Effect of cation size

Chatterjee S., Bohidar H.B. 2005. Effect of cationic size on gelation temperature and properties of gelatin hydrogels. International Journal of Biological Macromolecules 35, 81-88. 

For the compounds with lighter aUcali metals which have the same composition, the formation of the isoelectronic one-dimensionaUy extended chains is favored [96]. This once again demonstrates the effect of cation size beyond the charge compensating function on the nature of the observed anions. 

The proposed mechanism is consistent with the experimental results obtained so far. For instance the effects of cation size and -coordination are readily understood in terms of the chelated complex [10a] as is the absence of stereoselectivity in the case of the corresponding 4-pyridyl derivatives where coordination with cation in the manner shown above is impossible. The similarity between vinyl addition and methylation stereochemistry is likewise consistent with the proposed mechanism. Thus it is the equilibrium between [10] and [11] that is primarily responsible for the observed stereochemistry. Work on the stereochemistry of other electrophylic reactions of [2a] is in progress. 

The electron-doped regime (x > 0.5) of the rare earth manganates of the general formula Lni- Ca Mn03 is dominated by charge-ordering effects. While the effects of cation size and size disorder on the charge-ordered states of the hole- and electron-doped compositions are similar, their properties vary markedly as revealed by the comparison of the properties of the hole-doped... 

T he determination of the activity coefficient of an electrolyte in binary mixtures of another electrolyte with a common ion has prompted considerable interest, both in the development of the underlying theory, as well as precise experimental measurements. This kind of study is useful in applications that involve metallurgical and biological systems. The ion interaction parameters (doublet and triplet, among others) responsible for an understanding of the effects of cation size on the thermodynamic... 

Hales PW, Pass G. Effect of cation size on the enthalpy of dilution of alkali-metal salts of carboxymethylcellulose. J Chem Soc Faraday Trans 1 1981 77 ... 

There are many questions remaining and many puzzUng, unexplained effects such as the effect of cation size and valence on film stability. These questions point to the need to develop a better understanding of the crystal-like structure of LB films, the role of molecular and structural forces in creating these structures, and the nature and stability of electrical double layers subject to mechanical perturbations in the underlying subphase. 

Satisfactory agreement between theory and experimental values was also reported for sodium polyvinylsulphonates. (14) The effect of cation size on the enthalpy of dilution of polystyrenesulphonates has been reported at low concentrations (16) and also at relatively high concentrations (17). 

DA1 Daoust, H. and Hade, A., Effect of cation size on heats of dilution of aqueous solutions of alkaline poly (sty renesulfonates). Macromolecules, 9, 608, 1976. 

The effect of cation size (ionic radius, hydrated radius, or hydration number)... 

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