Stereoselective Cationic Polymerization of Prochiral Monomers

Explore stereoselective cationic polymerization of prochiral monomers in this 49-minute webinar presented by Prof. Frank Leibfarth from the NSF Center for Integrated Catalysis. Delve into fundamental knowledge related to integrated catalysis, covering topics such as stereochemistry's impact on emergent properties, canonical methods for controlling polymer stereochemistry, and mechanisms for stereoinduction in olefin polymerization. Learn about a novel approach using chiral counterions and Lewis acids to control stereochemistry in vinyl ether polymerization. Examine catalyst substitution effects, reaction condition optimization, and proposed mechanisms for stereoselective cationic polymerization. Investigate kinetics, Arrhenius analysis, and computational studies revealing catalyst structure. Discover how stereocontrol imparts emergent mechanical properties and explore improvements in catalyst design for new reactivity. Discuss the potential of chiral counterion catalysis as a general approach and the control of polymer configuration to conformation. Gain insights into improving isotacticity through ligand modification and investigate the source of high stereoselectivity, including proposed stereodetermining steps and the importance of first monomer propagation in determining helicity.

Intro
STEREOCHEMISTRY LEADS TO EMERGENT PROPERTIES
CANONICAL METHODS TO CONTROL POLYMER STEREOCHEMISTRY
MECHANISM FOR STEREOINDUCTION IN OLEFIN POLYMERIZATION
A NEW APPROACH: STEREOSELECTIVE CATIONIC POLYMERIZATION
USING CHIRAL COUNTERIONS TO CONTROL STEREOCHEMISTRY
PREMIER METHOD FOR STEREOCONTROLLED VINYL ETHER POLYMERIZATION
CHIRAL LEWIS ACIDS & STEREOSELECTIVE POLYMERIZATION
CATALYST SUBSTITUTION MATTERS
OPTIMIZATION OF REACTION CONDITIONS IMPROVES ISOTACTICITY
A GENERAL METHOD FOR THE SYNTHESIS OF ISOTACTIC PVES
CHIRAL COUNTER-ION APPROACH ENABLES CATALYST CONTROL
PROPOSED MECHANISM OF STEREOSELECTIVE CATIONIC POLYMERIZATION
KINETICS REVEAL LIGAND EFFECTS
ARRHENIUS ANALYSIS QUANTITATES KINETICS OF POLYMERIZATION
CATALYST SOLUTION STRUCTURE IS A MYSTERY
COMPUTATIONAL ANALYSIS REVEALS A PROPOSED STRUCTURE
STEREOCONTROL IMPARTS EMERGENT MECHANICAL PROPERTIES
IMPROVEMENTS IN CATALYST DESIGN TO FACILITATE NEW REACTIVITY
CHAIN TRANSFER AGENTS ENABLE LOW CATALYST LOADING
IS CHIRAL COUNTERION CATALYSIS A GENERAL APPROACH?
CONTROLLING POLYMER CONFIGURATION TO CONFORMATION
IMPROVING ISOTACTICITY THROUGH LIGAND MODIFICATION
INVESTIGATING THE SOURCE OF HIGH STEREOSELECTIVITY
PROPOSED STEREODETERMINING STEPS
FIRST MONOMER PROPAGATION DETERMINES HELICITY