Structural and Thermodiffractometric Analysis of Coordination Polymers. Part 1., Tin Derivatives of the Bim ligand [Bim ) Bis(1-imidazolyl)methane])
Articolo
Data di Pubblicazione:
2007
Citazione:
Structural and Thermodiffractometric Analysis of Coordination Polymers. Part 1., Tin Derivatives of the Bim ligand [Bim ) Bis(1-imidazolyl)methane]) / N. Masciocchi, C. Pettinari, E. Alberti, R. Pettinari, C. Di Nicola, A. Figini Albisetti, A. Sironi. - In: INORGANIC CHEMISTRY. - ISSN 0020-1669. - 46:25(2007), pp. 10491-10500. [10.1021/ic701530c]
Abstract:
New polynuclear coordination species containing the ditopic bis(1- imidazolyl)methane (Bim) ligand have been prepared as microcrystalline powders and structurally characterized by ab initio X-ray powder diffraction methods.
[Bim(Me2SnCl2)]n (1), [Bim(nBu2SnCl2)]n (3), [Bim(Ph2SnCl2)]n (4), [Bim(MeSnCl3)]n (5), and [Bim(PhSnCl3)]n (6) all contain 1D chains with octahedral tin atoms with trans N-Sn-N linkages (but 4, which displays a cis N-Sn-N linkage). Their thermodiffractometric analysis allowed the estimation of the linear thermal expansion coefficients and strain tensors derived there from. The potential-energy surface of the free Bim ligand (as defined by two torsional degrees of freedom about the two N-CH2 bonds), eventually controlling the length of the repeating unit (polymer elongation), has been estimated using molecular mechanics and correlated with experimental observations.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
powder diffraction ; tin ; bis(imidazolyl)methane ; rietveld refinement ; strain tensor
Elenco autori:
N. Masciocchi, C. Pettinari, E. Alberti, R. Pettinari, C. Di Nicola, A. Figini Albisetti, A. Sironi
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