CCSD(T) study on the structures and chemical bonds of AnO molecules (An=Bk-Lr)

doi:10.1088/1674-1056/abc3b1

Abstract The molecular geometries and dissociation energies of AnO (An=Bk-Lr) molecules were first obtained at the coupled-cluster single-, double-, and perturbative triple-excitations [CCSD(T)] level of theory. Four hybrid functionals, B3LYP, M06-2X, TPSSh, and PBE0, were also employed in the calculations for the sake of comparison. In comparison of the CCSD(T) results, B3LYP, TPSSh, and PBE0 functionals can obtain more appropriate results than M06-2X and MP2. The analyses on molecular orbitals show that the 7s, 6d, and 5f atomic orbitals of actinide (An) atoms participate in the bonding of An-O bonds. The partial covalent nature between An and O atoms is revealed by QTAIM analyses.

Keywords: ab initio calculation AnO (Bk-Lr) molecules density functional theory (DFT) chemical bonds

Received: 19 September 2020
Revised: 17 October 2020
Accepted manuscript online: 22 October 2020

PACS:	31.15.A-	(Ab initio calculations)
	31.15.ae	(Electronic structure and bonding characteristics)
	31.15.vn	(Electron correlation calculations for diatomic molecules)
	33.15.Fm	(Bond strengths, dissociation energies)

Fund: Project supported by the Education Department in Sichuan Province, China (Grant No. 15ZB0006).

Corresponding Authors: ^†Corresponding author. E-mail: sunxy@sicau.edu.cn

Cite this article:

Xiyuan Sun(孙希媛), Pengfei Yin(殷鹏飞), Kaiming Wang(王开明), and Gang Jiang(蒋刚) CCSD(T) study on the structures and chemical bonds of AnO molecules (An=Bk-Lr) 2021 Chin. Phys. B 30 033101

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CCSD(T) study on the structures and chemical bonds of AnO molecules (An=Bk-Lr)

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