title: Synthesis of tetrachalcogenide-substituted phenalenyl derivatives: preparation and solid-state characterization of bis(3,4,6,7-tetrathioalkyl-phenalenyl)boron radicals.
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 π-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.
authors: Department of Chemistry and Chemical & Environmental Engineering, University of California-Riverside, Riverside, California 92521, United States.
authors: Pradip
authors: P
authors: Bag
authors: Sushanta K
authors: SK
authors: Pal
authors: Mikhail E
authors: ME
authors: Itkis
authors: Arindam
authors: A
authors: Sarkar
authors: Fook S
authors: FS
authors: Tham
authors: Bruno
authors: B
authors: Donnadieu
authors: Robert C
authors: RC
authors: Haddon