The crystal structure of the title complex 2[R2NCS&. Zn(4,4'-bipy) (R = Piperidyl), 1, revealed that it consists of dimers made up from two crystallographically independent molecules. Each zinc atom in 1 forms a Scoordinate pseudo-square-based pyramidal arrangement (with four Zn-S and one Zn-N interactions). Bondlengths to Zn with the coordinating atoms are comparable to those in other Zn(1I) dithiocarbamate complexes. The piperidine ring has a chair conformation. To allow improved packing, the title complex molecules form an approximately linear arrangement extending along both a and 6. TGA showed that 1 is decomposed in two close steps to produce ZnS as identified by residual weight. The complex 1 crystallizes in the monoclinic space group C2 cwithcellparameters: a=22.021(5), 6=22.215(3), c= 17.537(2) A, p=93.49(2)", V = 8563(3) i3 and 2 = 8 . The structure was refined by full-matrix least-squares methods to R = 0.067, Rw = 0.1 14.