A niobium-necked cluster [As3Nb(As3Sn3)](3-) with aromatic Sn3(2-) 

Dalton Transactions : an International Journal of Inorganic Chemistry
Fu-Xing PanZhong-Ming Sun

Abstract

We describe here the synthesis and characterization of a ternary cluster compound [As3Nb(As3Sn3)](3-) (1), in which a niobium(v) atom is coordinated by an As3(3-) triangle and a bowl-type As3Sn3(5-) ligand. Cluster 1 was synthesized by dissolving K8NbSnAs5 (2) in the presence of [2.2.2]crypt in ethylenediamine solution, filtered and layered with toluene, then crystallized in the form of [K([2.2.2]crypt)]3[As3Nb(As3Sn3)]·en·tol. The flower-vase shaped compound 1 features a new structure type, rather different from the known Zintl phases. The stability and bonding of 1 are elucidated via extensive bonding analyses. The Sn3 ring is found to have σ-aromaticity featuring a delocalized Sn-Sn-Sn σ bond. Electronic structure calculations confirm the Nb(v) oxidation state and weak Nb-Sn and Sn-Sn bonding, in addition to the normal Nb-As and As-As bonds.

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Citations

Mar 25, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Wan-Lu LiJun Li
May 19, 2018·Chemistry : a European Journal·Chao LiuZhong-Ming Sun
May 21, 2021·The Journal of Physical Chemistry. a·Maksim KulichenkoLai-Sheng Wang
May 18, 2021·The Journal of Physical Chemistry. a·Sviatoslav BaranetsSvilen Bobev

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