Spectral properties and crystal structure of bis(μ-thiocyanato-N,S)bis-(thiocyanato-N)tetrakis(5,7-dimethyl[1,2,4]triazolo[1,5-α]pyrimidine-N3)dicopper(II) and of tetrakis(5,7-dimethyl[1,2,4]triazolo[1,5-α]pyrimidine-N3)platinum(II) hexa(thiocyanato-S)platinate(IV)
1983; Elsevier BV; Volume: 72; Linguagem: Inglês
10.1016/s0020-1693(00)81699-0
ISSN1873-3255
AutoresM. Biagini Cingi, A. M. MANOTTI LANFREDI, António Tiripicchio, Jaap G. Haasnoot, J. Reedijk,
Tópico(s)Magnetism in coordination complexes
ResumoThe preparation, spectroscopic studies and the crystal structure of Cu(dmtp)2(NCS)2 (I) and Pt(dmtp)4Pt(SCN)6 (II) (dmtp stands for the 5,7-dimethyl[1,2,4]triazolo[1,5-a] pyrimidine ligand) are described. Crystals of I are monoclinic, space group C2/c, with a = 19.088(7), b = 11.516(8), c = 20.118(7) Å, β = 104.51(4)°, Z = 28; crystals of II are monoclinic, space group P21/n, with a = 16.914(8), b = 11.474(9), c = 11.893(7) Å, β = 91.52(4)°, Z = 2. The structures of I and II have been solved from diffractometer data by Patterson and Fourier methods and refined by full-matrix least-squares to R = 0.044 for I and 0.051 for II. The structure of I consists of centrosymmetric dimers [Cu(dmtp)2(NCS)2]2, in which the copper atoms, bridged by two thiocyanate groups, are in a square pyramidal arrangement involving two isothiocyanate nitrogen atoms and two triazole nitrogen atoms from two dmtp ligands in the basal plane and a thiocyanate sulphur atom from the centrosymmetric complex in the apical position. The structure of II consists of square planar [Pt(dmtp)2]2+ cations, in which the platinum atom is bound to four triazole nitrogen atoms from dmtp ligands and of octahedral [Pt(SCN)6]2− anions with the metal bound to sulphur atoms of thiocyanate anions.
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