Novel Tetraphosphabarrelene and -semibullvalene Derivatives by Reactions of 2,4,6-Tri-tert-butyl-1,3,5-triphosphabenzene with Phosphaalkynes☆

✍ Scribed by Paul Binger; Stefanie Stutzmann; Joachim Bruckmann; Carl Krüger; Joseph Grobe; Duc Le Van; Torsten Pohlmeyer

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 128 KB
• Volume: 1998
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/(sici)1099-0682(199812)1998:12<2071::aid-ejic2071>3.0.co;2-m

✦ Synopsis

6-Tri-tert-butyl-1,3,5-triphosphabenzene 4 reacts with to the 1,3,4,7-tetraphosphasemibullvalene derivative 10 as the only product. The single-crystal X-ray analysis of 10 phosphaalkynes PϵCϪR [R = tBu (5a), tPen (5b)] at room temperature in a formal [4 + 2] cycloaddition to yield the exhibits a diphosphirane unit with a very long PP distance of 2.274(1) A ˚together with a large extension of the PCP angle corresponding 1,3,5,7-tetraphosphabarrelene derivatives 8a and 8b, respectively. The analogous reaction of 4 with the in the three-membered ring to 75.3(1)°. aminophosphaethyne PϵCϪN(iPr) 2 (9) unexpectedly leads lautern, Erwin-Schrödinger-Straße, D-67663 Kaiserslautern, Germany;