2,4-N,N′-Bis(dialkylamido)-2,4-dithioxo-1,3,2λ5,4λ5-dithiadiphosphetanes

• Published in: European journal of inorganic chemistry Vol. 2004; no. 19; pp. 3842 - 3845
• Main Authors: Dimitrov, Anton, Hartwich, Irmgard, Neubauer, Petra, Meisel, Manfred
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.10.2004; WILEY‐VCH Verlag
• Subjects: Donor-acceptor systems; Fluorinated ligands; N-ligands; Phosphorus; Sulfur
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.200400343

Dialkylamide derivatives of the monometadithioxaphosphoric acid stabilised by pyridine as a donor, i.e. [(C5H5N)PS2NR2], readily react with AlCl3. The elimination of the donor and formation of the adduct C5H5N·AlCl3 liberates the unstable σ3λ5‐phosphoranes (PS2NR2). The latter are stabilised by [2+2] “cycloaddition‐dimerization” leading to the title compounds [PS2NR2]2 in nearly quantitative yields. The synthesis and characterisation of two compounds possessing NR2 substituents of very different basicities clearly demonstrate the generalisation of such a procedure as an easy way of accessing further derivatives in this class. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)