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Complexes of heteroscorpionate trispyrazolylborate anionic ligands. Part I. The crystal stucture and reactivity of thiocyanato[hydrobis(3-phenylpyrazolyl)(3-tert-butylpyrazolyl)borato]cobalt(II) complex.

Autorzy

Marta Łukasiewicz

Zbigniew Ciunik

Stanisław Wołowiec

Rok wydania

2000

Czasopismo

Polyhedron

Numer woluminu

19

Strony

2119-2125

DOI

10.1016/S0277-5387(00)00512-X

Kolekcja

Naukowa

Język

Angielski

Typ publikacji

Artykuł

Streszczenie

The high-spin cobalt(II) complexes with homoscorpionate hydrotris(3-phenylpyrazolyl)borate (TpPh) and heteroscorpionate hydrobis(3-phenylpyrazolyl)(3-tert-butylpyrazolyl)borate {HB(3-Phpz)2(3-t-Bupz)} anionic ligands (Tp′) of the general formula Tp′Co(X) were studied. The former tripodal ligand provides intermediate steric hindrance for the central metal ion, which is able to adopt two additional donors from thiocyanate and neutral ligands like pyrazole (pzH) and methanol, or two oxygen donors from the lactate anion. Replacement of one of three 3-phenyl substituents in TpPh by the tert-butyl one produces a ligand of high steric hindrance which gave tetracoordinate Tp′Co(X) complexes, where X=thiocyanate or monodentate lactate. The complexes were studied by the 1H NMR spectroscopic method in solution and two of them, TpPhCo(NCS)(pzH) and [HB(3-Phpz)2(3-t-Bupz)]Co(NCS), were characterized structurally by X-ray crystallography.

Słowa kluczowe

Heteroscorpionate tris(3-R-pyrazolyl)borate cobalt(II) complexes, Structures, NMR

Adres publiczny

https://doi.org/10.1016/S0277-5387(00)00512-X

Strona internetowa wydawcy

http://www.elsevier.com

Podobne publikacje
2001

Complexes of heteroscorpionate trispyrazolylborate anionic ligands. Part III. X-ray crystallographic and NMR studies on cobalt(II) complexes with tris(pyrazolyl)borate anionic ligands obtained from 3,5-di-methylpyrazole and 3(5)-methyl,5(3)-phenylpyrazole.

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Complexes of heteroscorpionate trispyrazolylborate anionic ligands. Part II. The X-ray crystallographic and 1H NMR studies on thiocyanato[hydrobis(3-phenylpyrazolyl)(3,5-di-tert-butylpyrazolyl)-borato]cobalt(II) and thiocyanato[hydrobis(3-phenyl,5-methylpyrazolyl)(3-methyl,5-phenylylpyrazolyl)borato]cobalt(II) complexes.

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