Dimeric dithiocarbamates of stannolane. An example of the presence of secondary bonds in the formation of an inorganic ring. Molecular and crystal structure of 2-nbutyl-2-(dimethyldithiocarbamate)-1,3,2-oxathiastannolane and 2-nbutyl-2-(piperidyldithiocar

Two dithiocarbamate derivatives of stannolane, 2-nbutyl-2-(dimethyldithiocarbamate)-1,3,2-oxathiastannolane and 2-nbutyl-2-(piperidyldithiocarbamate)-1,3,2-oxathiastannolane have been obtained and full characterized. The X-ray single crystal diffraction studies show the presence of a dimer arrangement, through the formation of an inorganic ring. The bond lengths between the tin and all the S and O atoms are in the middle of covalent and secondary bonds, with a remarkable preference toward oxygen atoms. Both oxathiastannolane units present in solid state an equilibrium between conformations, while the arrangement of the three fused rings (oxathiastannolane–distannoxane–oxathiastannolane) is almost planar.