Matches in SemOpenAlex for { <https://semopenalex.org/work/W2085295502> ?p ?o ?g. }
- W2085295502 endingPage "6919" @default.
- W2085295502 startingPage "6910" @default.
- W2085295502 abstract "This contribution reports a combined experimental (with kinetics and tangible effects on syndioselectivity) and theoretical (with density functional theory) study of (CGC)M catalysts [M = Ti, Zr; CGC = Me2Si(η5-Me4C5)(tBuN)], addressing a need for a fundamental understanding of the stereoselectivity observed for such catalysts in polymerization of methyl methacrylate (MMA) and an explanation for the chain-end control nature of the syndioselective MMA polymerization by the chiral (CGC)Ti catalyst. The living/controlled MMA polymerization by (CGC)TiMe+MeB(C6F5)3− (1) follows the zero-order kinetics in [MMA], implying a faster ring-opening process of the cyclic chelate relative to MMA addition within the catalyst−monomer complex in a unimetallic propagation cycle. The syndioselectivity of 1 is insensitive to monomer and catalyst concentrations as well as to ion-pairing strength varied with counterion structure and solvent polarity. Comparative studies using identical (CGC)M bis(isopropyl ester enolate) structures show that the (CGC)Ti system exhibits noticeably higher syndioselectivity than the isostructural Zr system at ambient temperature. Density functional calculations rationalize the higher syndioselectivity observed for the (CGC)Ti catalyst and lend a theoretical support for the mechanism of MMA- or counterion-assisted catalyst site epimerization after a stereomistake, which accounts for the formation of the predominately isolated m stereoerrors." @default.
- W2085295502 created "2016-06-24" @default.
- W2085295502 creator A5012892372 @default.
- W2085295502 creator A5018137652 @default.
- W2085295502 creator A5053222658 @default.
- W2085295502 creator A5065236891 @default.
- W2085295502 creator A5071602217 @default.
- W2085295502 creator A5089491313 @default.
- W2085295502 date "2008-09-09" @default.
- W2085295502 modified "2023-10-14" @default.
- W2085295502 title "Syndioselective MMA Polymerization by Group 4 Constrained Geometry Catalysts: A Combined Experimental and Theoretical Study" @default.
- W2085295502 cites W1547469144 @default.
- W2085295502 cites W1964936863 @default.
- W2085295502 cites W1968320157 @default.
- W2085295502 cites W1969952810 @default.
- W2085295502 cites W1974254530 @default.
- W2085295502 cites W1975357676 @default.
- W2085295502 cites W1975370635 @default.
- W2085295502 cites W1978402872 @default.
- W2085295502 cites W1980132674 @default.
- W2085295502 cites W1980577448 @default.
- W2085295502 cites W1981786148 @default.
- W2085295502 cites W1983578535 @default.
- W2085295502 cites W1985013698 @default.
- W2085295502 cites W1985370172 @default.
- W2085295502 cites W1986178312 @default.
- W2085295502 cites W1986632875 @default.
- W2085295502 cites W1988091937 @default.
- W2085295502 cites W1988991679 @default.
- W2085295502 cites W1992033742 @default.
- W2085295502 cites W1993023761 @default.
- W2085295502 cites W1997331113 @default.
- W2085295502 cites W1998590651 @default.
- W2085295502 cites W1999566194 @default.
- W2085295502 cites W1999917538 @default.
- W2085295502 cites W2002788226 @default.
- W2085295502 cites W2004234090 @default.
- W2085295502 cites W2006388392 @default.
- W2085295502 cites W2008445336 @default.
- W2085295502 cites W2012555156 @default.
- W2085295502 cites W2017308362 @default.
- W2085295502 cites W2017945257 @default.
- W2085295502 cites W2019066397 @default.
- W2085295502 cites W2019745185 @default.
- W2085295502 cites W2020478549 @default.
- W2085295502 cites W2020558302 @default.
- W2085295502 cites W2020873478 @default.
- W2085295502 cites W2024395848 @default.
- W2085295502 cites W2026794860 @default.
- W2085295502 cites W2027534637 @default.
- W2085295502 cites W2028022118 @default.
- W2085295502 cites W2030687437 @default.
- W2085295502 cites W2031568353 @default.
- W2085295502 cites W2032380370 @default.
- W2085295502 cites W2033341416 @default.
- W2085295502 cites W2034857424 @default.
- W2085295502 cites W2036078890 @default.
- W2085295502 cites W2036573494 @default.
- W2085295502 cites W2036602289 @default.
- W2085295502 cites W2038193875 @default.
- W2085295502 cites W2038533471 @default.
- W2085295502 cites W2041203413 @default.
- W2085295502 cites W2044687149 @default.
- W2085295502 cites W2045236427 @default.
- W2085295502 cites W2047260106 @default.
- W2085295502 cites W2049344050 @default.
- W2085295502 cites W2049421382 @default.
- W2085295502 cites W2050328374 @default.
- W2085295502 cites W2051352696 @default.
- W2085295502 cites W2051581031 @default.
- W2085295502 cites W2052563263 @default.
- W2085295502 cites W2055230539 @default.
- W2085295502 cites W2055563809 @default.
- W2085295502 cites W2058250623 @default.
- W2085295502 cites W2058337088 @default.
- W2085295502 cites W2059747135 @default.
- W2085295502 cites W2063301255 @default.
- W2085295502 cites W2065357026 @default.
- W2085295502 cites W2066359826 @default.
- W2085295502 cites W2066730861 @default.
- W2085295502 cites W2067306308 @default.
- W2085295502 cites W2068054822 @default.
- W2085295502 cites W2071533879 @default.
- W2085295502 cites W2082538461 @default.
- W2085295502 cites W2082982662 @default.
- W2085295502 cites W2085385315 @default.
- W2085295502 cites W2086288648 @default.
- W2085295502 cites W2086541351 @default.
- W2085295502 cites W2086957099 @default.
- W2085295502 cites W2087833011 @default.
- W2085295502 cites W2089748107 @default.
- W2085295502 cites W2089878884 @default.
- W2085295502 cites W2089916650 @default.
- W2085295502 cites W2090970147 @default.
- W2085295502 cites W2091382664 @default.
- W2085295502 cites W2092835997 @default.
- W2085295502 cites W2092914206 @default.
- W2085295502 cites W2095337944 @default.