Some salientfeatures of platinum group metal compounds with sulfur, selenium or tellurium, known as chalcogenides, primarily focusing on binary compounds, are described here. Their structural patterns rationalised in terms common systems. applications these catalysis and materials science described, emerging trends designing molecular precursors for the syntheses highlighted.

Selenium deficiency increases pathogenicity of RNA viruses. While dietary selenium supplementation has been practiced clinically, synthetic compounds are under evaluation for their antiviral activity, important classes discussed in this essay.

3,3′-Diselenodipropionic acid (DSePA), a derivative of selenocystine, has been synthesized and examined for antioxidant activity, glutathione peroxidase (GPx) cytotoxicity. The effect DSePA on membrane lipid peroxidation, release hemoglobin, intracellular K+ ion as consequence erythrocyte (red blood cells or RBCs) oxidation by free radicals generated 2,2′-azobis(2-amidinopropane) hydrochloride (AAPH) were used to evaluate the ability. Lipid hemolysis, loss in RBCs assessed, respectively,...

Elevated MPO (myeloperoxidase) levels are associated with multiple human inflammatory pathologies. catalyses the oxidation of Cl−, Br− and SCN− by H2O2 to generate powerful oxidants hypochlorous acid (HOCl), hypobromous (HOBr) hypothiocyanous (HOSCN) respectively. These species antibacterial agents, but misplaced or excessive production is implicated in tissue damage at sites inflammation. Unlike HOCl HOBr, which react targets, HOSCN targets cysteine residues considerable selectivity. In...

The complexes, [Cu{EC(5)H(3)(R-3)N}](4) (E/R = Se/Me or Te/R; R H Me) were isolated by the reaction between CuCl and NaEC(5)H(3)(R-3)N characterized elemental analyses, uv-vis NMR ((1)H, (13)C) spectroscopy. crystal structures of [Cu{SeC(5)H(3)(Me-3)N}](4) [Cu(TeC(5)H(4)N)](4) revealed that molecules are tetrameric in which each copper atom lies at vertex tetrahedron face is capped bridging pyridylchalcogenolate ligand. Thermal behavior these complexes was studied thermogravimetric analysis....

Selenonicotinamide, 2,2'-diselenobis[3-amidopyridine] (NictSeSeNict) exhibits glutathione-peroxidase (GPx)-like activity, catalyzing the reduction of hydrogen peroxide (H2O2) by glutathione (GSH). Estimated reactivity parameters for reaction selenium species, according to Dalziel kinetic model, towards GSH (ϕGSH) and H2O2 (ϕH2O2), indicated that rate constant NictSeSeNict with is higher as compared H2O2, indicating activity initiated reduction. (77)Se NMR spectroscopy, HPLC analysis, mass...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhenylarsenic(III) and phenylantimony(III) bis(dialkyl dithiophosphates): synthesis multinuclear (proton, carbon-13, phosphorus-31) NMR mass spectral studies. Crystal molecular structures of C6H5M[S2P(OCHMe2)2]2 [M = Sb(III) As(III)]Rajesh K. Gupta, Audhesh Rai, Ram C. Mehrotra, Vimal Jain, Bernard F. Hoskins, Edward R. T. TiekinkCite this: Inorg. Chem. 1985, 24, 20, 3280–3284Publication Date (Print):September 1, 1985Publication History Published...

Reactions of SbCl3 and BiCl3 with M′Se–C5H3(R-3)N (M′ = Li or Na; R H Me) gave homoleptic selenolate complexes the general formula [M{Se–C5H3(R-3)N}3] (M Sb Bi). The were characterized by elemental analysis, UV-vis NMR (1H, 13C 77Se) spectroscopy. single crystal X-ray analysis [M{Se–C5H3(Me-3)N}3]·nH2O (M/n Sb/1.5 Bi/0.5) revealed that antimony complex adopts a trigonal pyramidal configuration monodentate ligands while bismuth analogue acquires distorted square defined two chelating one...

Reactions of R(2)SnCl(2) (R = Me, Et, (t)Bu) with NaSeC(5)H(3)(R'-3)N (R' H or Me) gave complexes the composition [R(2)Sn{2-SeC(5)H(3)(R'-3)N)}(2)], which on treatment afforded chloro complexes, [R(2)Sn{2-SeC(5)H(3)(R'-3)N}Cl]. These were characterized by elemental analyses and UV-vis NMR ((1)H, (13)C, (77)Se (119)Sn) spectroscopy. The crystal structures [R(2)Sn(SeC(5)H(4)N)(2)] Me [Me(2)Sn{2-SeC(5)H(3)(Me-3)N}Cl] determined single X-ray diffraction. tin atom in former two acquires a skew...

A series of 2-(3,5-dimethylpyrazol-1-yl)ethylseleno derivatives has been synthesized. The glutathione peroxidase like catalytic activity these compounds studied in a model system, which reduction hydrogen peroxide with dithiothreitol (DTTred), the presence an organoselenium compound was investigated by 1H NMR spectroscopy. All exhibit GPx activities and reaction proceeds through selenoxide intermediate, identified 77Se{1H}

Treatment of Na2PdCl4 or [MCl2(PhCN)2] with bis(4-pyridyl)diselenide yielded an insoluble product composition [MCl2(4,4′-(C5H4N)2Se2)]n (1). The reactions one and two eq. Na(4-SeC5H4N) afforded products [PdCl(4-SeC5H4N)]n (2) [Pd(4-SeC5H4N)2]n (3), respectively. On treatment PPh3, 2 3 gave trans-[PdCl(4-SeC5H4N)(PPh3)2] (4a) trans-[Pd(4-SeC5H4N)2(PPh3)2] (5a), oxidative addition to Pt(PPh3)4 exclusively trans-[Pt(4-SeC5H4N)2(PPh3)2] (5b). cis-[PtX2(PR3)2] 5b (X = Cl)...

Abstract Remarkable and unique properties of main group chalcogenides have been exploited for diverse applications owing to their semiconducting with a wide range band gaps high absorption coefficients. The scope horizon utility is further expanded by modulating the size nanometre dimensions as well number layers in 2-D layered materials. A these materials, like CdTe, CuInSe 2 , HgCdTe, In S 3 PbTe, Bi Te etc., are used several commercial devices, but either scarce availability earth crust...

Bis[2-(dimethylamino)ethyl] diselenide was prepared by the reaction of Na2Se2 with ClCH2CH2NMe2. 2-(Dimethylamino)ethaneselenolate complexes palladium(II) type [PdCl(SeCH2CH2NMe2)]31, [PdCl(SeCH2CH2NMe2)(PR3)] 2, [Pd2Cl3(SeCH2CH2NMe2)(PR3)2] 3 and [Pd(SeCH2CH2NMe2)2(PPh3)2] 4 have been synthesized characterized elemental analysis, IR NMR (1H, 31P, 77Se) spectroscopy. The structures orange 1 violet (λmax = 514 nm) 2c established single crystal X-ray diffraction analyses. trimer contains a...

The structurally characterized (abpy)PtCl2, abpy = 2,2'-azobispyridine, reveals a strong metal/ligand pi interaction as supported by DFT calculations. Unexpectedly, its chemical or electrochemical reduction occurs irreversibly to yield EPR-detectable [(micro,eta2:eta2-abpy)[PtCl2]2]*- and, the main product of chloride dissociation, identified and DFT-calculated dinuclear [(micro,eta2:eta1-abpy)PtCl]2(2+) with novel coordination mode for isolated tetrachlorozincate. Stepwise reversible...