Cobalt(II) scorpionate-like complexes obtained from in situ synthesized ligand created in [Co(0)–1-hydroxymethyl-3,5-dimethylpyrazole–VOSO4–NH4SCN] system

New oxovanadium(iv) complexes with pincer ligand obtained in situ: experimental and theoretical studies on the structure, spectroscopic properties and antitumour activity

“…8 Moreover, many pyrazolyl complexes have been prepared and probed for therapeutic actions across a spectrum of diseases and anticancer properties comparable with cis-dichlorodiamineplatinium(II) (cisplatin). Unexpectedly, in contrast to the earlier study with zerovalent cobalt [10][11][12][13]15 and nickel 14 chromium was absent in the composition of the isolated product from the [Cr 0 -VOSO 4 -NH 4 SCN-pyrazole derivative (L)] system. [7][8][9] In our systematic studies on the oxidation of implant metals in the presence of biologically important compounds, we have explored the systems containing 1hydroxymethyl-3,5-dimethylpyrazole (L) as one of the substrates.…”

“…Vanadyl complexes with N-donor ligands such as a pyrazole derivatives have shown very interesting biochemical and pharmacological properties such as insulin-mimetic properties 5 , as well as antiparasitic 3d and antitumour ones. [10][11][12][13][14][15] N-substitued pyrazole derivatives such as N,N-bis(pyrazolylmethyl)amines are pincer ligands and analogues of poly(pyrazolyl)borates, called scorpionates. 8 Moreover, many pyrazolyl complexes have been prepared and probed for therapeutic actions across a spectrum of diseases and anticancer properties comparable with cis-dichlorodiamineplatinium(II) (cisplatin).…”

Four Alkoxohexavanadate-Based Pd-Polyoxovanadates as Robust Heterogeneous Catalysts for Oxidation of Benzyl-Alkanes

“…10,13 Our previous work displayed that the combination of Pd-complex cation and Keggin-type polyanions could lead to excellent catalytic activity. 17 With this in mind, the Pd-complex was selected as countercation to couple with alkoxohexavanadate cluster through electrostatic interaction and as a result four novel ■ RESULTS AND DISCUSSION Synthesis.…”

“…11 Further absorption bands located in the 550−650 cm −1 region are attributed to V−O−V bending. 10 The bands in the 940− 950 cm −1 region are assigned to VO vibration, 750−785 cm −1 region to V−O−V bridging fragments, and 650−690 cm −1 region to V-OCH 3 fragments, respectively. 10,18 In addition, the infrared spectra in the range 1100−1650 cm −1 are associated with the CC and CN ring stretches of the N-donor ligands.…”

“…The eight μ 2 -methoxo groups are symmetrically arranged around central oxygen atom of [V 6 O 11 (OMe) 8 ] 2− core (Figure 2 left). To balance the charge of the anion in 2, a mixed-valence state of vanadate anion containing two V IV and four V V are needed, which is also identified by both BVS calculations (Table S1, Supporting Information) and X-ray photoelectron spectroscopy (XPS) analysis ( Figure S2 10 Crystal Structure of 3. Interestingly, by lowering the crystallization temperature, compound 3 was isolated, which contains two [Pd(dpa)(acac)] + cations, one [V 6 O 11 (OMe) 8 ] 2− polyanion, and one lattice water molecule.…”