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- W3111419679 abstract "The solvation structures of the solutions of Co(SCN)2 and CoCl2 were studied using spectroscopic (electronic and vibrational) and conductometric measurements. The Solutions of Co(NCS)2 in acetone (Ac) show the domination of the tri-thiocyanto pseudo tetrahedral specie, [Co(NCS)3Ac]− with mole fraction of 0.4984, as the thiocyante coordinated through the N. while the solvation in ethanol gave a mixed octahedral-tetraherdal concentration dependant equilibrium these species are solely coordinated with EtOH. It has been shown that concentrations above 0.0201 mol. dm-3 the solutions turn from violet to blue and the tetrahedral species became dominant is [Co(EtOH)2(SCN)2] and only at these solutions the thiocyante coordinate with the Co through the S atom. The solvation in formamide give only the hexasolvated octahedral ion [Co(FA)6]2+ with no evidence of any binding between the Co and SCN. However higher concentrations give rise to solutions with high aggregates.However the solvation of [CoCl2] in Ac give rise also to a dominating dichloro neutral tetrahedral specie [CoCl2(Ac)2] as the conductivity measurements indicated, while the dichloro netural [CoCl2(EtOH)2] dominates at high concentrations, while in concentrations lower than 0.0039 mol. dm-3 the exsitance of the 1:1 complex electrolyte [Co(EtOH)5Cl)]+[Co(EtOH)3Cl]− explains the high conductivity and low molar absorvitivity of the solutions.The CoCl2 was sparingly soluble in formamide and form a residue there for it was excluded from the study. These results were explained in light of Guttmann's theory of auto-complex formation." @default.
- W3111419679 created "2020-12-21" @default.
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- W3111419679 date "2009-01-01" @default.
- W3111419679 modified "2023-09-27" @default.
- W3111419679 title "Coordination State of Co(SCN)2 and CoCl2 in SomeNon-Aqueous Solvents" @default.
- W3111419679 hasPublicationYear "2009" @default.
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