JSmol is an open source molecule viewer. It can retrieve structural data on molecules from databases and plot the molecules in three dimensions. It is possible to read the bond lengths and bond angles from the images. Use the search box to search using the name of a molecule or click on one of the buttons below. Right click on the image to access the JSmol menu.

Background

To find the distance between atom A and atom B, double click on atom A then double click on atom B. To find the angle formed by atoms A, B, and C; double click on atom A, single click on atom B, and double click on atom C.

Alkanes:
Alkenes:
Alkadienes:
Cycloalkanes:
DNA bases:
Amino acids:

Every molecule can be classified into a point group that describes the symmetries of the molecule. To see the point group, right-click on the background and select 'console'. In the command text field of the console type 'show pointgroup'.