TY - JOUR
T1 - Highly efficient monocationic palladacycles of chelating diphosphines in C2H4/CO copolymerization
AU - Schwarz, Jürgen
AU - Herdtweck, Eberhardt
AU - Herrmann, Wolfgang A.
AU - Gardiner, Michael G.
PY - 2000/8/7
Y1 - 2000/8/7
N2 - Cationic palladacycles of the general formula [{o-C6H4(CH2)N(R)2Pd(P̌P)}][X] (P̌P = Ph2P(CH2)3PPh2, (PhCH2)2C(CH2PPh2)2; X = Cl, PF6) B(C6H5)4; R = H, CH3, CH2C6H5) and [{o-(CH2)C6H4P(o-Tol) 2Pd(P̌P)}][X] (P̌P = Ph2P(CH2)3PPh2; X = Cl, PF6) have been prepared and structurally characterized in the former case (X-ray structure analysis for X = PF6, R = CH3). They are resistant to air and moisture, both in solution and the solid state, and represent one of the most active single-component catalyst systems for the perfectly alternating C2H4/CO copolymerization in aprotic solvents. Stoichiometric model reactions provide insight into the mechanism, suggesting that insertion of carbon monoxide into the carbon-palladium(II) bond initiates the catalytic cycle.
AB - Cationic palladacycles of the general formula [{o-C6H4(CH2)N(R)2Pd(P̌P)}][X] (P̌P = Ph2P(CH2)3PPh2, (PhCH2)2C(CH2PPh2)2; X = Cl, PF6) B(C6H5)4; R = H, CH3, CH2C6H5) and [{o-(CH2)C6H4P(o-Tol) 2Pd(P̌P)}][X] (P̌P = Ph2P(CH2)3PPh2; X = Cl, PF6) have been prepared and structurally characterized in the former case (X-ray structure analysis for X = PF6, R = CH3). They are resistant to air and moisture, both in solution and the solid state, and represent one of the most active single-component catalyst systems for the perfectly alternating C2H4/CO copolymerization in aprotic solvents. Stoichiometric model reactions provide insight into the mechanism, suggesting that insertion of carbon monoxide into the carbon-palladium(II) bond initiates the catalytic cycle.
UR - http://www.scopus.com/inward/record.url?scp=0000494068&partnerID=8YFLogxK
U2 - 10.1021/om0000212
DO - 10.1021/om0000212
M3 - Article
AN - SCOPUS:0000494068
SN - 0276-7333
VL - 19
SP - 3154
EP - 3160
JO - Organometallics
JF - Organometallics
IS - 16
ER -