7302-14-9Relevant academic research and scientific papers
A new and convenient approach towards bis(iminophosphoranyl)methane ligands and their dicationic, cationic, anionic and dianionic derivatives
Demange, Matthieu,Boubekeur, Leila,Auffrant, Audrey,Mezailles, Nicolas,Ricard, Louis,Le Goff, Xavier,Le Floch, Pascal
, p. 1745 - 1754 (2006)
The availability of bis(aminophosphoranes) 2a-c through a straightforward synthesis yielded access to a whole family of N,N ligands via sequential deprotonation. The obtained cationic 3a-c, neutral 4a-c, anionic 5a-c and dianionic 6a-c compounds were full
Iminophosphorane neodymium(III) complexes as efficient initiators for lactide polymerization
Buchard, Antoine,Platel, Rachel H.,Auffrant, Audrey,Le Goff, Xavier F.,Floch, Pascal Le,Williams, Charlotte K.
scheme or table, p. 2892 - 2900 (2010/10/03)
Bis(iminophosphoranyl)methanide ({CH(PPh2NR)}-, R = iPr or Ph) neodymium(III) complexes were prepared from NdI3(THF) 3.5. The steric bulk of the ligand controlled the stoichiometry of the resulting complexes. Thus, three new complexes, bearing one or two ancillary ligands, were prepared and characterized using various spectroscopic techniques and by single-crystal X-ray diffraction. Reaction of the heteroleptic neodymium iodide complexes with amido groups yielded viable initiators for the ring-opening polymerization of lactide. The polymerizations were conducted using either the heteroleptic neodymium amido complexes or the in situ generated alkoxide complexes. Using such conditions, the neodymium complexes showed very fast and well-controlled polymerizations, with complete conversion being obtained in only a few minutes and yielding polylactide with controlled molecular weight and narrow polydispersity index. An initiating system comprising a rare neodymium-alkyl-carbene complex [Nd{C(PPh2NiPr) 2}{CH(PPh2NiPr)2}] and externally added iPrOH was also an unexpected catalyst for the ROP of lactide.
Sterically hindered iminophosphorane complexes of vanadium, iron, cobalt and nickel: a synthetic, structural and catalytic study
Al-Benna, Sarah,Sarsfield, Mark J.,Thornton-Pett, Mark,Ormsby, Daniel L.,Maddox, Peter J.,Bres, Philippe,Bochmann, Manfred
, p. 4247 - 4257 (2007/10/03)
Bis(aryliminophosphoranyl)alkanes L1 = (CH2)n(R12P=NR2)2 (n = 1 or 2, R1 = Ph or Me, R2 = Ph, C6H2Me3-2,4,6 or C6H3Pri2-2,6) reacted with cobalt and nickel dihalides to give chelate complex
