Synthesis, X-ray structure, and spectroscopic investigation of new Co(II)/Cd(II) complexes formed via the reaction of 1-hydroxymethyl-3,5-dimethylpyrazole and Co0, CdCl2, NH4I

Abstract

The novel complex [Co(L)Cl] 2 [CdI 4 ] obtained in situ from the redox system (Co 0 , CdCl 2 , NH 4 I, 1-hydroxymethyl-3,5-dimethylpyrazole) was characterized by X-ray diffraction IR, UV-VIS as well as magnetic and thermal investigations. The ligand, tris(1-(3,5-dimethylpyrazolylmethyl)amine (L) was synthesized in situ as a product of condensation 1-hydroxymethyl-3,5-dimethylpyrazole and ammonia molecule formed during redox process. The crystal structure of 1 includes in the unit cell two chemically identical but symmetry-independent cations: [Co(1)(L)Cl] ? and [Co(2)(L)Cl] ? . Each of the [Co(L)Cl] ? complex ions has C 3 point group symmetry, but the point group symmetry of the trigonal bipyramidal coordination spheres of [CoN 3 N 0 Cl] and tetrahedral sphere of [CdI 4 ] has C 3v point group symmetry.

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.…”

“…[10][11][12][13][14][15] The reagents: VOSO 4 ·5H 2 O, 1-hydroxymethyl-3,5-dimethylpyrazole, NH 4 SCN and metallic chromium powder (325 mesh) were used in 1: 2:6:1 molar ratio, respectively. [10][11][12][13][14][15] The reagents: VOSO 4 ·5H 2 O, 1-hydroxymethyl-3,5-dimethylpyrazole, NH 4 SCN and metallic chromium powder (325 mesh) were used in 1: 2:6:1 molar ratio, respectively.…”

“…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).…”

Interplay of thermochemistry and Structural Chemistry, the journal (volume 21, 2010) and the discipline

“…In the next paper, Adach et al [93] report synthesis, characterization, and X-ray crystal structure of a novel cobalt(II) complex [Co(L)Cl] 2 [CdI 4 ] (L = tris(1-(3,5-dimethylpyrazolylmethyl)amine) obtained in situ from the redox system (Co 0 , CdCl 2 , NH 4 I, 1-hydroxymethyl-3,5-dimethylpyrazole). Diverse isomers exchanging the halogens Cl and I may be suggested: what determines the formation of the above iodocadmate?…”

Ternary complexes of copper(II) and cobalt(II) involving nitrite/pyrazole and tetradentate N4-coordinate ligand: Synthesis, characterization, structures and antimicrobial activity

“…There are many reports on tripodal ligands based on nitrogen containing 28 heterocyclic molecules such as pyrazole and their transition metal complexes [7][8][9][10][11][12][13]. Pyrazole presence of tripodal ligands [14][15][16][17][18][19][20][21][22].…”