Observation of Four-Fold Boron-Metal Bonds in RhB(BO-) and RhB

被引：49

作者：

Cheung, Ling Fung ^{[1
]}

Chen, Teng-Teng ^{[1
]}

Kocheril, G. Stephen ^{[1
]}

Chen, Wei-Jia ^{[1
]}

Czekner, Joseph ^{[1
]}

Wang, Lai-Sheng ^{[1
]}

机构：

[1] Brown Univ, Dept Chem, Providence, RI 02912 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2020年 / 11卷 / 03期

基金：

美国国家科学基金会;

关键词：

PHOTOELECTRON-SPECTROSCOPY; CLUSTERS; C-2; MOLECULE; MULTIPLICITY; COMPOUND; SINGLE; ATOM;

D O I：

10.1021/acs.jpclett.9b03484

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The maximum bond order between two main-group atoms was known to be three. However, it has been suggested recently that there is quadruple bonding in C-2 and analogous eight-valence electron species. While the quadruple bond in C-2 has aroused some debates, an interesting question is: are main-group elements capable of forming quadruple bonds? Here we use photoelectron spectroscopy and computational chemistry to probe the electronic structure and chemical bonding in RhB2O- and RhB- and show that the boron atom engages in quadruple bonding with rhodium in RhB(BO)(-) and neutral RhB. The quadruple bonds consist of two pi-bonds formed between the Rh 4d(xz)/4d(yz) and B 2p(x)/2p(y) orbitals and two sigma-bonds between the Rh 4d(z)(2) and B 2s/2p(z) orbitals. To confirm the quadruple bond in RhB, we also investigate the linear Rh equivalent to B-H+ species and find a triple bond between. Rh and B, which has a longer bond length lower stretching frequency, and smaller bond dissociation energy in comparison with that of the Rh(sic)B quadruple bond in RhB.

引用

页码：659 / 663

页数：9

共 36 条

[21]

Pyykkö P, 2015, J PHYS CHEM A, V119, P2326, DOI [10.1021/jp50658191, 10.1021/jp5065819]

[22] Quadruple bonding of carbon in terminal carbides [J].