Triphenylpropargylphosphonium Bromide

The asymmetric crystal unit of the title compound, C₂₁H₁₈P⁺Br^-, contains two formula units of similar geometry. The alkynyl residues of both independent cations donate hydrogen bonds to bromide ions with H...Br⁻ distances of 2.66 and 2.58 Å. This represents C-H...Br⁻ hydrogen bonding of considerable strength.

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