Green synthesis of thioxoimidazolidine derivative ligand: Spectroscopic, thermal and biological assignments of new Cu(II), Co(II), and Ni(II) chelates in neutral system

Eco-friendly synthesis of ethyl 3-(4-oxo-3-(1-(pyridin-3-yl)ethylideneamino)-2-thioxoimidazolidin-1-yl)propanoate (4) ligand (L) using microwave irradiation technique was described. The structure of thioxoimidazolidine derivative ligand compound has been established based on different types of analyses such as infrared, 1H-NMR, 13C-NMR, and mass spectra as well as elemental analysis. The copper, cobalt, and nickel(II) complexes with molecular formula [M(L)(H2O)4]Cl2 (where M = Co(II), Ni(II), and Cu(II), L = thioxoimidazolidine derivative ligand), have been prepared and well-characterized using microanalytical, conductivity measurements, magnetic, spectroscopic, and physical analyses. Upon the outcome results of analyses, the stoichiometry of the synthesized complexes is 1:1 (M:L). The molar conductance values concluded that the behavior of metal complexes was electrolytes. The 3-(4-oxo-3-(1-(pyridin-3-yl)ethylideneamino)-2-thioxoimidazolidin-1-yl)propanoate chelate acts as a monovalent bidentate fashion via nitrogen and oxygen atoms of both thioxoimidazolidine and propanoate ester moieties. The geometric structures of the synthesized metal complexes are an octahedral configuration based on spectroscopic and magnetic moment studies. The thermogravimetric assignments deduced that the presence of four coordinated water molecules. The synthesized copper(II), cobalt(II), and nickel(II) complexes were biologically checked against G+ and G- bacteria and two species of fungi (Aspergillus Nigaer, and Penicillium Sp.).

Cyclometalated Ir(III) complexes as potential electron acceptors for organic solar cells

Cyclometalated Iridium(III) complexes have been investigated as promising electron donor (D) materials in organic solar cells (OSCs) due to the unique octahedral configuration for optimized morphology and significantly long lifetimes...

Effect of impurities and disordering on the photoluminescence of crystals and glasses in the system Li2O - 7GeO2

The work is devoted to the study of photoluminescence spectra of weakly polar ferroelectric crystals Li2Ge7O15 and Li2O – 7GeO2 glasses. For all initial samples was observed the wide intensive luminescence band with maximum in the region of 525–550 nm. The spectral distribution of intensity and the position of the maximum of the band for a Li2Ge7O15 crystal depended on the excitation wavelength (λex=405 nm or 365nm were used). The spectral profile of the luminescence band was broadened in glass containing of 0.67% copper. The intensity of the luminescence band was decreased 6 times for glass doped with Cr3+ ions (0.01%) as compared with glass containing Cu2+ ions. The intense luminescence band of Cr3+ ions with λmax=659nm was appeared starting from 600. The assumption about the nature of the broad luminescence band observed in both nominally pure and doped glasses and crystals was made: the source of luminescence can be germanium - oxygen complexes [GeO4] and [GeO6] of the tetrahedral and octahedral configuration in the material structure.

Crystal structure of hexakis(dimethyl sulfoxide-κO)cobalt(II) bis[trichlorido(quinoline-κN)cobaltate(II)]

There are few reports that describe crystal structures of compounds containing cobalt complexed to either dimethyl sulfoxide (Me2SO) or quinoline (C9H7N). The title compound, [Co(C2H6OS)6][CoCl3(C9H7N)]2, is a cobalt salt in which the metal ion is complexed to both Me2SO and quinoline. In particular, we observed that anhydrous cobalt(II) chloride reacts with quinoline in Me2SO to form a salt that is to be formulated as [CoII(Me2SO)6]2+{[CoIICl3quinoline]2−}. The CoIIatom in the cation portion of this molecule lies on a inversion center and is bound to the O atoms of six Me2SO moieties in an octahedral configuration, while the CoIIatom in the anion is attached to three chloride ligands and one quinoline moiety in a tetrahedral arrangement.

