Transition metal complexes with pyrazole derivatives as ligands

Bieller, Susanne; Haghiri, Alireza; Bolte, Michael; Bats, Jan W.; Wagner, Mat­thias; Lerner, Hans‐Wolfram

doi:10.1016/j.ica.2005.10.034

Cited by 55 publications

(31 citation statements)

References 16 publications

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“…In thim 2 , the two imidazole rings are in the cis-trans mode, having a dihedral angle of 71.46°due to C-N bond rotation (Table 2 and (Table S1). All the Co-N/O bond distances are found to be comparable with other similar bonded CPs [57,58].…”

Section: Crystal Structure Of {[Co(thim 2 ) 2 (No 3 ) 2 ] N (4)supporting

confidence: 69%

Coordination polymers with varying dimensionality constructed from 2,5-bis(imidazol-1-yl)thiophene (thim2) and divalent metal (Mn2+, Cd2+, Co2+) salts

Singh

Anantharaman

2015

Polyhedron

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Section: Crystal Structure Of {[Co(thim 2 ) 2 (No 3 ) 2 ] N (4)supporting

confidence: 69%

Coordination polymers with varying dimensionality constructed from 2,5-bis(imidazol-1-yl)thiophene (thim2) and divalent metal (Mn2+, Cd2+, Co2+) salts

Singh

Anantharaman

2015

Polyhedron

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“…[63] The pyrazolyl nitrogen atom N(12) binds to Cu(1); N(22), which is part of the second pyrazolyl ring, coordinates Cu(2) (Cu (1) (2) ). [64] Complex 14 crystallized from a mixture of ligand K 2 [10] and 3.3 equiv of CuCl in THF with one THF ligand bonded to each K + ion (14A C H T U N G T R E N N U N G (thf) 2 ). The compound forms coordination polymers in the solid state; a view of the repeat unit, which possesses a C 2 axis running through Cu(1) and K(2), is provided in Figure 9.…”

Section: Each Half Of the Centrosymmetric Molecule Of 13 Consists Of mentioning

confidence: 99%

Copper Complexes of Mono‐ and Ditopic [(Methylthio)methyl]borates: Missing Links and Linked Systems En Route to Copper Enzyme Models

Ruth

Tüllmann

Vitze

et al. 2008

Chemistry A European J

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TMEDA-free (TMEDA: tetramethylethylenediamine) LiCH(2)SMe is a suitable reagent for the selective introduction of (methylthio)methyl groups into PhBBr(2) and its p-silylated derivative Me(3)Si--C(6)H(4)--BBr(2). The resulting compounds, R*--C(6)H(4)--B(Br)(CH(2)SMe) (R*=H: 2; R*=SiMe(3): 7) and PhB(CH(2)SMe)(2) (3), form cyclic dimers through B--S adduct bonds in solution and in the solid state. Compounds 2 and 3 have successfully been used for preparing the (N(2)S) scorpionate [PhBpz(2)(CH(2)SMe)](-) ([5](-)) (pz: pyrazol-1-yl) and the (NS(2)) scorpionate [PhBpz(CH(2)SMe)(2)](-), respectively. Compound 7 proved to be an excellent building block for the heteroditopic poly(pyrazol-1-yl)borate p-[pz(3)B--C(6)H(4)--Bpz(2)(CH(2)SMe)](2-) ([10](2-)) that mimics the two ligation sites of the copper enzymes peptidylglycine alpha-hydroxylating monooxygenase and dopamine beta-monooxygenase. Treatment of the monotopic tripod [5](-) with CuCl and CuBr(2) results in the formation of complexes K[Cu(5)(2)] and [Cu(5)(2)]. An X-ray crystallography study of K[Cu(5)(2)] revealed a tetrahedral (N(2)S(2)) coordination environment for the Cu(I) ion, whereas the Cu(II) ion of [Cu(5)(2)] possesses a square-pyramidal (N(4)S) ligand sphere (S-atom in the axial position). The remarkable redox properties of K[Cu(5)(2)] and [Cu(5)(2)] have been assessed by cyclic voltammetry and quantum chemical calculations. The reaction of K[Cu(5)(2)] with dry air leads to the Cu(II) species [Cu(5)(2)] and to a tetranuclear Cu(II) complex featuring [PhB(O)pz(2)](2-) ligands. Addition of CuCl to K(2)[10] gives the complex K(3)[Cu(10)(2)] containing two ligand molecules per Cu(I) center. The Cu(I) ion binds to both heteroscorpionate moieties and thereby establishes a coordination environment similar to that of the Cu(I) ion in K[Cu(5)(2)].

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“…However, in the presence of transition metal salts MX 2 , in some cases we observed degradation reactions of scorpionate ligands [10]. Especially bis(pyrazol-1-yl)borates [11e13] such as the ones mentioned in Fig.…”

Section: Introductionmentioning

confidence: 99%

Chemical behavior of ortho-hydroquinone-based bis(pyrazol-1-yl)methane ligands in the presence of palladium(II) chloride

Blasberg

Bolte

Lerner

2011

Journal of Organometallic Chemistry

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Transition metal complexes with pyrazole derivatives as ligands

Cited by 55 publications

References 16 publications

Coordination polymers with varying dimensionality constructed from 2,5-bis(imidazol-1-yl)thiophene (thim2) and divalent metal (Mn2+, Cd2+, Co2+) salts

Coordination polymers with varying dimensionality constructed from 2,5-bis(imidazol-1-yl)thiophene (thim2) and divalent metal (Mn2+, Cd2+, Co2+) salts

Copper Complexes of Mono‐ and Ditopic [(Methylthio)methyl]borates: Missing Links and Linked Systems En Route to Copper Enzyme Models

Chemical behavior of ortho-hydroquinone-based bis(pyrazol-1-yl)methane ligands in the presence of palladium(II) chloride

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