http://www.ccl.net/cca/text-processing/tex/chemtex/chap6d.shtml
CCL chap6d.tex
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\def\LATEX{\LaTeX}
\let\TEX = \TeX
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\input{init.tex}
\input{fparts.tex}
\input{cto.tex}
\input{bonds.tex}
\begin {document}
\setcounter{page}{70}
\setcounter{chapter}{6}
\textfont1=\tenrm
\initial
\newcommand{\rhq}{An argument of Q'' causes no action. \ }
\newcommand{\ri}{All other argument values cause no action. }
\len=4

\vspace{\len mm}
\noindent D. \underline{General Utility Macros}

\vspace{\len mm}
\indent i. \underline{Macro $\backslash$fuseiv[9]}.
\ This macro typesets a fragment that is designed to be
connected at two places to another ring system with the
effect of fusing an additional sixring to that system.
The fragment can be fused to positions 1 and 2 of the
carbon fivering and the carbon sixring, and to positions
2 and 3 of the \verb+\+hetifive and \verb+\+hetisix rings
without changing
the unitlength and the \verb+\+yi coordinate.
\yi=200  \pht=750

$\fuseiv{R^1}{R^2}{R^3}{R^4}{D}{R^6}{Q}{Q}{D}$

\reinit
\begin{description}
\item[{\rm \ \ \ \ \ \ Arguments 1 -- 4:}]  \rhq  All other argument
values are used as the substituent formulas ${\rm R^1}$ --
${\rm R^4}$.
\item[{\rm \ \ \ \ \ \ Argument 5:}]  An argument of D''
prints a second bond between the upper point of
attachment and position 1 (this double bond is shown
in the diagram). \ri
\item[{\rm \ \ \ \ \ \ Argument 6:}] \rhq  An argument of D'' prints
a second bond between positions 1 and 2. All other argument
values are used as the substituent formula ${\rm R^6}$.
\item[{\rm \ \ \ \ \ \ Argument 7:}]  An argument of D''
prints a second bond between positions 2 and 3. All other
argument values cause no action.
\item[{\rm \ \ \ \ \ \ Argument 8:}] \rhq  An argument of D'' prints
a second bond between positions 3 and 4.  All other
argument values are used as a second substituent in
position 3 (not shown in the diagram).
\item[{\rm \ \ \ \ \ \ Argument 9:}] An argument of D'' prints
a second bond from the lower point of attachment to
position 4 (this double bond is shown in the diagram).
All other argument values cause no action.
\end{description}
\newpage
\indent ii. \underline{Macro $\backslash$fuseup[9]}.
\ This macro typesets a fragment that is designed to be
connected at two places to another ring system with the
effect of fusing an additional sixring to that system
at an angle. The fragment can be fused to positions
1 and 6 of the carbon sixring and positions 3 and 4 of
the \verb+\+hetisix rings without changing the unitlength
and the \verb+\+yi coordinate.

$\fuseup{R^1}{R^2}{R^3}{R^4}{D}{Q}{D}{Q}{D}$

\yi=300
\begin{description}
\item[{\rm \ \ \ \ \ \ Arguments 1 -- 4:}] \rhq  All other
argument values are used as the respective substituent
formulas ${\rm R^1}$ -- ${\rm R^4}$.
\item[{\rm \ \ \ \ \ \ Argument 5:}] An argument of D'' prints
a second bond from the upper point of attachment to
position 1 (the resulting double bond is shown in the
diagram). \ri
\item[{\rm \ \ \ \ \ \ Argument 6:}] An argument of D'' prints
a second bond between positions 1 and 2. \ri
\item[{\rm \ \ \ \ \ \ Argument 7:}] An argument of D'' prints
a second bond between positions 2 and 3 (the resulting
double bond is shown in the diagram). \ri
\item[{\rm \ \ \ \ \ \ Argument 8:}] An argument of D'' prints
a second bond between positions 3 and 4. \ri
\item[{\rm \ \ \ \ \ \ Argument 9:}] An argument of D'' prints
a second bond between position 4 and the lower point
of attachment (the resulting double bond is shown in
the diagram). \ri
\end{description}
\newpage
\indent iii. \underline{Macro $\backslash$fuseiii[6]}.
\ This macro typesets a fragment that is designed to be
connected at two places to another ring system with the
effect of fusing an additional fivering to that system.
The fragment can be fused to positions 1 and 2 of the
carbon fivering and sixring, and to positions 2 and 3 of
the \verb+\+hetifive and \verb+\+hetisix rings
without changing the unitlength and the \verb+\+yi
coordinate.
\pht=600

$\fuseiii{R^1}{R^2}{R^3}{R^4}{Q}{D}$

\begin{description}
\item[{\rm \ \ \ \ \ \ Arguments 1 -- 4:}] \rhq  All other
arguments are used as the respective substituent
formulas ${\rm R^1}$ -- ${\rm R^4}$.
\item[{\rm \ \ \ \ \ \ Argument 5:}] \rhq  All other argument
values are used as a second substituent in position~2
(not shown in the diagram).
\item[{\rm \ \ \ \ \ \ Argument 6:}] An argument of D''
prints a second bond between positions 1 and 2. \ri
\end{description}

\vspace{\len mm}
\indent iv. \underline{Macro $\backslash$cto[3]}.
\ This macro draws a reaction arrow and puts the requested
character strings representing reagents and reaction
conditions on top and below the arrow, respectively.
The arrow is made long enough to accommodate the longer
of the strings. The vertical position of the arrow can be
changed by changing the \verb+\+yi value.
\pw=1500

$\cto{string\ on\ top\ of\ the\ arrow}{string\ below}{26}$

\begin{description}
\item[{\rm \ \ \ \ \ \ Arguments 1 and 2:}] The character
strings above and below the arrow, respectively.
\item[{\rm \ \ \ \ \ \ Argument 3:}] An integer, the number of characters --
including subscripts -- in the longer string.
\end{description}

\vspace{\len mm}
\indent v. \underline{Macro $\backslash$sbond[1]}.
\ This macro draws a horizontal single bond of a specified
length, vertically centered on a line. It should be used
for structural formulas that do not use the picture
environment and are written on one line.

