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Ions of the form R2X+, where X is any halogen (X = Br+, bromonium ions; X = Cl+, chloronium ions; X = F+, fluoronium ions; X = I+, iodonium ions). They may be open-chain or cyclic. GNOC Recom. R-5.8.2. E.g. 
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Ions of the form R2X+, where X is any halogen (X = Br+, bromonium ions; X = Cl+, chloronium ions; X = F+, fluoronium ions; X = I+, iodonium ions). They may be open-chain or cyclic. GNOC Recom. R-5.8.2. E.g.