Citation: CAO Jing-Si, WEI Mei-Ju, CHEN Fei-Wu. Relationship between the Bond Dipole Moment and Bond Angle of Polar Molecules[J]. Acta Physico-Chimica Sinica, ;2016, 32(7): 1639-1648. doi: 10.3866/PKU.WHXB201604062 shu

Relationship between the Bond Dipole Moment and Bond Angle of Polar Molecules

Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing;Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Beijing 100083, P. R. China

Received Date: 11 January 2016
Revised Date: 6 April 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (21173020, 21473008).

The relationship between the bond angle and bond dipole moment is investigated. The atomic dipole moment corrected Hirshfeld (ADCH) charges are used to calculate the bond dipole moment. The electron localization function and its values at the bond critical points are exploited to analyze the bond′s electronic structures. Through analyzing the data of a series of covalent compounds formed by the IVA (IVA = C, Si, Ge), VA (VA = N, P, As), VIA (VIA = O, S, Se) and VIIA (VIIA = F, Cl, Br) group elements, it is found that, owing to the repulsion of bond dipole moments, the bond angles of these molecules become larger as their corresponding bond dipole moments increase if the bonds′ electronic structures are similar. This observation is also true for the ring molecules studied here, although a stress exists within the ring.
- Polar molecule,
- Bond angle,
- Bond dipole moment,
- Atom charge,
- Electronic local function
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