TY - JOUR
T1 - Polymerisations of ε-caprolactone and β-butyrolactone with Zn-, Al- and Mg-based organometallic complexes
AU - Majoumo-Mbe, Félicité
AU - Smolensky, Elena
AU - Lönnecke, Peter
AU - Shpasser, Dina
AU - Eisen, Moris S.
AU - Hey-Hawkins, Evamarie
N1 - Funding Information:
We gratefully acknowledge financial support from the German-Israeli-Foundation (grant no. I-621-27.5/1999) and we thank WITCO GmbH for providing EtAlCl 2 and butyloctylmagnesium.
PY - 2005/10/3
Y1 - 2005/10/3
N2 - The reaction of EtAlCl2 with 1,2-{LiN(PMes2)} 2C6H4 (Mes = 2,4,6-Me3C 6H2) and of butyloctylmagnesium with 1,2-{NH(PPh 2)}2C6H4 gave [AlEt(1,2-{N(PMes 2)}2C6H4-κ2N, N′)(THF)] (1) and [Mg(1,2-{N(PPh2)}2C 6H4-κ2N,N′)(THF)2] (2), respectively. Complexes 1 and 2 were fully characterised by NMR (1H, 13C, 31P) and IR spectroscopy and mass spectrometry. Complexes 1 and 2 were employed as catalysts in the polymerisation of ε-caprolactone, which produced polymers with a narrow molecular weight distribution. For comparison the polymerisations of ε-caprolactone and β-butyrolactone were carried out with the Zn complex [ZnPr{1-N(PMes 2)-2-N(PHMes2)C6H4- κ2N,N′}] (3) as catalyst, which produced polymers with narrow molecular weight distributions and high molecular weights.
AB - The reaction of EtAlCl2 with 1,2-{LiN(PMes2)} 2C6H4 (Mes = 2,4,6-Me3C 6H2) and of butyloctylmagnesium with 1,2-{NH(PPh 2)}2C6H4 gave [AlEt(1,2-{N(PMes 2)}2C6H4-κ2N, N′)(THF)] (1) and [Mg(1,2-{N(PPh2)}2C 6H4-κ2N,N′)(THF)2] (2), respectively. Complexes 1 and 2 were fully characterised by NMR (1H, 13C, 31P) and IR spectroscopy and mass spectrometry. Complexes 1 and 2 were employed as catalysts in the polymerisation of ε-caprolactone, which produced polymers with a narrow molecular weight distribution. For comparison the polymerisations of ε-caprolactone and β-butyrolactone were carried out with the Zn complex [ZnPr{1-N(PMes 2)-2-N(PHMes2)C6H4- κ2N,N′}] (3) as catalyst, which produced polymers with narrow molecular weight distributions and high molecular weights.
KW - Aluminium bisamido complex
KW - Magnesium bisamido complex
KW - Molecular structures
KW - Polymerisation of ε-caprolactone and β-butyrolactone
UR - http://www.scopus.com/inward/record.url?scp=24144445678&partnerID=8YFLogxK
U2 - 10.1016/j.molcata.2005.06.037
DO - 10.1016/j.molcata.2005.06.037
M3 - 文章
AN - SCOPUS:24144445678
SN - 1381-1169
VL - 240
SP - 91
EP - 98
JO - Journal of Molecular Catalysis A: Chemical
JF - Journal of Molecular Catalysis A: Chemical
IS - 1-2
ER -