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Iminophosphorane Neodymium(III) Complexes As Efficient Initiators for Lactide Polymerization

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Iminophosphorane Neodymium(III) Complexes As Efficient Initiators for Lactide Polymerization. / Buchard, Antoine; Platel, Rachel H.; Auffrant, Audrey et al.
In: Organometallics, Vol. 29, No. 13, 12.07.2010, p. 2892-2900.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Buchard, A, Platel, RH, Auffrant, A, Le Goff, XF, Le Floch, P & Williams, CK 2010, 'Iminophosphorane Neodymium(III) Complexes As Efficient Initiators for Lactide Polymerization', Organometallics, vol. 29, no. 13, pp. 2892-2900. https://doi.org/10.1021/om1001233

APA

Buchard, A., Platel, R. H., Auffrant, A., Le Goff, X. F., Le Floch, P., & Williams, C. K. (2010). Iminophosphorane Neodymium(III) Complexes As Efficient Initiators for Lactide Polymerization. Organometallics, 29(13), 2892-2900. https://doi.org/10.1021/om1001233

Vancouver

Buchard A, Platel RH, Auffrant A, Le Goff XF, Le Floch P, Williams CK. Iminophosphorane Neodymium(III) Complexes As Efficient Initiators for Lactide Polymerization. Organometallics. 2010 Jul 12;29(13):2892-2900. doi: 10.1021/om1001233

Author

Buchard, Antoine ; Platel, Rachel H. ; Auffrant, Audrey et al. / Iminophosphorane Neodymium(III) Complexes As Efficient Initiators for Lactide Polymerization. In: Organometallics. 2010 ; Vol. 29, No. 13. pp. 2892-2900.

Bibtex

@article{9e3d5f67c51c42858e4edba8b697e754,
title = "Iminophosphorane Neodymium(III) Complexes As Efficient Initiators for Lactide Polymerization",
abstract = "Bis(iminophosphoranyl)methanide ({CH(PPh(2)NR)}(-), R = iPr or Ph) neodymium(III) complexes were prepared from NdI(3)(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(PPh(2)NiPr)(2)}{CH(PPh(2)NiPr)(2)}] and externally added iPrOH was also an unexpected catalyst for the ROP of lactide.",
keywords = "LIGAND SYNTHESIS, CYCLIC ESTERS, YTTRIUM COMPLEXES, ALUMINUM COMPLEXES, ALKOXIDE INITIATORS, EPSILON-CAPROLACTONE, GROUP-3 METAL-COMPLEXES, RACEMIC LACTIDE, RAC-LACTIDE, RING-OPENING POLYMERIZATION",
author = "Antoine Buchard and Platel, {Rachel H.} and Audrey Auffrant and {Le Goff}, {Xavier F.} and {Le Floch}, Pascal and Williams, {Charlotte K.}",
year = "2010",
month = jul,
day = "12",
doi = "10.1021/om1001233",
language = "English",
volume = "29",
pages = "2892--2900",
journal = "Organometallics",
issn = "0276-7333",
publisher = "American Chemical Society",
number = "13",

}

RIS

TY - JOUR

T1 - Iminophosphorane Neodymium(III) Complexes As Efficient Initiators for Lactide Polymerization

AU - Buchard, Antoine

AU - Platel, Rachel H.

AU - Auffrant, Audrey

AU - Le Goff, Xavier F.

AU - Le Floch, Pascal

AU - Williams, Charlotte K.

PY - 2010/7/12

Y1 - 2010/7/12

N2 - Bis(iminophosphoranyl)methanide ({CH(PPh(2)NR)}(-), R = iPr or Ph) neodymium(III) complexes were prepared from NdI(3)(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(PPh(2)NiPr)(2)}{CH(PPh(2)NiPr)(2)}] and externally added iPrOH was also an unexpected catalyst for the ROP of lactide.

AB - Bis(iminophosphoranyl)methanide ({CH(PPh(2)NR)}(-), R = iPr or Ph) neodymium(III) complexes were prepared from NdI(3)(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(PPh(2)NiPr)(2)}{CH(PPh(2)NiPr)(2)}] and externally added iPrOH was also an unexpected catalyst for the ROP of lactide.

KW - LIGAND SYNTHESIS

KW - CYCLIC ESTERS

KW - YTTRIUM COMPLEXES

KW - ALUMINUM COMPLEXES

KW - ALKOXIDE INITIATORS

KW - EPSILON-CAPROLACTONE

KW - GROUP-3 METAL-COMPLEXES

KW - RACEMIC LACTIDE

KW - RAC-LACTIDE

KW - RING-OPENING POLYMERIZATION

U2 - 10.1021/om1001233

DO - 10.1021/om1001233

M3 - Journal article

VL - 29

SP - 2892

EP - 2900

JO - Organometallics

JF - Organometallics

SN - 0276-7333

IS - 13

ER -