The C1 point groupC1 carries 1 symmetry operation in 1 class, and no axis of rotation above the identity. A character table of the group therefore has 1 column and as many irreducible representations.It contains only proper rotations, so a molecule in it is chiral and optically active. It leaves a direction invariant, so a molecule in it may carry a permanent dipole.In Hermann-Mauguin notation it is 1, and it is one of the crystal classes of the triclinic system. A diffraction pattern from a crystal in it shows the Laue symmetry -1.

Bromochlorofluoromethane (CHFClBr): Four different substituents on one carbon leave no operation but E.

The 1 conjugacy class of C1, in the order a character table prints them.

Class

Operations in it

Molecular point groups with their operations and character tables, the 230 space groups with a cell builder, and the 17 wallpaper and 7 frieze groups drawn live. The tool needs JavaScript, and WebGL2 for the 3D views; these are the pages it offers: