The right mouse button rotates the molecule, or translates it if Shift is
pressed, or rotates the "camera" if Ctrl is pressed.
2) Left-click to select an atom, right-click to deselect all atoms.
3)Double left-click on an atom to alter its type, label and the style of
3)Double left-click on an atom to alter its type, label and the style of label:
left-click on a bond to alter its type (e.g. to make it dotted), label and
the style of label.
right-click on an atom to alter its style (color, size, etc).
right-click on a bond to alter its style (color, size, etc).
on a parameter designation (line, arc) to drag it on the image.
on the edge of a parameter designation (line, arc) to alter its size and
on a parameter designation (line, arc) to alter its style (color, width,
Num5 places the center of molecule rotation into the center of coordinates
of selected atoms or of the whole molecule, if no atom is selected:
Space moves the molecule into the center of image.
Enter rotates the molecule to be best viewed.
Ctrl+D toggles on/off the dragging mode, in which you can drag atoms or
groups of atoms on the molecule's image:
an atom is dragged, it can be moved in Z direction (in parallel with the
view axis) via Num2/Num8 keys or buttons at the right panel:
a radical fragment is dragged, it can be rotated or moved in Z direction via
Num1-Num6 keys; Num7/Num9 keys alter the length of the bond connecting it
with outer molecule. The right panel duplicate these keys:
add/remove a bond, select 2 atoms via left-click and press Ctrl+B.
some cases, it is necessary to add or remove bonds in molecule to drag the
required groups of atoms:
dock two groups of atoms (two molecules), select 2 hydrogen or dummy atoms
belonging each of the group and choose "Edit/Unite two groups".
a radical fragment is copied from one site to another, the atom in it
connected with the outer molecule must be selected firstly:
using Chemcraft with Gaussian, typing #P in input files is recommended.
21) To examine the value of a distance, select 2 respective atoms via left-click: the value will be shown in the textbox at the bottom of the main window.
examine the value of an angle or a dihedral, select 3 or 4 respective atoms via left-click: the
value will be shown in the textbox at the bottom of the main window.
alter a bond length, select 2 respective atoms, enter the new bond length in
the textbox at the bottom and press the "Set" button near it:
alter an angle or a dihedral in the molecule, select 3 or 4 respective
atoms, enter the new value in the textbox at the bottom and press the
"Set" button near it.
altering a geometrical parameter, you can choose whether the coordinates of
groups of atoms should be modified symmetrically or not:
items "Edit/Add atom" and "Edit/Add fragment" allow new
molecules to be built from individual atoms or molecular fragments.
item "Edit/Insert dummy atom into center of selected" places a
dummy atom into the coordinates center of selected atoms.
item "Edit/Set principal axes" computes the moment of inertia
tensor and sets the axes according to its eigenvectors.
Chemcraft incorrectly identifies bonds in your molecule, choose “Tools/Chemcraft
Coord mode, pressing "Paste" twice automatically switches to Image
Ctrl+R reloads the last opened file.
of the most useful features of Chemcraft is the utility for setting a
symmetry point group of the molecule:
The option “Tools/Simple utilities/calculate occupancies by energies”
can be used for quick computation of relative energies (e.g. to find the
energy of ionization).
The option “Tools/Scripts/Generate Gaussian batch file” provides a very
convenient way of running multiple jobs.
The option “Tools/Create animation/Build animated…” can be used for
obtaining any animated gif file, not only related to molecules.