documentclass[a4paper, 12pt, twocolumn]{article}
usepackage[utf8]{inputenc}
usepackage{libertine}
usepackage{chemfig, chemmacros}

begin{document}
%chemfig{<atom1><bond type>[<angle>,<coeff>,<tikz code>]<atom2>}
chemfig{O-[67.15,1,draw=none]N-[-67.15, 1, draw=none]O}
end{document}