chemfig

Reaction schemes

3 Arrows features¶

Each arrow is characterized by:

• an angle expressed in degrees;

• a coefficient that specifies the arrow length through the multiplication of the compounds spacing value defined by compound sep;

• a style with TikZ instructions to customize the color, the thickness or other graphical attribute of the arrow.

These features are defined with the ⟨keys⟩

• arrow angle = ⟨angle⟩, which default value is 0;

• arrow coeff = ⟨decimal⟩, which default value is 1;

• arrow style = ⟨code tikz⟩, empty by default.

In order to locally modify one or all of these default values, the \schemestart command accepts an optional argument in the form [angle,coeff,style] which changes the default arrow features within the sole reaction scheme:

Regarding style, the rule is: the style specified in the argument in brackets applies after the default style, without overwriting it! This is why only the “black” color attribute is able to overwrite the “ blue” default style.

Finally, the \arrow command accepts an optional argument in brackets in the form [angle,coeff,style] to change the feature of that given arrow. As above, style applies after the default style and after the style possibly-specified in the optional argument of the \schemestart command, again without overwrting them.