Synthesis Of Tetrachalcogenide-Substituted Phenalenyl Derivatives: Preparation And Solid-State Characterization Of Bis(3,4,6,7-Tetrathioalkyl-Phenalenyl)Boron Radicals
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY(2013)
Abstract
We report the synthesis and properties of a series of spiro-bis(3,4,6,7-tetrachalcogenide-substituted-phenalenyl)boron salts and two of the corresponding tetrathioalkyl-substituted spiro-bis(phenalenyl)boron radicals [tetrathiomethyl (10) and tetrathioethyl (11)] in which all of the active positions of the phenalenyl (PLY) nucleus are functionalized. In the solid state, radicals 10 and 11 exist as a weak pi-dimers due to the steric congestion of the thioalkyl groups in the superimposed PLY units. As a result, the spins are localized in the isolated (nonsuperimposed) PLY rings, and the structure, magnetic susceptibility measurements, and band structure calculations confirm that these PLY units are unable to undergo strong intermolecular interaction as a result of the orientation of the thioalkyl groups.
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Key words
synthesis,tetrachalcogenide-substituted,solid-state,tetrathioalkyl-phenalenyl
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