Thomson, George published the artcileA chain model for polyelectrolytes. IX. The effects of chain length and charge on the friction constant, Recommanded Product: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, the publication is Journal of the American Chemical Society (1963), 85(17), 2537-44, database is CAplus.
cf. CA 58, 9671g. Measurements are reported of self-diffusion and viscosity as a function of chain length and charge for some protonated and unprotonated amines and for some disulfonate ions. It is found that the Peterlin theory of diffusion of short-chain mols. (CA 46, 8935a) is an accurate description of real systems. The P. theory of viscosity is qual. correct but quant. in error by a factor of 2. The placement of 2 charges on an ethylenimine leads to an extended mol. configuration. The possibility of H bonding between uncharged ethylenimines and the water leads to zero slip between mol. and solvent. Therefore, classical hydrodynamic conditions are satisfied and the system behaves differently (larger friction constant) from what would be expected from other studies in nonhydrogen-bonding solvents. When charges are placed on the ion the local water structure is modified, decreasing the efficacy (or even possibility) of H bonding. There is a range of variables wherein the friction constant per bead drops on going from the neutral mol. to the bolion (CA 52, 19353e), because of the change in solvent interactions. The transition from simple ion to polyion requires more than 5 charges per ion and longer chain lengths than considered herein.
Journal of the American Chemical Society published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C14H12O2, Recommanded Product: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia