File:Thiocyanate-resonance-2D.png

${\displaystyle {\ce {S=C=N^{\ominus }<->\ ^{\ominus }\!S-C\!\equiv \!N}}}$

In your article, replace the image with:

<chem>S=C=N^\ominus <->\ ^{\ominus}\!S-C\!\equiv\!N</chem>

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