The outer valance orbital electron densities of cyclopentane by binary (e,2e) spectroscopy

Area of Science:

• Physical Chemistry
• Quantum Chemistry

Background:

• Cyclopentane (C5H10) is a cyclic alkane with significant applications.
• Understanding its electronic structure is crucial for predicting its chemical behavior.

Purpose of the Study:

• To investigate the binding energy spectra and electron momentum distributions of cyclopentane's valence orbitals.
• To compare experimental results with theoretical calculations.

Main Methods:

• Electron Momentum Spectroscopy (EMS) was employed using a noncoplanar symmetric geometry.
• High impact energy (1200 eV) and good energy resolution (1.2 eV) were utilized.
• Experimental data were compared with Hartree-Fock and Density Functional Theory (DFT) calculations.

Main Results:

• Experimental momentum profiles for outer valence orbitals were obtained.
• Theoretical momentum distributions were calculated using Hartree-Fock and DFT methods.
• Both theoretical methods, with large basis sets, generally agreed well with experimental shapes.

Conclusions:

• The study successfully characterized the electronic structure of cyclopentane using EMS.
• Hartree-Fock and DFT methods provide reliable descriptions of cyclopentane's valence electron momentum distributions.
• This work validates theoretical approaches for studying molecular electronic structures.