2-{[2,2-Bis(diethylamino)ethan-2-yliumthioyl]sulfanyl}-1, 1-bis-(diethylamino)-ethylium bis(perchlorate)

The title salt, C₂₀H₄₂N₄S₂ ²⁺·2ClO₄ ^-, was obtained from the reaction of bis-(diethyl-amino)-carbeniumdithio-carboxylate, (Et ₂N)₂C₂S₂, with Fe(ClO ₄)₂·6H₂O in CH₂Cl ₂. The title compound, in which one of the S atoms of (Et ₂N)₂C₂S₂ is bound to a 1,1-bis-(diethyl-amino)-ethane moiety, has two carbenium C atoms, and the charge compensation is provided by two perchlorate anions. The N₂C - CS₂ bond length is 1.512 (4) Å, corresponding to a C - C single bond, and the dihedral angle between N₂C- and -CS₂ planes [72.0 (2)°] is smaller than that of (Et₂N)₂C ₂S₂ [82.0 (1)°]. The crystal structure features C - H⋯S hydrogen bonds.