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Open AccessArticle

Analogies between Vanadoborates and Planar Aromatic Hydrocarbons: A High-Spin Analogue of Aromaticity

Department of Chemistry, University of Georgia, Athens, GA 30602, USA
Materials 2018, 11(1), 15; https://doi.org/10.3390/ma11010015
Received: 8 December 2017 / Revised: 19 December 2017 / Accepted: 22 December 2017 / Published: 23 December 2017
(This article belongs to the Special Issue Polyoxometalate and Nanohybrid Materials)
The vanadium-vanadium interactions in the polygonal aggregates of d1 vanadium(IV) atoms, with a total of 4k + 2 vanadium electrons (k an integer) imbedded in an electronically inactive borate matrix in certain vanadoborate structures are analogous to the ring carbon-carbon interactions in diamagnetic planar cyclic hydrocarbons. They thus represent a high-spin analogue of aromaticity. Thus, the vanadoborate anion [V6B20O50H8]8− with six V(IV) electrons (i.e., 4k + 2 for k = 1) contains a macrohexagon of d1 V(IV) atoms with four unpaired electrons. This high-spin system is related to the low-spin aromaticity in the diamagnetic benzene having six π electrons. Similarly, the vanadoborate anion [V10B28O74H8]16− with ten V(IV) electrons (i.e., 4k + 2 for k = 2) contains a macrodecagon of d1 V(IV) atoms with eight unpaired electrons. Again, this high-spin system is related to the aromaticity in the diamagnetic 1,6-methanol[10]annulene, having ten π electrons. View Full-Text
Keywords: vanadium; boron; vanadoborates; planar aromatic hydrocarbons; aromaticity vanadium; boron; vanadoborates; planar aromatic hydrocarbons; aromaticity
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MDPI and ACS Style

King, R.B. Analogies between Vanadoborates and Planar Aromatic Hydrocarbons: A High-Spin Analogue of Aromaticity. Materials 2018, 11, 15.

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