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Strong Binding of Noble Gases to [B12X11](-): A Theoretical Study

机译:惰性气体与[b12x11]( - )的强束缚:理论研究

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摘要

We systematically explore the stability and properties of [B(12)X(11)NG](-) adducts resulting from the binding of noble gas atoms to anionic [B12X11](-) clusters in the gas phase of mass spectrometers. [B12X11](-) can be obtained by stripping one X- off the icosahedral closo-dodecaborate dianion [B12X12](2-). We study the binding of the noble gas atoms He, N; Ar, Kr, and Xe to [B12X11](-) with substituents X = F, Cl, Br, I, and CN. While He cannot be captured by these clusters and Ne only binds at low temperatures, the complexes with the heavier noble gas atoms Ar, Kr, and Xe show appreciable complexation energies and exceed 1 eV at room temperature in the case of [B-12(CN)(11)Xe](-). The predicted B-NG equilibrium distance in the complexes with Ar, Kr, and Xe is only 0.10-0.25 angstrom longer than the sum of the covalent radii of the two corresponding atoms, and a significant charge transfer from the noble gas atom to the icosahedral B 12 cage is observed.
机译:我们系统地研究了在质谱仪气相中惰性气体原子与阴离子[B12X11](-)团簇结合产生的[B(12)X(11)NG](-)加合物的稳定性和性质。[B12X11](-)可以通过从二十面体十二硼酸closo二阴离子[B12X12](2-)中剥离一个X-来获得。我们研究惰性气体原子He,N的结合;Ar、Kr和Xe与[B12X11](-)的结合,取代基X=F、Cl、Br、I和CN。虽然这些团簇不能捕获He,而Ne仅在低温下结合,但与较重惰性气体原子Ar、Kr和Xe的配合物显示出可观的络合能量,并且在室温下[B-12(CN)(11)Xe](-)的情况下超过1eV。在与Ar、Kr和Xe的配合物中,预测的B-NG平衡距离仅比两个相应原子的共价半径之和长0.10-0.25埃,并且观察到从惰性气体原子到二十面体B 12笼的显著电荷转移。

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