Bis(2,4,6-tri-tert-butylphenyl)stannylene reacted with carbondisulfide by stepwise insertion of CS2 into the Sn−C bonds to furnish the aryltin(II) arenedithiocarboxylate (6) and tin(II) bis(arenedithiocarboxylate) (7). The structures of the three- and four-coordinated stannylenes 6 and 7 were determined by X-ray crystallography.