Thiocyanates, preparations listed table

The sodium salt of these acids may be used to prepare aqueous solutions of indicators. Other examples of redox indicators include starch, potassium thiocyanate, methylene blue, and phenosafranine. Some selected general indicators in redox titrations are listed in Table 1.6.3. The properties of starch as an indicator in iodometric titration are discussed in the following section. 

All the examples reported so far appear to contain N-bonded thiocyanate groups and to dissociate readily in solution. Thus, [ScL3](NCS)3 (L = bipy or phen) has been prepared and characterized 223). Treatment with warm EtOH gives [ScL2(NCS)2](NCS) where the formulation is supported by conductivity measurements (in CHgCN or CH3NO2) and infrared mull spectra in aqueous solutions the coordinated NCS is displaced 223, 225, 464). Other mixed liquid complexes of these metals with NCS are listed in Table XX. A 1 1 adduct is formed between 1,3,5-trinitrobenzene and several lanthanide thiocyanates. No... 

Materials. Origin and characteristics of the cellulose samples used are listed in Table I. The low molecular weight cellulose sample A, was prepared from American Enka rayon by hydrolysis in 4 M HCl for 15 minutes and then washed with an eluotropic series of solvents. Sheets of samples C and D were shredded in a Wiley Mill (40 mesh) before use. Sample B, with degree of polymerization DP) of 210, was used in this study except where noted. Ammonium thiocyanate (Witco Chemical) was dissolved in condensed anhydrous ammonia (Air Products). Unless otherwise noted, all chemicals were ACS reagent grade. 

Analogous investigations were performed by Madeja et al. [Ma 76] with the mixed complex consisting of the hydrogen-bond containing nickel(II) macrocyclic complex (I) and thiocyanate ion. The equilibrium constants determined in solutions prepared with various donor solvents are listed in Table 4.8. By comparison with Table 4.7, it can be seen that, with the exception of acetonitrile, the stability of the thiocyanate complex is higher than that of the iodide complex in every solvent this... 

This chapter comprises organotin compounds having a pseudohalogen group linked to tin. Aside from (iso)cyanides, (iso)cyanates (iso)thiocyanates and azides reported in the Main Volume, a number of novel derivatives are added. These include (iso)selenocyanate-NCSe, fulminate-CN 0 and N-derivatives of dicyanamide-N(CN)2 and tricyanomethane-N C C(CN)2 The compounds listed in Tables 158 and 159 are prepared by the following methods. 

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