A package for drawing 2D molecules using the TikZ package.

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5
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1answer
33 views

can't get to run chemfig module properly

I did structure formulas with latex before, but now I wanted to reaction mecanisms with electron movement arrows and everything. I used some example code to try and get to know the principles, but it ...
5
votes
1answer
242 views

font size in chemfig

I am using chemfig scaling and want to increase the font size, but not any other parameter of the molecule. So a MWE would be: \documentclass{article} \usepackge{chemfig} \begin{document} ...
5
votes
1answer
392 views

Drawing atomic orbitals upon a chemfig structure

Is there a way to draw an atomic orbital in a chemfig structure? I think you can better understand if you see want I want to get: Here is what I've already done. Any improvement would be appreciated. ...
5
votes
2answers
425 views

Two chemfig lewis diagrams side by side with labels below

MWE: \documentclass{report} \usepackage{chemfig} %for chemistry diagrams \begin{document} \vspace{10mm} \setatomsep{2em} \begin{center} \chemfig{% ...
4
votes
2answers
229 views

Radical ions with chemfig

Is there a way to draw a radical cation like using chemfig? Edit #2 \chemfig{C(-[:-150]Y)(=[:90,,,2]\radcationleft ...
4
votes
2answers
1k views

Drawing Kinetic Schemes in Latex

Do you think it would be possible to use the mhchem package and their arrows (e.g. <=>>) in drawing a cyclic kinetic scheme such as : or do you think it would be better to use a different ...
4
votes
2answers
380 views

Forked arrows with chemfig

How can one make a forked arrow in chemfig? Semantically it is exactly opposite to \merge command but seems like it's not implemented in a package. I don't have any experience with TikZ graphics but ...
4
votes
2answers
300 views

Two arrows in a row in chemfig

I have a problem drawing two arrows in a row in chemfig. I need : A->->B but when I place two arrows, I get a space between them which I don't need: A-> ->B How to fix that? Any help is ...
4
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1answer
218 views

How can I place H_2 on top of a N ? (aspartic and glutammic metal complexes)

Please consider the following code \documentclass{article} \usepackage{chemfig} \newcommand*\circleatom[1]{\tikz\node[circle,draw,fill=green!30]{\printatom{#1}};} \begin{document} ...
4
votes
2answers
62 views

How to prevent \underbrace from overlapping with a \chemfig?

A chemical formula I'm annotating overlaps with an underbrace, unless I use brackets. How can I prevent overlap without placing brackets? MWE: \documentclass{article} \usepackage{chemfig} ...
4
votes
1answer
88 views

Issue with cram bonds in chemfig

Using chemfig v1.1a, cram bonds are not drawn well in a way similar to the issue found in previous versions. Edit: My precise question here would be: does anyone know how to fix this? Or, worst case, ...
4
votes
1answer
363 views

How to annotate this chemical scheme using chemfig package?

To depict a chemical scheme with more than one reactant and more than one product, I used the handy package chemfig. I found some issues though annotating the below chemical reaction in a better way. ...
4
votes
2answers
157 views

Generate pdf document consisting in just one figure

Related to this question I am trying to generate a figure using package chemfig. Actually, my problem is that the lower part of the figure is cropped, specifically the H under the N. This is the ...
4
votes
1answer
60 views

chemfig, how to do these wavy markings?

I am trying to reproduce this: So far I have: \documentclass{memoir} \usepackage{tikz} \usepackage{chemfig} \usetikzlibrary{decorations.pathmorphing} \begin{document} ...
4
votes
1answer
143 views

Problem with mesomeric effect in chemfig

I'm trying to draw mesomeric effect for a molecule using chemfig I would like to create something like this: From the documentation page (see chapter 11 "Representing electron movements")seems easy ...
4
votes
2answers
163 views

How to move bond position with chemfig package?

I'm using this code to generate chemical structure with chemfig package: \documentclass[12pt,a4paper]{standalone} \usepackage{chemfig} \begin{document} \setatomsep{2.5em} ...
4
votes
1answer
141 views

Reaction sheme for Saponification with chemfig: horizontal and vertical placement

I want to draw the formation of a fat molecule like shown in the picture below I tried with hspace/vspace and yshift: \documentclass[margin=2cm]{standalone} \usepackage{chemfig} \begin{document} ...
4
votes
1answer
291 views

Text and figure alignment in chemfig reaction scheme?

