The group C ∞ ∞ v , contains rotations C ( ϕ ϕ ) through any angle ϕ ϕ about the axis of symmetry and an infinite number of reflections σ σ v through the planes containing the inter-nuclear axis (or the vertical axis, that is reason of the subscript ' v ').In the group C ∞ ∞ v all planes of symmetry are equivalent, so that all reflections σ σ v form a single class with a continuous series of elements; the axis of symmetry is bilateral, so that there is a continuous series of classes, each containing two elements C ( ± ± ϕ ϕ ) . Note that this group is non-abelian and there exists an infinite number of irreducible representations in the group. The character table of the group is as follows: