Can this be a symmetry element ? talk ) 11 : 00, 16 November 2011 ( UTC)
12.
The identity symmetry element is found in all objects and is denoted "'E " '.
13.
In this mechanism, the symmetry element that persists throughout the entire mechanism is the ? mirror plane of reflection.
14.
In the late 1940s he demonstrated that the symmetry elements of a crystal structure can be deduced from observed diffraction data.
15.
For your second question, if the rotation and reflection are not correlated, then they still describe a symmetry element.
16.
Their phases are related to a fixed point in the crystal, defined in relation to the symmetry elements of that crystal.
17.
This can be done if the rotation axis can be unambiguously obtained from the combination of symmetry elements presented in the symbol.
18.
The ?-system molecular orbitals of butadiene are shown to the right along with the symmetry element with which they are symmetric.
19.
Rotation axes ( proper and improper ), reflection planes, and centers of symmetry are collectively called " symmetry elements ".
20.
If a symmetry element is present throughout the reaction mechanism ( reactant, transition state, and product ), it is called a conserved symmetry element.