I am new to chemfig, and I am trying to illustrate a reaction using the code: \documentclass{article} \usepackage{chemfig} \begin{document} \schemestart \chemname ...
4
votes
1answer
406 views

How to line up a chemical structure in the table (chemfig)?

I have a table which has three rows of chemical structures. The structures in the second row are not lined up with the first and third rows. I tried to use \vspace to bring the structure down but it ...
4
votes
1answer
662 views

Chemfig: how to write vertically?

I am trying to create a reaction scheme using chemfig. I can not understand though how to have text written vertically. Say my set of reaction A+B -> AB, A+C ->AC If I start writing \startscheme ...
4
votes
2answers
110 views

The two components of a double bond in different colors?

Using chemfig with the beamer class, I need to show the two "single bonds" of a double bond in different colors. It should be possible to change these colors for a given double bond on different ...
4
votes
1answer
226 views

amino acid — peptides chemfig

Inspired by this question chemfig and lego-style molecule construction, I decided to make a generic method of drawing peptides...that's a series of amino acids bonded together to the uninitiated. I ...
4
votes
1answer
77 views

chemfig Horizontal Aligment

I need to align some molecules according to this picture. 1st Point of alignment should be the beginning of the ring, 2nd point of alignment should be the 'N' on the right-hand chain. The bound to ...
4
votes
1answer
132 views

Distance between arrow and reaction product

Please tell me, How I can reduce a distance between arrow and feed substances. I want the same distances at all three directions. To make it clearer, I explain: I drew the side substances as a massive ...
4
votes
1answer
283 views

How do we mirror a reversible reaction arrow in chemfig

In Chemfig, the reversible reactions are represented with a double harpoon. The top one goes from the left to the right, the bottom from the right to the left. One can rotate this double arrow. But I ...
4
votes
1answer
336 views

chemfig: Colored atoms don't align, and how to draw bonds to an electric charge?

So I want to show the ionic interaction between a molecule and a charged element. But when I use color to highlight a part of the molecule, the bond alignment is no longer correct. The first example ...
4
votes
1answer
344 views

Relative positioning of Lewis electrons in chemfig

I am defining a submolecule in chemfig (2,2'-bipyridine) and I want to show the lone pair of electrons on both the Nitrogens. (For those who care, I wish to show a coordination bond between the lone ...
4
votes
1answer
808 views

joining atoms in chemfig. Two adjacent molcules

This is a follow up of drawing cellulose and aligning monomers in chemfig. I'm trying to refine the structure adding some hydrogen bonds. No problem with the intra-chain ones, but I cannot figure ...
4
votes
1answer
623 views

How to modify just some nodes' styles in chemfig

In the following molecular drawing, I want to only circle the rightmost OH of the first molecule and the leftmost H of the second, to show that they are the ones that are involved in the formation of ...
4
votes
1answer
52 views

chemfig: L-shaped arrow

I have a reaction scheme with three compounds. In this I'd like to use a L-shaped arrow having the possibiliy to put labels on. This kind of arrow is not provied by chemfig, so I customized my first ...
4
votes
1answer
41 views

Inconsistent spacing between a molecule and its name with chemfig

Why am I getting all this blank space after the phenylalanine molecule? \documentclass{article} \usepackage[dvipsnames, svgnames, x11names, table]{xcolor} \usepackage[version=4]{mhchem} ...
4
votes
2answers
84 views

Scale chemfig molecule in beamer with tikz

I want to show three different molecules on a beamer slide. The slide contains a tikzpicture (for positioning and uncovering together with the other elements), three nodes contain one molecule each. ...
4
votes
1answer
188 views

Color functional groups in chemfig syntax

I want to color simple functional groups in organic molecules using the chemfig package. I've come up with a solution that achieves what I want (MWE), but I find it very cumbersome. I thought it could ...
4
votes
1answer
415 views

How to line up the arrow and structure in chemfig

I have the following problems: in the first reaction scheme the arrow is too high and I would like to bring it a little down. in the second reaction scheme the third chemical structure (after the ...
4
votes
1answer
408 views

chemfig: reaction above arrow

I want to typeset a small reaction above a reaction arrow inside a scheme. Putting a \subscheme{} into the first of argument of \arrow unfortunately breaks the layout. Should I just try to position ...
4
votes
1answer
202 views

Anchor point seems incorrect for Chemfig package

I'm trying to use chemfig to draw a basic schematic for enzymatic browning and have encountered a problem. In the bottom reaction (bottom right to bottom left) quinone is formed by the enzyme (denoted ...
3
votes
2answers
312 views

Creating ethane using \chemfig

I was tinkering with chemfig package. I created the macros \documentclass{article} \newcommand{\lmethyl}{C(-[2]H)(-[4]H)(-[6]H)} \newcommand{\rmethyl}{C(-[2]H)(-[6]H)-H} ...
3
votes
2answers
195 views

Labeling Species of a Chemical Reaction

My code is: \documentclass[12pt,letterpaper]{report} \usepackage{blindtext} \usepackage[utf8]{inputenc} \usepackage[margin=1in]{geometry} \usepackage{titlesec} \setcounter{secnumdepth}{5} ...
3
votes
2answers
101 views

Aligning benzene wrt. its centre, in chemfig

Back again, with more questions. This time, I need to align a reaction scheme involving benzene. This is what I currently have: \diagram[1.0]{ \schemestart[0, 1.5, thick] ...
3
votes
3answers
267 views

Drawing chemical reactions

I am trying to draw reactions like this I tried it like this \documentclass[11pt]{article} \usepackage[version=4]{mhchem} \usepackage{chemfig} \begin{document} \ce{ \chemfig{CH_3-CH ...
3
votes
4answers
267 views

Chemical structures drawing: {table} vs \chemfig

I write a chemical structure as a table. Please help me understand, How can I reduce the distances between the rows and columns in a table? This is the structure of the zeolite and would like to make ...
3
votes
1answer
262 views

In chemfig, grouping with \color ineffective, unlike \textcolor

Some strange behaviour which contradicts the documentation was encountered when creating a figure of 5-cafeoylquinic acid with chemfig. It is stated in the manual that The atoms are displayed in ...
3
votes
1answer
1k views

List of schemes, caption and lining up the reaction in chemfig

I have several question regarding LaTeX and chemfig. My first question is : how to create a list of schemes similar to \listoftables and \listoffigures so I can add my reaction schemes to newly ...
3
votes
1answer
55 views

Using mhchem and chemfig: how to make image smaller and let it fit vertically?

Code \documentclass[10pt, a4paper]{article} \usepackage{lipsum} \usepackage[utf8]{inputenc} \usepackage{chemfig,stackengine,graphicx} \usepackage{xcolor,tikz} \usepackage[version=3]{mhchem} ...
3
votes
1answer
377 views

Simpler way to create chemical graphs using chemfig

chemfig is a great package to draw molecules. But it's not very fast. I am searching for a software to create chemfig code of chemical graphs (molecules, reactions etc.). It would be great if it is ...
3
votes
2answers
430 views

chemfig: align multiple reactions

How can I align multiple reactions to the reaction arrow using chemfig? In the MWE, I want to align the two reactions to the arrow. \documentclass{minimal} \usepackage{chemfig} \begin{document} ...
3
votes
1answer
147 views

How to change the default value bond length to an absolute value in chemfig?

Chemfig allows you to set bond length in the second argument of the bond, like -[,2] (a multiple of 2 to the default value). How to set the value of bond length for an absolute value (like 5mm), ...
3
votes
1answer
375 views

Representing movement of a single electron

I would like to represent the movement of a single electron in a reaction mechanism (grignard-reaction) Is there a predefined arrow (something like a harpoon) for that in chemfig? Or does anyone have ...
3
votes
3answers
816 views

How to scale a scheme in chemfig, using the figure environment

I am trying to scale a reaction scheme generated with chemfig to .9/textwidth. Below is my MWE. \documentclass{report} \usepackage{chemfig} \usepackage[version=3]{mhchem} \begin{document} ...
3
votes
1answer
190 views

Chemfig reaction to wide for twocolumn

For a paper I have to describe certain reactions. I am using the chemfig package to do this. The paper has to be two columns and this is where it goes wrong. When I compile this reaction: ...