Substitution reaction of triphenylphosphine oxide with rare-earth metal phosphido methyl complexes†
Abstract
Rare-earth metal phosphido methyl complexes, [LLn(Me){P(H)Ar}] (L = [MeC{N(DIPP)}CHC(Me)(NCH2CH2NMe2)]−, DIPP = 2,6-iPr2C6H3; 1: Ln = Sc, Ar = 2,4,6-tBu3C6H2; 2: Ln = Sc, Ar = 2,6-iPr2C6H3; 3: Ln = Sc, Ar = 2,6-Me2C6H3; 4: Ln = Lu, Ar = 2,4,6-tBu3C6H2; 5: Ln = Lu, Ar = 2,6-iPr2C6H3), were synthesized and characterized. Complexes 1–5 reacted with triphenylphosphine oxide (Ph3PO) to give [LLn(Ph){CH2P(O)Ph2}] (Ln = Sc(6), Lu(7)), by a mechanism that includes C(alkyl)–P bond formation and C(aryl)–P bond cleavage. The molecular structures of 1, 3 and 7 were determined by single-crystal X-ray diffraction. A pathway for the formation of 6 and 7 was suggested.
- This article is part of the themed collection: Frontiers of Organo-f-Element Chemistry