Crystal structure of hexakis(dimethyl sulfoxide-κO)manganese(II) diiodide

The asymmetric unit of the title salt, [Mn(C2H6OS)6]I2, consists of one MnIIion, six O-bound dimethyl sulfoxide (DMSO) ligands and two I−counter-anions. The isolated complex cations have an octahedral configuration and are grouped in hexagonally arranged rows extending parallel to [100]. The two I−anions are located between the rows and are linked to the cations through two weak C—H...I interactions.

Crystal structure of bis(tetraphenylphosphonium) bis(cyanido-κC)(29H,31H-tetrabenzo[b,g,l,q]porphinato-κ4N29,N30,N31,N32)ferrate(II) acetone disolvate

The crystal structure of the title compound, (C24H20P)2[Fe(C36H20N4)(CN)2]·2C3H6O, is constructed from a tetrahedral Ph4P+(tetraphenylphosphonium) cation, one [Fe(tbp)(CN)2]2−anion (tbp = tetrabenzoporphyrin in its doubly deprotonated form), located on a centre of inversion, and an acetone molecule as crystallization solvent. Since the molecular structure of theM(tbp) moiety is insensitive to the kind of metal ion and its oxidation state, bond lengths and angles in the [Fe(tbp)(CN)2]2−anion are similar to those in otherM(tbp) compounds. The Fe2+ion, located on a centre of inversion, is coordinated by four N atoms of tpb in the equatorial plane and by two C atoms of the cyanide anion at axial positions in a slightly distorted octahedral configuration. The packing is stabilized by C—H...N interactions between the Ph4P+cation and the CN−ligand of the [Fe(tbp)(CN)2]2−anion, and by C—H...π interactions between the Ph4P+cation, acetone solvent molecules and the [Fe(tbp)(CN)2]2−anion.

Structure Studies on Order Assemblage of CadmiumII Isophthalicacid Benzimidazole Complexes

The CadmiumII Isophthalicacid Benzimidazole complex [Cd2(C8H4O4)2 (C7H6N2)4(H2O)3], Triqua-bis (isophthalicacidato-O,O')-tetra (benzimidazole) bis (CadmiumII),the CdII atom is coordinated by two isophthalicacid anions and two benzimidazole and one water molecule in a distorted octahedral configuration with six-coordinations geometry. And one isophthalicacid ligand chelates to the CdII atom through its one carboxylic O atoms, but the other isophthalicacid ligand chelates to the CdII atom through its two carboxylic O atoms. The same as another CdII atom. So we get a Binuclear CdII metal complexe. The fact clearly suggests not so much significant contribution from the electrostatic interaction in the Cd-O bonding in bidentate Binuclear CdII metal complexes as we gotten in mononuclear MnII metal complexes. Adjacent complex link to each other via hydrogen bonds forming the three-dimensional supramolecular structure.

Bis(cyclohexylammonium) tetrachloridodiphenylstannate(IV)

The title compound, (C6H14N)2[Sn(C6H5)2Cl4], contains cyclohexylammonium cations in general positions and a stannate(IV) anion that is located on a twofold rotation axis. The SnIVatom in the complex anion is surrounded by four Cl−ligands and twotrans-phenyl groups in a distorted octahedral configuration. The anions are connected with the cations through N—H...Cl hydrogen bonds. Every cation is involved in three N—H...Cl bonds to the chloride ligands of three different anions, and each chloride ligand is linked to two cations. This arrangement leads to a layered structure parallel to (010).

catena-Poly[[bis(pyridine-κN)nickel(II)]-di-μ-thiocyanato-κ2N:S;κ2S:N]

In the title compound, [Ni(NCS)2(C5H5N)2]n, the Ni2+cation is coordinated by four thiocyanate anions (μ-1,3) and two pyridine ligands within a slightly distorted octahedral configuration. The Ni—N bond lengths to the pyridine rings are 2.1189 (17) and 2.1241 (17) Å, whereas those to the thiocyanate anions are 2.0299 (18) and 2.0359 Å. The Ni—S bond lengths are 2.5357 (6) and 2.5568 (6) Å. The Ni2+cations are linked byN:S-bridging thiocyanate ligands into chains extending along [010]. The Ni...Ni distance within the chains is 5.5820 (5) Å. The asymmetric unit contains two Ni2+cations of which one is located on a centre of inversion, whereas the second is located on a general position.