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Kolekcje
Inne
Mono and dinuclear Re(V) complexes with a hydrospirophosphorane HP~O derived ligand: synthesis, structural analysis and molecular dynamics.
Autorzy
Rok wydania
2009
Czasopismo
Numer woluminu
28
Strony
336-342
DOI
10.1016/j.poly.2008.10.045
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Two neutral mono and dinuclear rhenium(V) complexes, cis-ReOCl2(P∼O)(pym) (1) and cis-[ReOCl2(P∼O)]2(μ–pym) (2 · (CH3)2CO), with the hydrospirophosphorane ligand HP∼O (HP∼O = octamethyl-2,2,3,3,7,7,8,8-tetraoxa-5λ5 1,4,6,9-phosphaspiro-4,4-nonane) have been prepared. The coordination geometry of the complexes has been determined in solution by NMR and UV–Vis spectroscopy, as well as in the solid state by IR, FIR spectroscopy and single crystal X-ray diffraction. The complexes display distorted octahedral geometries. X-ray structures of 1 and 2 reveal that the ReCl2NP fragments are equatorially disposed and the oxygens, terminal oxo and alcoholato, lie in axial positions. The pyrimidine coordinates as a monodentate or bridging ligand. Detailed temperature dependent 1H NMR analysis for both 1 and 2 shows that in solution the diaza moiety exhibits hindered rotation about the Re–N bond. Furthermore two concomitant conformation changes, one in the metallacycle and the second in the phosphorus cycle, are also observed for dimer 2.
Słowa kluczowe
Oxo-rhenium(V) complexes, Hydrospirophosphorane ligand, Diaza ligand, Dinuclear compound
Adres publiczny
https://doi.org/10.1016/j.poly.2008.10.045
Strona internetowa wydawcy
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