# LaTeX code for arrow

What is the LaTeX code for this kind of arrow:

These are useful in chemical kinetics and parallel reactions...

Also how to draw arrows for redox reactions?

I mean those arrows above and below...

(here i drew it using MS-Word!)

Thanks a lot!

• – Sigur May 8 '15 at 16:05
• @Sigur Thanks but any idea of the first one? – NeilRoy May 8 '15 at 16:07
• – Sigur May 8 '15 at 16:09
• Any of the LaTeX-friendly drawing tools could do the first one, even a simple picture environment with a couple of \lines and \vectors. But it's hard to recommend an appropriate solution without some idea of what you would prefer to use. If the context is chemistry then you should probably get to grips with chemfig – Thruston May 8 '15 at 18:01

Redox reactions can be typeset using the chemmacros package. The manual has a number of examples. Here is a quick try:

\documentclass{article}
\usepackage{chemmacros}

\begin{document}

\ch{
"\OX{o1,Zn}" \sld{} + "\OX{r1,Cu}" {}^2+ \aq
->
"\OX{r2,Cu}" \sld{} + "\OX{o2,Zn}" {}^2+ \aq
}
\redox(o1,o2)[->]{\small oxidation (2 electrons lost)}
\redox(r1,r2)[->][-1]{\small reduction (2 electrons gained)}

\end{document}


The first question is answered here: Forked arrows with chemfig