Thank you for your question. There is no way to show that the sub- and superscripts are left hand to the “n” instead of right hand to the “2”. Just as the print reader will understand from the context of the reaction, so will the braille reader.
I can't seem to get the braille font to work tonight. Here is the ASCII. I have also attached an image of the braille.
$O #2;0^1"N+;43^97",TC
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