138784-89-1Relevant academic research and scientific papers
Synthesis of (indenylidene)phosphoranes - A novel class of ligand precursors for main-group and transition metal organometallics
Rufanov, Konstantin A.,Ziemer, Burkhard,Hummert, Markus,Schutte, Stefan
, p. 4759 - 4763 (2004)
IndPPh2 (1) reacts with RCH2Br to form the phosphonium salts [RCH2P(Ph)2Ind]+Br - (2: R = Ph; 3: R = C6F5) in high yields. Oxidation of 1 with H2O2 in THF proceeds smoothly to give the phosphane oxide IndP(O)Ph2 (4). Dehydrobromination of 2 and 3 with NaH in THF yields the corresponding indenylidenephosphoranes C 9H6=P(Ph)2CH2R (5: R = Ph; 6: R = C6F5). Further deprotonation of 6 with excess NaH results in formation of sodium 1-{[(pentafluorophenyl)methylidene]diphenylphosphoranyl} indenide (7), isolated as a solvate with three THF molecules. A detailed NMR study of new ligand precursors and X-ray structure studies of 5 and 7 have been accomplished. A short F→Na coordination contact in the molecular structure of 7 has been detected. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.
