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Think positive, keep the anions away: Hitherto unknown mono- and dications of the type [XE(μ-NTerE)]+ and [E2(μ-NTer)2]2+ (E=Sb, Bi; X=Cl, I) were studied and fully characterized for the first time. Salts bearing these highly reactive cations can be obtained from terphenyl-substituted cyclo-dipnictadiazanes [XE(μ-NR)]2 by halide abstraction or triflate substitution.
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Lehmann et al. (2012) studied this question.
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