reaction. $\endgroup$ – Mithoron Jun 25 '20 at 15:05
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    $\begingroup$ There is gas-phase hydrated radical anion $\ce{(H2O)_n^{.-}}$. I don't know if the anion exist for n=1. $\endgroup$ – Nilay Ghosh Jun 25 '20 at 16:21
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    $\begingroup$ @Haverse, what do you mean by that? Your quesion hasn't been closed, nobody has voted to close it, and nobody has even downvoted it. $\endgroup$ – orthocresol Jun 27 '20 at 6:35

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