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Molecular structure of cation 2 c in the crystal of [2 c]2[B12Br12] x 8 [H2CCl2]. Pertinent bond lengths and angles: Se−Si 243.05(6) pm; Se−C5 192.4(2) pm; Si−C6 185.2(2) pm; β 1 115.37(16)°; β 2 125.7(2)°; β 3 114.85(16)°; C5‐Se‐Cipso 101.19(9)°; C6‐C1‐Se‐Si −7.941(67)°; Σα(SiC3) 346.06(3)°; Σα(Se)=288.41(2)°; Σβ=355.9(4)°. (Thermal ellipsoids drawn at 50 % probability, hydrogen atoms are omitted, color code: grey carbon; violet silicon; red selenium).
