TY - JOUR
T1 - Polymerization of norbomene by palladium(II) complexes bearing ethylene-bridged bisindolinyl- or bis(1,2,3,4-tetrahydroquinolinyl) ligands
AU - Abu-Surrah, Adnan S.
AU - Rieger, Bernhard
N1 - Funding Information:
The work of A.S.A.-S. was made possible by the award of a DAAD Ph.D. scholarship. We thank the DFG (SFB 239, project F11), the BMBF and the Polymer Laboratory of BASF Aktiengesellschaft, Ludwigshafen for generous financial support.
PY - 1998/2/27
Y1 - 1998/2/27
N2 - Novel moisture and air stable, cationic palladium(II) amine complexes (1-4) of the general type [Pd(N μ N)(X)2](BF4)2, [N μ N = 1,2-bis(N-indolinyl)ethane (BIE) 1, 3; 1,2-bis(N-l,2,3,4-tetrahydroquinolinyl)ethane (BTQE) 2, 4; X = NCCH3, H2O] were found to catalyze the polymerization reaction of bicyclo[2.2.1]hept-2-ene at room temperature. The amorphous polymer products consist of 2,3-linked norbornene units; no indications for ring opened species could be observed. The polymerization activity of the diaqua-complexes 3, 4 is superior compared to their acetonitrile analogues due to a facile activation by a Wacker-type reaction. The cationic Pd(II)-compounds are inactive towards homo- and copolymerization reactions of polar monomers, like acrylates or carbon monoxide. However, addition of methylacrylate resulted in polynorbomene products with increased molecular weight and narrow molecular weight distributions.
AB - Novel moisture and air stable, cationic palladium(II) amine complexes (1-4) of the general type [Pd(N μ N)(X)2](BF4)2, [N μ N = 1,2-bis(N-indolinyl)ethane (BIE) 1, 3; 1,2-bis(N-l,2,3,4-tetrahydroquinolinyl)ethane (BTQE) 2, 4; X = NCCH3, H2O] were found to catalyze the polymerization reaction of bicyclo[2.2.1]hept-2-ene at room temperature. The amorphous polymer products consist of 2,3-linked norbornene units; no indications for ring opened species could be observed. The polymerization activity of the diaqua-complexes 3, 4 is superior compared to their acetonitrile analogues due to a facile activation by a Wacker-type reaction. The cationic Pd(II)-compounds are inactive towards homo- and copolymerization reactions of polar monomers, like acrylates or carbon monoxide. However, addition of methylacrylate resulted in polynorbomene products with increased molecular weight and narrow molecular weight distributions.
UR - http://www.scopus.com/inward/record.url?scp=0032570930&partnerID=8YFLogxK
U2 - 10.1016/S1381-1169(97)00177-5
DO - 10.1016/S1381-1169(97)00177-5
M3 - Article
AN - SCOPUS:0032570930
SN - 1381-1169
VL - 128
SP - 239
EP - 243
JO - Journal of Molecular Catalysis A: Chemical
JF - Journal of Molecular Catalysis A: Chemical
IS - 1-3
ER -