The reactivity of a carbon-centered σ,σ,σ,σ-type singlet tetraradical containing two meta-benzyne moieties, the 2,4,5,7-tetradehydroquinolinium cation, was examined in gas phase toward dimethyl disulfide, cyclohexane and allyl iodide. major reactions were thiomethyl radical abstraction, H atom abstraction respectively. this found to be greater than that relevant biradicals. individual meta-benz...