\environment ppchtex-mkiv-style

\startcomponent ppchtex-mkiv-frontviews

\chapter{Frontviews}

Structures \type{FIVE} and \type{SIX} can be displayed in a frontview.
However there are some limitations. Frontviews can not be rotated. Also the
coupling of several structures is limited.

We illustrate the frontview keys in two examples.

\startbuffer
\startchemical[height=4500,bottom=2500]
  \bottext{$\beta$-D-Fructopyranose}
  \chemical
    [SIX,FRONT,BB1236,+SB4,-SB5,Z5][O]
  \chemical
    [SIX,FRONT,+R12346,+RZ12346][\SR{HO},H,H,H,OH]
  \chemical
    [SIX,FRONT,-R12346,-RZ12346][H,OH,\SR{HO},H,CH_2OH]
\stopchemical
\stopbuffer

\startfiguretext
  [left][]
  {none}
  {\getbuffer}
\example
\typebuffer
\stopfiguretext

Positioning the radicals is an optimization of feasability and quality. The
next example will illustrate this.

\startbuffer
\startchemical[height=4500,bottom=2500]
  \bottext{$\alpha$-D-Fructofuranose}
  \chemical
    [FIVE,FRONT,BB125,+SB3,-SB4,Z4][O]
  \chemical
    [FIVE,FRONT,+R1235,+RZ1235][\SR{HO},H,\SR{HOH_2C},CH_2OH]
  \chemical
    [FIVE,FRONT,-R1235,-RZ1235][OH,H,\SR{HO},H,CH_2OH]
\stopchemical
\stopbuffer

\startfiguretext
  [left][]
  {none}
  {\getbuffer}
\example
\typebuffer
\stopfiguretext

\stopcomponent
