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>3 + 1 = 6 + 2> In Cu(ii) coordination chemistry of 1H-pyrazole aza cryptands

AuthorsPitarch-Jarque, Javier; Belda, Raquel; Lloret, Francesc; Ferrando-Soria,Jesús; Navarro, Pilar ; Lopera, Alberto; García-España, Enrique
Issue Date2015
PublisherRoyal Society of Chemistry
CitationDalton Transactions 44: 3378- 3383 (2015)
AbstractA polyazamacrocycle formed from two tris(2-aminoethyl)amine units connected by 1H-pyrazole units shows unique hexanuclear Cu(ii) complexes by combination of two binuclear Cu(ii) cryptand complexes through pyrazolate moieties belonging to both cryptands. The formation of these dimeric entities has been proven both in solution by potentiometric studies and mass spectroscopy and in the solid state by X-ray diffraction of crystals of three different batches of formulae [Cu6(H-3L)2(H2O)2](TsO)6·22H2O (2), [Cu6(H-3L)2(NO3)2](NO3)4·2H2O (3) and [Cu6(H-3L)2Cl2]Cl4·(C4H5N3O2)2·14.35H2O (4). The hexanuclear unit in 2 and 4 can be viewed like three magnetically independent binuclear complexes with J = -366(3) cm-1, g = 2.08(1) for 2 and J = -360(3) cm-1, g = 2.07(1) for 4. This journal is
Identifiersdoi: 10.1039/c4dt03650f
issn: 1477-9226
e-issn: 1477-9234
Appears in Collections:(IQM) Artículos
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