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Inne
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.
Autorzy
Rok wydania
2001
Czasopismo
Numer woluminu
20
Strony
237-244
DOI
10.1016/S0277-5387(00)00637-9
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Synthesis of two heteroscorpionate tris(pyrazolyl)borate anionic ligands (Tp′) was described; the sterically demanding [hydrobis(3-phenylpyrazolyl)(3,5-di-tert-butylpyrazolyl)borate]− obtained by condensation of KBH4 with 3-phenylpyrazole and 3,5-di-tert-butylpyrazole and [hydrobis(3-phenyl,5-methylpyrazolyl)(3-methyl, 5-phenylylpyrazolyl)borate]− formed in similar reaction between NaBH4 and 3(5)-methyl,5(3)-phenylpyrazole. The ligands were converted into tetracoordinate [HB(3,5-di-tBupz)(3-Phpz)2]Co(NCS) and pentacoordinate [HB(3-Me,5-Phpz)(3-Ph,5-Mepz)2]Co(NCS)(THF)·THF complexes, which molecular structures were determined by X-ray crystallographic method. The reactivity of high-spin cobalt(II) complexes was studied by the 1H NMR spectroscopy in solution. The reactive [HB(3-Me,5-Phpz)(3-Ph,5-Mepz)2]Co(NCS) complex readily underwent conversions into pentacoordinate [HB(3-Me,5-Phpz)(3-Ph,5-Mepz)2]Co(OOCCH(OH)CH3) and hexacoordinate [HB(3-Me,5-Phpz)(3-Ph,5-Mepz)2]Co[HB(pz)3] complexes.
Słowa kluczowe
Heteroscorpionate tris(3-R-pyrazolyl)borate cobalt(II) complexes, Structures, NMR
Adres publiczny
https://doi.org/10.1016/S0277-5387(00)00637-9
Strona internetowa wydawcy
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