VSEPR
Molecules
Crystal Structures
Klotho
Stereographic (3D):
Atom Colors
Cations:
Na
Mg
Ca
Co
Zn
Cd
Cs
Anions:
O
F
Cl
S
Br
Note: the atom colors are:
B
C
N
O
F
S
Br
I
P
Te
Xe
H
Load Structure
You can load any single molecule in the lists.
The
ESP
surfaces show the charge distribution in the molecule. The surface corresponds to the 95% electron density surface (the electrons are found with in this surface 95% of the time). Red indicates areas of high electron denisty and blue low areas.
Organic:
Inorganic:
Biological:
Animations:
ESP Surfaces:
Molecular Display
This allows you to change the visual display of the moleucle.
Spacefilling:
changes the radius of the atoms
Ball & Stick:
atomic spheres connected by tubes
Tube:
bonds are tubes
Wireframe:
thin lines connect atoms
Proteins:
backbone trace, 2° structures as ribbons or rockets highlight water or ligands in proteins
3D:
display using anaglyphic glasses (colored) or crossed-eyed
Axes:
display the cartesian coordinate system.
VDW:
displays the Van der Waals surface for a molecule. Note this will be VERY time consuming for large moleucles.
Point Group:
displays the symmetry elements and Point Group of the molecule.
Atomic Size:
Schemes:
Proteins:
Highlight:
Stereographic (3D):
Axis:
VDW:
Point Group:
MEP
PAC
Measure
Measure a distance, angle or torsion angle by clicking on 2, 3 or 4 atoms respectively.
Distance is in Angstrom, angles in degrees.
Spin, Translate & Zoom
Rotate about the cartesian X, Y or Z axis, or pick any two atoms to define a rotating axis, Translate the molecule in the X - Y plane, or Zoom in or out
Spin about an Axis
Translate
Zoom
Center & Label
Center the display on a selected atom. Unchecking the box recenters the molecule. Label atoms by atom type.
Molecular Dipole & Hydrogen Bonding
Display the molecular dipole moment or hydrogen bonds.
Load Structure
Bravais Lattices:
are used to show some of the different lattice types in a larger structure.
Other Compounds:
are crystal structures of interest.
Bravais Lattices:
Other Compounds:
Spacefill
Spacefill:
adjusts the size of the ions as a percentage of the van der Waals radii.
(Note: the ionic radii is a more accurate representation of the size of ions).
Measure
Measure:
will allow you to measure bond distance, angle or torsion angles by clicking on 2, 3 or 4 atoms respectively.
Clear will remove all measurements.
Single Unit Cell
Single Unit Cell:
when a structure is loaded by choosing one of the compounds from the "Load Structures" lists only the unique atoms in the unit cell are displayed.
To display all atoms in a single unit cell use the "All Atoms" button.
Multiple Unit Cells
Multiple Unit Cells:
are used to display larger representations of the crystal structure.
Rotate
Rotate
about the X, Y Z axes or pick a pair of atoms to define your own axis of rotation.
Center
Center the structure with the specified atom in the center.
Miller Indices
Miller Indices:
display some of the Miller Indices (planes of atoms) of the unit cell.
Extras
Extras:
Unit Cell Parameters
turns on/off the unit cell parameters displayed in the upper left corner of the Jmol.Jmol applet.
Polyhedra
turns on/off a polyhedra showing the coordination of the ions in the structure.
Connect Atoms
turns on/off bonding between atoms in the crystal structure.
Boundary Box
turns on/off a box around the entire group of unit cells displayed.
Unit Cell
turns on/off the box and axes for the unit cell.
Load Geometric Structures
See the common 3D geometric structures
Load Example Molecules
See Examples of VSEPR 3D structures
Linear
Trigonal Planar
Tetrahedral
Trigonal Bypyramidal
Trigonal Bypyramidal
Pentagonal Bypyramidal
Extras
Extras:
Spin
: rotate about the Y axis
Display
Lone Pair Electrons
Measure
: bond lenghts or bond angles by clicking on two or three atoms
View
the structure in 3D
Measure:
Stereographic (3D):
Load Structure
You can load any single molecule in the lists. The Klotho data base contains over 400 biologically based chemicals. They have been subdivided into main groups for easier access.
source: www.biocheminfo.org
Note: Amines are not generally depicted correctly in this database. A trivalent nitrogen atom adjacent to an sp
2
center will generally become sp
2
itself.
Molecular Display
This allows you to change the visual display of the moleucle.
Spacefilling:
changes the radius of the atoms
Ball & Stick:
atomic spheres connected by tubes
Tube:
bonds are tubes
Wireframe:
thin lines connect atoms
Proteins:
backbone trace, 2° structures as ribbons or rockets highlight water or ligands in proteins
3D:
display using anaglyphic glasses (colored) or crossed-eyed
Axes:
display the cartesian coordinate system.
VDW:
displays the Van der Waals surface for a molecule. Note this will be VERY time consuming for large moleucles.
Point Group:
displays the symmetry elements and Point Group of the molecule.
Atomic Size:
Schemes:
Proteins:
Highlight:
Stereographic (3D):
Axis:
VDW:
Point Group:
Measure
Measure a distance, angle or torsion angle by clicking on 2, 3 or 4 atoms respectively.
Distance is in Angstrom, angles in degrees.
Spin, Translate & Zoom
Rotate about the cartesian X, Y or Z axis, or pick any two atoms to define a rotating axis, Translate the molecule in the X - Y plane, or Zoom in or out
Spin about an Axis
Translate
Zoom
Center & Label
Center the display on a selected atom. Unchecking the box recenters the molecule. Label atoms by atom type.
© 2013
R. Spinney
Last modified: 06/06/2022 02:04:24.