Electron propagator affinity from

Electron transfer from polycyclic aromatic radical anions in polar solvents can also initiate propagation.120 168 169173 One of the early and best understood systems is naphthalene-sodium, a green solution of stable, solvated naphthalene radical anion.176 177 The electron transfer from the radical anion to the monomer yields a new radical anion [Eq. (13.33)]. The dominant reaction of the latter is its head-to-head dimerization to the stabile dimeric dicarbanion [Eq. (13.34)], which is the driving force for the electron transfer even when electron affinity of the monomer is less than that of the polycyclic molecule. Propagation proceeds at both ends of the chain ... 

Thermal polymerization of the VCZ-AN system was studied by Ellinger and it was reported that the homopolymer of poly VCZ alone was obtained (28). Due to the small electron affinity of weak acceptors such as AN and methyl methacrylate (MMA), total charge transfer from VCZ to acceptor was thought impossible this induced Ellinger to propose a new polymerization mechanism assuming mesomeric polarization between VCZ and acceptor to initiate and control the propagating step. The finding that AN did not copolymerize with VCZ seemed to support his mechanism. Later, spontaneous copolymerization of VCZ with MMA was reported by the same author. 

The simplest way to formally split Katrp is to present it as the product of equilibrium constants of bond homolysis of the C-X bond (Kbh), which is catalyst independent but depends on the nature of the propagating species (R ) and transferable atom X, and the catalyst-related equilibrium constant of halogenophilicity (Knaio)- Knab can further be broken down (Figure 1) and presented as the product of the formation constant Knaiido and two other equilibrium constants describing redox processes - the equilibrium constant of electron affinity of the halogen atom (Kea) and the equilibrium constant of electron transfer to and from the central metal atom (Ket), which characterizes... 

In order to obtain well-defined AB diblock copolymers by anionic polymerization and sequential monomer addition, some crucial conditions must be fulfilled (1) the carbanion formed by the second monomer must be more, or at least equally, stable than the one derived from the first monomer, and (2) the initiation of polymerization of the second monomer by the anion of the first monomer must be higher than the rate of propagation of monomer B. To fulfill these requirements, the monomers used must be added sequentially in the order of increasing electron affinity (e.g., a-methyl styrene (aMeSt) < St butadiene (Bd)< vinyl pyridine < methyl methacrylate (MMA)) and the nucleophilicity of the intermediate macromolecular carbanion A formed should at least match (though... 

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