Thallium(I)- and organothallium(III)-substituted mono-, bis- and tris-tetrazoles: synthesis and supramolecular structures

Abstract

Six thallium(I) tetrazolates have been synthesized by either the addition of an alcoholic solution of the appropriate tetrazole to an ethanolic solution of thallium ethoxide, or from the sodium salt of the tetrazole with Tl₂SO₄. Seven diphenylthallium-substituted mono- and bis-tetrazoles have been synthesized by a condensation route involving the appropriate tetrazole and diphenylthallium hydroxide. 1-Diphenylthallyl-5-phenyltetrazole has also been prepared by a cycloaddition reaction between diphenylthallium azide and benzonitrile. The structures of [Tl(18-crown-6)⁺]₂[C₂N₁₀²⁻], Ph₂TlN₄CPh·MeOH, 1,4-(Ph₂TlN₄C)₂C₄H₈·2MeOH and 1,2-(Ph₂TlN₄C)₂C₆H₄·Ph₂TlCl·2MeOH·2H₂O have been determined. The last three compounds generate supramolecular structures which incorporate six-membered Tl₂N₄ rings. The last two contain the first examples of tetrazoles which utilise all four available ring nitrogens for co-ordination.