Icosahedral carbonyl clusters [Ni10Sb2(μ 12-Ni)Ni(CO)32-(CO)18] n- (n = 2, 3 or 4); synthesis, spectroscopic, electrochemical and bonding analysis. Crystal structures of [Ni10Sb2(μ 12-Ni)Ni(CO)32(CO)18] n- (n = 2 or 3)
Articolo
Data di Pubblicazione:
1991
Citazione:
Icosahedral carbonyl clusters [Ni10Sb2(μ 12-Ni)Ni(CO)32-(CO)18] n- (n = 2, 3 or 4); synthesis, spectroscopic, electrochemical and bonding analysis. Crystal structures of [Ni10Sb2(μ 12-Ni)Ni(CO)32(CO)18] n- (n = 2 or 3) / V.G. Albano, F. Demartin, M.C. Iapalucci, F. Laschi, G. Longoni, A. Sironi, P. Zanello. - In: JOURNAL OF THE CHEMICAL SOCIETY DALTON TRANSACTIONS. - ISSN 0300-9246. - S(1991), pp. 739-748.
Abstract:
The new [Ni13Sb2(CO)24]n- (n = 2, 3 or 4) cluster anions have been isolated from the reaction of [Ni 6(CO)12]2- with SbCl3 and have been characterized spectroscopically and electrochemically. Their structures (n = 2 or 3), elucidated by X-ray diffraction studies, consist in Ni-centred icosahedral [Ni11Sb2(CO)18]n- moieties which display an unexpected electron count and formally behave as 'exotic' distibine bridging ligands. The compound [N(PPh3) 2]2[Ni13Sb2(CO)24] is triclinic, space group P1̄, with a 13.134(3), b 13.546(2), c 15.416(2) Å, α = 109.54(1), β = 91.47(2), γ = 101.68(1)° and Z = 1; final R 0.030. Compound [NMe3(CH2Ph)] 4[Ni13Sb2(CO)24]Cl is monoclinic, space group C2/c, with a 20.615(4), b 15.508(3), c 25.805(19) Å, β = 99.21(4)° and Z = 4; final R 0.034. A bonding analysis of icosahedral nickel carbonyl clusters centred by a transition or a main group element, as well as non-centred, has been carried out. This indicates the relevance of both the cavity occupation and the number of ligands and the associated stereogeometry in determining the number of cluster valence electrons.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
V.G. Albano, F. Demartin, M.C. Iapalucci, F. Laschi, G. Longoni, A. Sironi, P. Zanello
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