206880-67-3Relevant articles and documents
Synthesis and characterization of d2 imido complexes of molybdenum. Crystal structure of [MoCl2{N(mes)}(PhC≡CPh)-(PMe3) 2]·0.5PhC≡CPh (mes = 2,4,6-trimethylphenyl)
Montilla, Francisco,Galindo, Agustin,Carmona, Ernesto,Gutierrez-Puebla, Enrique,Monge, Angeles
, p. 1299 - 1305 (2007/10/03)
The compound [MoCl2{N(mes)}(PMe3)3] 1 (mes = 2,4,6-trimethylphenyl) has been prepared by the reaction of [MoCl3{N(mes)}(dme)] (dme = 1,2-dimethoxyethane) with 2 equivalents of PMe3 and subsequent sodium amalgam reduction, in the presence of 1 additional equivalent of PMe3. Metathesis reactions of 1 with KX gave [MoX2{N(mes)}(PMe3)3] (X = Br 2 or NCS 3), whereas the anionic bidentate PriOCS2- ligand produced the monophosphine compound (Mo{N(mes)}(S2COPri)2(PMe3)] 4. Substitution of two of the PMe3 ligands to give [MoCl2{N(mes)}(PMe3)(depe)] 5 (depe = Et2PCH2CH2PEt2) is also feasible, whilst phosphites and other π acceptors provided the corresponding [MoCl2{N(mes)}L(PMe3)2] compounds [L = P(OMe)3 6, P(OCH2)3-CCH2CH3 7, C2H4 8, H2C=CHCO2Me 9, CO 10, CNBut 11, CNMe 12, PhC≡CH 13 or PhC≡CPh 14] by substitution of the unique PMe3 group of 1. Some of these arylimido complexes exhibit dynamic behaviour in solution, due to restricted rotation of the aryl group around the C-N bond. The molecular structure of 14 (as its PhC≡CPh hemisolvate, i.e. 14·0.5PhC≡CPh) has been determined by an X-ray study.