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ChemOffice.Com - CambridgeSoft

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Administrator<br />

14 13 H 2.197 -0.8229 0.3289<br />

15 14 H 2.7422 0.7763 -0.282<br />

16 15 H 1.5961 0.9769 1.9574<br />

17 16 H 0.7156 1.8784 0.679<br />

18 17 H -0.8718 0.6068 2.0941<br />

19 18 H -0.004 -0.9319 1.7721<br />

20 19 H -2.7422 -0.593 0.9688<br />

21 1 1 2 SINGLE<br />

22 2 1 6 SINGLE<br />

23 3 1 7 SINGLE<br />

24 4 1 8 SINGLE<br />

25 5 2 3 SINGLE<br />

26 6 2 9 SINGLE<br />

27 7 2 10 SINGLE<br />

28 8 3 4 SINGLE<br />

29 9 3 11 SINGLE<br />

30 10 3 12 SINGLE<br />

31 11 4 5 SINGLE<br />

32 12 4 13 SINGLE<br />

33 13 4 14 SINGLE<br />

34 14 5 6 SINGLE<br />

35 15 5 15 SINGLE<br />

36 16 5 16 SINGLE<br />

37 17 6 17 SINGLE<br />

38 18 6 18 SINGLE<br />

40 19 7 19 SINGLE<br />

Each line represents a data record containing one or<br />

more fields of information about the molecule.<br />

Each field is delimited by spaces or a tab. The fields<br />

used by Chem3D are described below:<br />

1. Line 1 contains two fields. The first field is the<br />

total number of atoms in the molecule and the<br />

second field is the total number of bonds.<br />

2. Lines 2–20 each contain 5 fields of information<br />

about each of the atom in the molecule. The<br />

first field is the serial number of the atom. The<br />

second field is the atom type, the third field is<br />

the X coordinate, the fourth field is the<br />

Y coordinate and the fifth field is the<br />

Zcoordinate.<br />

NOTE: Atom types in the Alchemy file format are<br />

user-definable. See “Editing File Format Atom Types”<br />

on page 619 for instructions on modifying or creating an<br />

atom type.<br />

3. Lines 21–40 each contain 4 fields describing<br />

information about each of the bonds in the<br />

molecule. The first field is the bond number<br />

(ranging from 1 to the number of bonds), the<br />

second field is the serial number of the atom<br />

where the bond begins, the third field is the<br />

serial number of the atom where the bond<br />

ends, and the fourth field is the bond type. The<br />

possible bond types are: SINGLE, DOUBLE,<br />

TRIPLE, AMIDE, or AROMATIC. Note that<br />

all the bond order names are padded on the<br />

right with spaces to eight characters.<br />

FORTRAN Formats<br />

The FORTRAN format for each record of the<br />

Alchemy file is as follows:<br />

Line<br />

Number<br />

Description<br />

1 number of atoms,<br />

number of bonds<br />

2–20 atom serial<br />

number, type, and<br />

coordinates<br />

21–40 bond id, from<br />

atom, to atom,<br />

bond type<br />

FORTRAN<br />

Format<br />

I5, 1X,<br />

ATOMS,1X,I5,<br />

1X, BONDS<br />

I6,A4,3(F9.4)<br />

I6,I5,I6,2X,A8<br />

620• File Formats <strong>CambridgeSoft</strong><br />

File Format Examples

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