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Acetylene – Molecular Orbital Viewer

Acetylene (C₂H₂) – Molecular Orbitals

HF/STO-3G  |  Isosurface cutoff: 0.05  |  Default: MO 6 π HOMO

MO #SymmetryTypeEnergy (au)Description
1 σg σ −11.000C 1s core
2 σu σ −10.997C 1s core
3 σg σ −0.954 σ C–C bonding
4 σu σ −0.705 σ C–H bonding
5 σg σ −0.607 σ C–C bonding
6 πu π −0.349 π HOMO — 1 nodal plane (YZ plane)
7 πu π −0.349 π HOMO — 1 nodal plane (XZ plane, 90° from MO 6)
8 πg π* +0.397 π* LUMO — 2 nodal planes (YZ + XY)
9 πg π* +0.397 π* LUMO — 2 nodal planes (XZ + XY)