Journal
INORGANIC CHEMISTRY
Volume 60, Issue 21, Pages 16053-16058Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.1c02293
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Funding
- National Natural Science Foundation of China [11922405, 11874178, 91961204]
- High Performance Computing Center of Jilin University, Changchun, China
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The study explores the stability of planar pentacoordinate beryllium with six valence electrons, which is only constructed by s-block metals in BeM5+ (M = Cu, Ag, Au). The bonding in ppBe can be regarded as a result of sigma aromaticity originating from three delocalized s orbitals and electron sharing with doublet M-5(+) motifs.
Six-valence-electron planar pentacoordinate beryllium (ppBe) is explored herein as a global minimum, which is only constructed by s-block metals in BeM5+ (M = Cu, Ag, Au). The bonding in ppBe can be regarded as the excited-stated Be with a 2p(x)(1)2p(y)(1) electronic configuration, forming electron sharing with doublet M-5(+) motifs followed by two sets of Be(p(parallel to)) ->[M-5(+)] sigma donations and one Be(s) <-[M-5(+)] sigma back-donation. Thus, the sigma aromaticity originating from three delocalized s orbitals gives rise to the whole stability of the high D-5h-symmetry ppBe and strongly enriches s-block planar hypercoordinate bonding.
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