Journal ArticleDOI
Anionic Polymerization of Acrylic Monomers. 14. Carbon-13 and Lithium-7 NMR Characterization of the Complexation of Methyl .alpha.-Lithioisobutyrate with Various Lithium Cation-Binding Ligands in Tetrahydrofuran
TLDR
In this paper, the aggregation equilibrium and electronic structure of methyl α-lithioisobutyrate (MIBLi), a monomeric model structurally corresponding to a living poly(methyl methacrylate) chain end associated with a lithium countercation, has been examined by 7 Li and/or 13 C NMR spectroscopy in THF in the presence of various lithium cation-binding ligands.Abstract:
The aggregation equilibrium and electronic structure of methyl α-lithioisobutyrate (MIBLi), a monomeric model structurally corresponding to a living poly(methyl methacrylate) chain end associated with a lithium countercation, has been examined by 7 Li and/or 13 C NMR spectroscopy in THF in the presence of various lithium cation-binding ligands. The addition of dimethoxyethane (DME), triglyme (glyme-3), 12-crown-4 (12-CE-4), and hexamethylphosphoric triamide (HMPA) to coexisting tetrameric and dimeric MIBLi in THF induces an increase in dimeric population in the order DME< glyme-3< 12-CE-4< HMPAread more
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Journal ArticleDOI
Glyme−Lithium Salt Phase Behavior
TL;DR: The phase diagrams clearly illustrate how solvate formation and thermophysical properties are dictated by the ionic association strength of the salt and chain length of the solvating molecules.
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Mixed AggregAte (MAA): A Single Concept for All Dipolar Organometallic Aggregates. 1. Structural Data
TL;DR: Organometallic Aggregates.
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Glymes as versatile solvents for chemical reactions and processes: from the laboratory to industry
Shaokun Tang,Hua Zhao +1 more
TL;DR: Glymes, also known as glycol diethers, are saturated non-cyclic polyethers containing no other functional groups that are found in a broad range of laboratory applications including organic synthesis, electrochemistry, biocatalysis, materials, and Chemical Vapor Deposition (CVD).
Journal ArticleDOI
Group Transfer Polymerization of (Meth)acrylic Monomers Catalyzed by N-Heterocyclic Carbenes and Synthesis of All Acrylic Block Copolymers: Evidence for an Associative Mechanism
TL;DR: N-Heterocyclic carbenes (NHCs) namely, 1,3-bis-(diisopropyl)imidazol-2-ylidene (1) and 1, 3-bis(di-tert-butyl)IMIDazol -2-YLIDene (2) were employed as neutral organocatalysts to bring about the grou...