Guanidinium , hydrate

The similarity of the guanidinium ion, in which the distance between the carbon and the hydrogen atoms is about 2.1 A, to the hydrated sodium ion [Na(OH2)3] in which the distance between the sodium and the hydrogen atoms is about 2.3A, has been pointed out [33, 36a], and the physiological... 

A recent study of the structural analysis by single cryst methods (Refs 14 15) shows that Tetracene is the zwitterion (guanidinium) of 1-Ami no-1-[(1H-tetrazole-5-yI)azo]- guanidine Hydrate of structure ... 

Mason, P.E., Neilson,G.W., Dempsey, C.E., Barnes, A.C., Cruikshank, J.M. (2003) The hydration structure of guanidinium and thiocyanate ions Implications for protein stability in aqueous solution, Proc.Natl.Acad.Sci. 100, 4557-4561 ... 

FoMNioPtQHi , I.8H2O, Platinate, tetra-cyano-, guanidinium (hydrogen difluoride) (1 2 0.27), hydrate (1 1 8), 21 146... 

Urea, formamide, and guanidinium salts are believed to increase the CMC of surfactants in aqueous solution, especially polyoxyethy-lenated nonionics because of their disruption of the water structure (Schick, 1965). This may increase the degree of hydration of the hydrophilic group, and since hydration of the hydrophilic group opposes micellization, may cause an increase in the CMC. These water structure breakers may also increase the CMC by decreasing the entropy effect... 

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