Reactions of 1,1,3,3-tetrakis(dimethylamino)-1λ5,3λ5-diphosphete with diphenylchlorophosphane and methyl iodide

✍ Scribed by Fred Rosche; Gernot Heckmann; Ekkehard Fluck; Bernhard Neumüller

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 618 KB
• Volume: 7
• Category: Article
• ISSN: 1042-7163
• DOI: 10.1002/(sici)1098-1071(199610)7:5<341::aid-hc9>3.0.co;2-e

✦ Synopsis

1, I , 3,3-Tetrakis (dimethylamino)-I k5,3k5-diphosphete, 1, reacts with diphenylchlorophosphane to yield I , I , 33tetrakis (dimethylamino)-4-diphenylphos-phany1-I,2-dihydro-3k5-[1,3]diphosphetium chloride, 2, or, depending on the reaction conditions, the isomer compound 3. The cation of 2 is deprotonated by LiN[Si(CH.JJ2 to give the diphenylphosphanyl-substituted derivative of 1, i.e., compound 4. Methyl iodide adds to 1 to form I , 1,3,3]diphosphetium iodide, 6. Deprotonation of 6 with n-butyllithium leads to the monomethyl derivative of 1, i.e., compound 7. Physical properties, N M R spectra, and mass spectra of compounds 2-4, 6, and 7 are described. The results of the X-ray structural analysis of 6 are reported and discussed.