 Already in 1858, "stannic ethyl" was formulated as a polymeric compound denoted with the composition n(SnC4H5).In 1917 Grüttner, who reinvestigated results on hexaethyl-distannanes(H5C2)3Sn-Sn(C2H5)3 (reported by Ladenburg in 1870) confirmed the presence of Sn-Sn bonds and predicated for the first time that tin could form chain like compounds.In 1943, it was postulated that “diphenyltin” exists as a type of polymeric material because of its yellow color [8], and indeed a bathochromic shift of the wavelength at maximum absorption with increasing number of Sn atoms was found later in the case of oligo(dibutylstannane)s comprising up to 15 Sn atoms.