This point group contains the following symmetry operations:
E the identity operation
C5 a fivefold principal symmetry axis
5 * C2 five twofold symmetry axes orthogonal to the principal axis
σh a horizontal mirror plane intersecting the principal symmetry axis
5 * σv five vertical mirror planes aligned with the principal symmetry axis
S5 a fivefold improper rotation axis
A simple example for a D5h symmetric molecule is the cyclopentadienyl anion
(C5H5-), here in its HF/6-31G(d) optimized structure:
#P RHF/6-31G(d) opt=(Z-Matrix,tight) RHF/6-31G(d) opt min cyclopentadienyl anion D5h -1 1 X1 X2 1 1.0 C3 2 r3 1 90.0 C4 2 r3 1 90.0 3 +72.0 C5 2 r3 1 90.0 4 +72.0 C6 2 r3 1 90.0 5 +72.0 C7 2 r3 1 90.0 6 +72.0 H8 2 r8 1 90.0 7 +72.0 H9 2 r8 1 90.0 8 +72.0 H10 2 r8 1 90.0 9 +72.0 H11 2 r8 1 90.0 10 +72.0 H12 2 r8 1 90.0 11 +72.0 r3=1.19285213 r8=2.27287212 |
last changes: 08.06.2006, HZ questions & comments to: zipse@cup.uni-muenchen.de