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Versatile Coordination Behavior of the Asymmetric Bis(3‐mesityl‐pyrazol‐1‐yl)(5‐mesitylpyrazol‐1‐yl) Hydroborate Ligand towards Late 3 d M 2+ Ions
Author(s) -
Müller Lars,
Nadurata Vincent L.,
Cula Beatrice,
Hoof Santina,
Herwig Christian,
Limberg Christian
Publication year - 2021
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202000895
Subject(s) - homoleptic , chemistry , ligand (biochemistry) , coordination complex , metal , crystallography , metal ions in aqueous solution , stereochemistry , ion , divalent , medicinal chemistry , organic chemistry , receptor , biochemistry
Bearing in mind the potential which tris(pyrazolyl) hydroborate ligands have demonstrated in various different fields of coordination chemistry, the behavior of a more rarely employed representative, namely bis(3‐mesitylpyrazol‐1‐yl)(5‐mesitylpyrazol‐1‐yl) hydroborate (Tp Mes,H *), towards a series of divalent metal ions has been investigated. Thus, the synthesis of two new heteroleptic metal chlorido [Tp Mes,H *MCl] complexes, 2 , (Mn 2+ , 2 ‐ a , and Cu 2+ , 2 ‐ e ) are described, which correspond to the typical precursor compounds that would be needed for subsequent research. Structural and spectroscopic properties of the two new and four published members of this series (M=Fe 2+ , 2 ‐ b , Co 2+ , 2 ‐ c , Ni 2+ , 2 ‐ d , Zn 2+ , 2 ‐ f ) are discussed in detail for the solid and solution states. Furthermore, synthetic routes to five homoleptic [(Tp Mes,H *) 2 M] complexes, 3 , bearing Mn 2+ , 3 ‐ a , Fe 2+ , 3 ‐ b , Co 2+ , 3 ‐ c , Ni 2+ , 3 ‐ d , and Cu 2+ , 3 ‐ e , ions as well as an alternative preparation method for [( κ 2 ‐Tp Mes,H *) 2 Zn], 3 ‐ f , are described. Their structures and spectroscopic parameters are compared to those of their heteroleptic counterparts. Additionally, the complex [(Tp H,Mes *) 2 Cu], 4 , is reported, representing the second example of a complex with the (3‐mesitylpyrazol‐1‐yl)bis(5‐mesitylpyrazol‐1‐yl) hydroborate ligand (Tp H,Mes *).