Anionic species j

Tokuda H, Hayamizu K, Ishii K et al. (2004) Physicochemical properties and structures of room temperature ionic liquids. 1. Variation of anionic species. J Phys Chem B 108 16593-16600... 

Matsuoka K, Sakamoto S, Nakato K et al (2008) Degradation of polymer electrolyte fuel cells under the existence of anion species. J Power Sources 179 560-565... 

Chen Y-C, Xie R, Chu L-Y (2013) Stimuli-responsive gating membranes responding to temperature, pH, salt concentration and anion species. J Membr Sci 442 206-215... 

The majority of U(V1) coordination chemistry has been explored with the trans-ddo s.o uranyl cation, UO " 2- The simplest complexes are ammonia adducts, of importance because of the ease of their synthesis and their versatihty as starting materials for other complexes. In addition to ammonia, many of the ligand types mentioned ia the iatroduction have been complexed with U(V1) and usually have coordination numbers of either 6 or 8. As a result of these coordination environments a majority of the complexes have an octahedral or hexagonal bipyramidal coordination environment. Examples iuclude U02X2L (X = hahde, OR, NO3, RCO2, L = NH3, primary, secondary, and tertiary amines, py n = 2-4), U02(N03)2L (L = en, diamiaobenzene n = 1, 2). The use of thiocyanates has lead to the isolation of typically 6 or 8 coordinate neutral and anionic species, ie, [U02(NCS)J j)/H20 (x = 2-5). 

The kinetics of polymerization and conductometric studies of barium polystyrene with one active end-group per chain were reported by De Groof et al. 79,80). Formation of an unconventional anionic species, Ba2 +, (CH(Ph)CH2—)j, had to be postulated to account for the results. The existence of such a species is supported by the recent study of the kinetics of polymerization of lithium polystyrene performed in the presence of barium polystyrene endowed with two active endgroups 78). The polymerization of the lithium salt is retarded by the presence of the barium salt, and the retardation is accounted for by the formation of the inert aggregated anions,... 

J+,./ = flux per unit area of cationic and anionic species, respectively... 

In solutions containing an excess of azide ions, the diazido anion Ag(N3)J was proposed to account for the increase in solubility. No structural information is available of isolated salts or from solution studies. Table 22 gives stability constants (log /S2) for the anion in a range of solvents.132,133 Significant increases in stability were found in the non-aqueous solvents as compared to water, a result similar to that found for other anionic species AgXj (see Section 54.1.7). 

Zinc(II) oxide is insoluble in neutral water, but soluble in dilute acids Zn2+(aq) is stable at low pH values. If an acid solution containing Zn2+ is treated with an alkali, Zn(OH)2 precipitates around neutral pH but redissolves at a pH of about 14, with formation of Zn(OH)J(aq) and Zn(OH)4 (aq). The fact that Zn(II) forms cationic aqueous species in acid solution and anionic species at alkaline pH determines the amphoteric character of ZnO. 

Lehn, J. M. Sonveaux, E. Willard, A. K. Molecular recognition. Anion cryptates of a macrobicyclic receptor molecule for linear triatomic species, J. Am. Chem. Soc. 1978,100, 4914-4916. 

Santhanam R, Noel M. Electrochemical intercalation of cationic and anionic species from a lithium perchlorate-propylene carbonate system—a rocking-chair type of dual-intercalation system. J Power Sources 1998 76 147-152. 

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