Self-Assembly of High-Nuclearity Metal Clusters: Programmed Expansion of a Metallasiloxane Cage to an Octacopper(II) Cluster
| Autor: | and Antonio C. Fabretti, Cecilia Mortalò, Andrea Caneschi, Gian Luca Abbati, Andrea Cornia |
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| Rok vydání: | 2004 |
| Předmět: |
crystal structure
cluster complexes Spin states Chemistry Stereochemistry Cyanide Supramolecular chemistry chemistry.chemical_element siloxanes cage compounds magnetic properties supramolecular chemistry Crystal structure Copper Inorganic Chemistry Crystallography chemistry.chemical_compound Cluster (physics) Amine gas treating Physical and Theoretical Chemistry Monoclinic crystal system |
| Zdroj: | Inorganic Chemistry. 43:4540-4542 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/ic049898+ |
| Popis: | The novel octanuclear copper(II) cluster [Cu6[(PhSiO2)6]2[NCCu(Me6tren)]2(MeOH)4]2+ (1) has been isolated as a perchlorate salt by reacting the hexacopper(II) metallasiloxane cage [Cu6[(PhSiO2)6]2(nBuOH)x] (x = 4, 6) with [Cu(Me6tren)CN]ClO4 in a methanol/chloroform mixture (Me6tren = tris(2-(dimethylamino)ethyl) amine). Crystal data for 1(ClO4)2 x MeOH: monoclinic, space group P2(1)/n (no. 14), a = 16.8490(3) angstroms, b = 22.2966(4) angstroms, c = 17.2508(3) angstroms, beta = 94.7658(5) degrees, V = 6458.3(2) angstroms3, Z = 2. The structure comprises a highly distorted hexagonal Cu6 array linked to two [Cu(Me6tren)] units via cyanide bridges. Magnetic measurements reveal that the addition of the copper cyanide complexes dramatically affects the magnetism of the Cu6 unit, whose ground spin state changes from S = 3 to S = 0. |
| Databáze: | OpenAIRE |
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