Behaviour of Some Copper(I) and Cobalt(III) Complexes in Acetonitrile and n-Butyronitrile at 298.15K

Abstract

Molar conductances of a large number of copper(I) and cobalt(III) complexes, behaving as strong 1:1 electrolytes, have been measured in acetonitrile (AN) and n-butyronitrile (n-BTN) at 298.15K. The conductance data have been analyzed by the Shedlovsky method to evaluate Λ0 and KA values of these electrolytes. Limiting ion conductances (λi0) for various ions in AN have been calculated by using transference number data. In n-BTN, where no transference number data is available, such values have been calculated by an indirect method using Bu4NBPh4 as a reference electrolyte. The actual ionic radii (ri) for various ions in solution have been calculated using a modified form of Stokes’ law. The ionic radii (ri) for various complex ions have been compared with the ionic radii of two reference ions, Bu4N+ and Ph4B−, which are not solvated in dipolar aprotic solvents, to throw light on the solvation behaviour of these complex ions.

Cationic Cobaltammines as anion receptors: a convenient synthesis, characterization and X-ray structure of [CO(NH3)6]ClSeO4·3H2O

“…The hexaamminecobalt(III) cation has proved very useful as a large counter ion in stabilizing [15] [18][19][20][21][22][23][24] of our interest in cobalt(III) complex salts.…”

Physico-chemical Studies of Solvation Behaviour of Some Chromium (III) Complexes in Nitromethane and Dimethyl Sulfoxide at 298.15, 308.15 and 318.15 K

“…The organic solvents i.e.,nitromethane (NM) and dimethyl sulphoxide (DMSO) (both from Sd. Fine Chemicals, Mumbai) were purified using standard methods 6,7 . Ammonium diamminetetrathiocyanato-N chromate (III) NH4 [Cr(NCS)4(NH3)2 (Reinecke's salt) was synthesised by the method described in the literature 8 and was purified by recrystallization.…”

“…Using ionic Bcoefficients of ClO4in present solvent system, B-coefficients for the other cations have been calculated and are reported in Table 3. (6) where α is the degree of dissociation, f± the mean ion activity coefficient of the electrolyte and S is Onsager slope.…”

Synthesis, Spectroscopic and X-ray Structural Study ofcis-diazidobis- (ethylenediamine)Cobalt(III) Thiocyanate

“…Two isomers of the starting material, cis and trans, have been reported [16]. In continuation of our interest [17][18][19][20][21][22] in cobalt(III) salts, this article reports the synthesis and characterization of cis-[Co(en) 2 (N 3 ) 2 ]SCN.…”