Cationic silver compounds with metal (Co, Rh, Ir) tris(dithiocarbamate) and tris(diselenocarbamate) complexes as ligands: synthetic, electrochemical, NMR, electrospray mass spectrometric and X-ray crystallographic studies
| Autor: | Alan M. Bond, Yvonne A. Mah, Ray Colton, Bryan M. Gatehouse |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
chemistry.chemical_classification
chemistry.chemical_element Tetrahedral molecular geometry Crystal structure Electrochemistry Inorganic Chemistry Metal chemistry.chemical_compound Crystallography chemistry visual_art Materials Chemistry visual_art.visual_art_medium Physical and Theoretical Chemistry Dithiocarbamate Cobalt Dichloromethane Monoclinic crystal system |
| Zdroj: | Inorganica Chimica Acta. 260:61-71 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/s0020-1693(96)05551-x |
| Popis: | The interaction of metal tris(dithiocarbamate) (M=Co, Rh, Ir; dithiocarbamate=dtc=[R 2 NCS 2 ] − ) and tris(diselenocarbamate) (dsc=[R 2 NCSe 2 ] − ) complexes with AgBF 4 in dichloromethane/toluene solution led to the formation of [Ag{M(R 2 dtc) 3 } 2 ]BF 4 and [Ag{M(R 2 dsc) 3 } 2 ]BF 4 compounds which were isolated as stable solids. Extensive voltammetric and electrospray mass spectrometric studies showed that the cations retained their identities in solution. Electrochemical measurements and, for the cobalt complexes 59 Co NMR studies, showed the cations to be thermodynamically very stable but kinetically labile in solution. [Ag{Co(i-Pr 2 dtc) 3 } 2 ]BF 4 ·0.5C 6 H 14 was isolated in the form of crystals suitable for X-ray analysis. Crystal data for [Ag{Co(i-Pr 2 dtc) 3 } 2 ]BF 4 ·0.5C 6 H 14 : M r =1413.5, monoclinic space group P 2 1 / n (No. 14), a =15.625(5), b =19.29(1), c =25.41(1) A, β =103.88(3)°, Z =4, Mo K α radiation, R =0.082, R w =0.079 for 2979 independent reflections. The crystal structure consists of discrete [Ag{Co(i-Pr 2 dtc) 3 } 2 ] + cations and [BF 4 ] − anions together with hexane of crystallisation. The Co(i-Pr 2 dtc) 3 units are coordinated to silver through two sulfur atoms of different dithiocarbamate ligands to generate approximately tetrahedral geometry about silver. There is no direct Ag–Co bonding. |
| Databáze: | OpenAIRE |
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