Synthetic and structural investigations of bis(N-alkyl-benzoselenadiazolium) cations. Issue 33 (31st July 2019)

• Record Type: Journal Article
• Authors: Lee, Lucia Myongwon; Corless, Victoria; Luu, Helen; He, Allan; Jenkins, Hilary; Britten, James F.; Adam Pani, Faisal; Vargas-Baca, Ignacio
• Is Part Of: Dalton transactions. Volume 48:Issue 33(2019)
• Page Start: 12541
• Page End: 12548
• Publication Date: 2019-07-31
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c9dt02311a
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A variety of supramolecular structures is formed by selenadiazolium cations linked by hydrocarbon bridges. Abstract : The synthesis, and spectroscopic and structural characterization of bridged dicationic derivatives of benzo-2, 1, 3-selenadiazoles are reported. The chloride salt of [H4 C6 NSeN–CH2 –CH2 –NSeNC6 H4 ] 2+ crystallizes forming a macrocyclic structure in which two cations are bridged by Se⋯Cl chalcogen bonds (ChBs), with a third chloride at the centre of the macrocycle. The structure of [1, 2-(H4 C6 NSeN)2 -C6 H10 ]Cl2 consists of two selenadiazolium cations linked by a chiral cyclohexane and capped by Se⋯Cl ChBs. Tetrafluoroborate salts of a xylene bridge crystallize in two pseudopolymorphs in which the cations form Se⋯F ChBs in an anti - or syn -conformation. The triflate salt of ethylene-bridged cations dimerizes through the formation of the [Se–N]2 supramolecular synthon with Se⋯O ChBs capping the second selenium atom. In contrast, [H4 C6 NSeN–CH2 –CH2 –CH2 –NSeNC6 H4 ](CF3 SO3 )2 only forms Se⋯O ChBs.