Synthesis and spectroscopic properties of diarylpolyselanes R 2Se x (x = 2–7) and of diaryldiselenapolysulphanes (RSe) 2Sy (y = 1–15) with R = 4-Cl-C 6H 4

• Published in: Polyhedron Vol. 12; no. 21; pp. 2577 - 2585
• Main Authors: Pridöhl, Markus, Steudel, Ralf, Baumgart, Frank
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 1993
• ISSN: 0277-5387
• DOI: 10.1016/S0277-5387(00)80084-4

Reaction of RSeCl (R = 4-Cl-C 6H 4) with titanocene pentasulphide Cp 2TiS 5 affords the novel RSeS 5SeR as a yellow oil which is quite stable at 20°C. Using Cp 4′Ti 2S 4 (Cp′ = CH 3C 5H 4) as a sulphur transfer reagent the reaction with RSeCl results in a mixture of (RSe) 2S n molecules with n = 0–10, which on heating produces even longer chains as demonstrated by HPLC analysis. Titanocene pentaselenide Cp 2TiSe 5 reacts with RSeCl at 4°C to give a mixture of R 2Se x molecules (x = 1–7) and Se 8, the relative concentrations sharply decrease with increasing x. 77Se NMR and UV spectra as well as retention index data of the new molecules are reported.