can someone plz tell me what are pseudo halide ions???
1normally, these are known to consist of two or more atoms of which at least one is N.these hav properties
similar to those of halide ions.thus,they r called pseudohalides.Pseudohalide ions r univalent,and these form
salts resembling the halide salts.some of the pseudohalide ions combine to form dimers comparable to the
halogen molecules X2.For e.g. - (CN)2(cyanogen) , (SCN)2(thiocyanogen) , (SeCN)
2(selenocyanogen) etc.
1check if this can help u
The differential capacitance of electrochemically roughened silver surfaces in mixed perchlorate electrolytes containing chloride, bromide, iodide, thiocyanate, or azide anions has been measured as a function of electrode potential and anion concentration. These results are compared with corresponding data for electropolished silver in order to ascertain the influence of surface roughening on the double-layer structure and composition of polycrystalline silver-aqueous interfaces. The surface concentrations of specifically adsorbed anions were obtained from these capacitance-potential data using a “Hurwitz-Parsons†type of analysis. Although electrochemical roughening by means of a conventional oxidation-reduction cycle in chloride media is a prerequisite to the appearance of Surface-Enhanced Raman Scattering (SERS) for these adsorbates, it yields only moderate (ca. 1.5- to 2-fold) increases in the actual surface area and has a relatively minor effect on their average surface concentration. However, roughening does induce noticeable changes in the morphology of the capacitance-potential curves which are traced to alterations in the surface-crystallite structure. Comparisons between the potential dependence of SERS with corresponding capacitance-potential data indicate that anion coverages close to a monolayer are necessary for stable SERS. This is attributed to the stabilization of Raman-active silver clusters by surrounding adsorbed anions.
1Pseudohalogens are binary inorganic compounds of the general form XY, where X is a cyanide, cyanate, thiocyanate etc. group and Y is any X, or a true halogen. Not all combinations are known to be stable. Examples include cyanogen, (CN)2, and iodine cyanide, ICN. These anions behave as halogens and the presence of the internal double bonds or triple bonds do not appear to affect their chemical behavior.
11ul find more or less same thing what aieee n abishek mentioned if u search in wikipedia.