chemmacros \iupac command shows no formatting in titles

Question

i googled the problem and found that apparently nobody had issues with this before... I want to use compound names set up with the \iupac command of chemmacros in titles.

\documentclass{scrbook}

\usepackage{chemmacros}
\usechemmodule{all}

\begin{document}
 \chapter{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
  \section{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
   \subsection{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
    \subsubsection{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
     \paragraph{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
      \subparagraph{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
       \iupac{\trans-\N,\N'-\a-testo-weirdamide}
\end{document}

leaves me with this:

Any way to activate the formatting in the title or do I have to let go of the \iupac command? I need the "trans" and the "N"s in italics.

Answer 1

You get a warning, namely

LaTeX Font Warning: Font shape `OT1/cmss/bx/it' undefined
(Font)              using `OT1/cmss/bx/n' instead on input line 7.

which means that sans serif boldface italic is not available with Computer Modern Sans.

You can switch to Latin Modern with \usepackage{lmodern} or to T1 encoding with \usepackage[T1]{fontenc}.

You may also want to load textgreek.

\documentclass{scrbook}
\usepackage[T1]{fontenc}

\usepackage{chemmacros}
\usepackage{textgreek}
\usechemmodule{all}
\chemsetup{greek=textgreek}

\begin{document}
 \chapter{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
  \section{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
   \subsection{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
    \subsubsection{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
     \paragraph{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
      \subparagraph{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
       \iupac{\trans-\N,\N'-\a-testo-weirdamide}
\end{document}

For Times, you can adjust textgreek to use Tempora, but don't use mathptmx, which is basically a big kludge.

\documentclass{scrbook}
\usepackage[T1]{fontenc}
\usepackage{newtxtext,newtxmath}

\usepackage{chemmacros}
\usepackage{textgreek}
\usechemmodule{all}
\chemsetup{greek=textgreek}

\renewcommand*{\textgreekfontmap}{
   {qhv/b/*}{LGR/cmss/bx/*}
   {qhv/*/*}{LGR/cmss/*/*}
   {*/*/*}{LGR/Tempora-TLF/*/*}}


\begin{document}
 \chapter{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
  \section{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
   \subsection{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
    \subsubsection{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
     \paragraph{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
      \subparagraph{\iupac{\trans-\N,\N'-\a-testo-weirdamide}}
       \iupac{\trans-\N,\N'-\a-testo-weirdamide}
\end{document}