Theoretical investigation on multiple bonds in terminal actinide nitride complexes

Qun Yan Wu, Cong Zhi Wang, Jian Hui Lan, Cheng Liang Xiao, Xiang Ke Wang, Yu Liang Zhao, Zhi Fang Chai, Wei Qun Shi

Research output: Contribution to journalArticle

43 Scopus citations

Abstract

A series of actinide (An) species of L-An-N compounds [An = Pa- Pu, L = [N(CH2CH2NSiPri 3)3]3-, Pri = CH(CH3)2] have been investigated using scalar relativistic density functional theory (DFT) without considering spin-orbit coupling effects. The ground state geometric and electronic structures and natural bond orbital (NBO) analysis of actinide compounds were studied systematically in neutral and anionic forms. It was found that with increasing actinide atomic number, the bond length of terminal multiple An-N1 bond decreases, in accordance with the actinide contraction. The Mayer bond order of An-N1 decreases gradually from An = Pa to Pu, which indicates a decrease in bond strength. The terminal multiple bond for L-An-N compounds contains one s and two p molecular orbitals, and the contributions of the 6d orbital to covalency are larger in magnitude than the 5f orbital based on NBO analysis and topological analysis of electron density. This work may help in understanding of the bonding nature of An-N multiple bonds and elucidating the trends and electronic structure changes across the actinide series. It can also shed light on the construction of novel An-N multiple bonds.

Original languageEnglish (US)
Pages (from-to)9607-9614
Number of pages8
JournalInorganic Chemistry
Volume53
Issue number18
DOIs
StatePublished - Sep 15 2014

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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