$\sbond{20}$

The argument is an integer, expressing the length of the
bond in printer points (1 pt = .35 mm).

\vspace{\len mm}
\indent vi. \underline{Macro $\backslash$dbond[2]}.
\  This macro draws a horizontal double bond of a
specified length. It should be used for structural
formulas that do not use the picture environment and
are written on one line.

$\dbond{20}{19}$

\begin{description}
\item[{\rm \ \ \ \ \ \ Argument 1:}] An integer, expressing
the length of the bond in printer points.
\item[{\rm \ \ \ \ \ \ Argument 2:}] An integer, expressing
the amount of vertical space by which the bonds have
to be pushed together to give the desired vertical
distance. In a document with double spacing, the
number 19 produced the spacing in the double bond
shown above.
\end{description}

\vspace{\len mm}
\indent vii. \underline{Macro $\backslash$tbond[2]}.
\ This macro is similar to \verb+\+dbond, except that it
draws a triple bond:

$\tbond{20}{20}$

The meaning of the arguments is the same as in
\verb+\+dbond. The number 20 was used as argument 2.
\vspace{\len mm}

\centerline{3. COMMON REQUIREMENTS FOR THE USE OF THE SYSTEM}
\vspace{\len mm}
So far in this thesis it has been explained how to write
LaTeX code to produce a chemical structure diagram at a
particular place in a document. This section will discuss the
mandatory and the optional statements at the beginning of an
input file that make the system of macros accessible and
its use more practical and convenient. Figure 6.1 contains
these statements together with the two required declarations
at the beginning of a LaTeX file, lines (1) and (9).
(The line numbers are for reference only, they are not used
in the input file.)

The part of the input file preceding the \verb+\+begin\{document\}
statement is called the preamble'' in the LaTeX Manual.
In addition to the statements shown here, the preamble usually
contains declarations pertaining to text formatting details
such as margin width, text height on a page, and space between
lines.

The statement in line (2) of figure 6.1 is necessary if the
structure-drawing macros of this thesis are to be used for
the preparation of a document. This statement reads the file
init.tex into TeX's memory, a file that contains two short
macros, \verb+\+initial and \verb+\+reinit. Macro \verb+\+initial
defines the command sequences \verb+\+xi, \verb+\+yi, \verb+\+pw,
\verb+\+pht, \verb+\+xbox, and \verb+\+len  as integer variables
and assigns a count register to each of them.  The use of the
first four variables in the picture declaration and the use
of \verb+\+xbox in a minipage or parbox environment was
explained in chapter III. The counter \verb+\+len is a general
purpose integer variable for the user. All the variables
except \verb+\+len are also given initial values. ---
Furthermore, the unitlength for the picture environments is
set to 0.1 printer points in \verb+\+initial. This is the
recommended unitlength for the chemical structure diagrams,
but it can be changed anywhere in the document. ---
Line (11) from figure 6.1 expands \verb+\+initial.

The macro \verb+\+reinit simply resets all the parameters
to their initial values from \verb+\+initial. It is a
convenience, especially for cases where more than one
variable needs to be reset.

\begin{figure}\centering
\begin{minipage}{8cm}
\begin{verbatim}
(1)  \documentstyle[12pt]{report}
(2)  \input{init.tex}
(3)  \input{rings1.tex}
(4)  \setcounter{totalnumber}{4}
(5)  \setcounter{topnumber{2}
(6)  \setcounter{bottomnumber}{2}
(7)  \renewcommand{\topfraction}{.5}
(8)  \renewcommand{\bottomfraction}{.5}
(9)  \begin{document}
(10) \textfont1=\tenrm
(11) \initial
\end{verbatim}
\end{minipage}
\caption{Statements at the beginning of a LaTeX file}
\end{figure}

The statement in line (3) of figure 6.1  reads a file
with structure-drawing macros. There will usually be
several such statements, reading in different macros or
sets of macros. At the installation where this work was
done the TeX memory is not large enough to read in all
the chemistry macros. TeX's own macros already take up
13\% of the reserved memory and when the LaTeX macros are
added, two thirds of the memory are used before an
input file is processed. --- Reading in just part of the
structure-drawing macros for any given document has the

Lines (4) -- (8) in figure 6.1 affect the placement of
floats'' on the page. The only floats discussed in this
thesis are the diagrams produced in the figure
environment (see chapter III). In defining the style
of a document -- the report style is designated by line (1) --
the LaTeX program sets default values for the maximum
total number of floats on a page (three), the maximum
number of floats at the top of the page (two), and at
the bottom of the page (one). These values can be
changed for documents with an unusually large number
of figures. Thus, lines (4) -- (6) increase the
maximum number of floats to 4, evenly distributed on
the page. It is then necessary to change the counters
\verb+\+topfraction and \verb+\+bottomfraction to
reflect the distribution of figures on the page.

Finally, line(10) is the optional redefinition of the
math textfont, discussed in chapter III. This definition
can be changed anywhere in the document.

\end{document}


 Modified: Sun Apr 14 16:00:00 1991 GMT Page accessed 7117 times since Sun Apr 16 11:32:33 2000 GMT