Reaction of the Phosphenium Complexes Cp(OC)2W=P(tBu)(R) with Ethyl Isothiocyanate: Unprecedented Formation of the Phosphametalla Spiro Compound {Cp(OC)2W–P(tBu)(R)–N(Et)–Ca[N(Et)–(CH)–N(Et)CbH2]–S(W–S)(Ca–Cb)}Cl (R = tBu, Ph)

✍ Scribed by Wolfgang Malisch; Christa Abd El Baky; Klaus Grün; Joachim Reising

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 122 KB
• Volume: 1998
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/(sici)1099-0682(199812)1998:12<1945::aid-ejic1945>3.0.co;2-q

✦ Synopsis

Reaction of the phosphenium complexes Cp(OC) 2 W=P-generated from Cp(OC) 2 [H(tBu)(R)P]W-Cl (1a, b) with DBU in the presence of 3 leads to the spirocyclic phosphorus metal (tBu)(R) [R = tBu (2a), Ph (2b)] with ethyl isothiocyanate (3) leads to the formation of the phosphametallacycles compounds {Cp(OC) 2 W-P(tBu ,b). The structure of 6a has Cp(OC) 2 W-P(tBu)(R)-C(=NEt)-S(W-S) (4a, b) by [2 + 2] cycloaddition. In contrast, the "in situ" reaction of 2a, b, been proved by X-ray analysis.