共查询到20条相似文献,搜索用时 46 毫秒
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M. T. Ben Dhia M. A. K. Sanhoury K. Essalah M. R. Khaddar 《Phosphorus, sulfur, and silicon and the related elements》2013,188(9):1922-1931
Abstract Four octahedral complexes of the type SnCl4.2L [L = (R2N)3P(E): E = Se; R = Me(1), Et(2) and E = S; R = Me(3), Et(4)] have been studied in solution by multinuclear (31P, 77Se, and 119Sn) NMR spectroscopy. 31P and 77Se NMR data were informative of changes associated with complex formation. The solution structure of the complexes was confirmed by their 119Sn NMR spectra that showed two triplet features for each complex, attributed to a mixture of the expected cis and trans isomers. The triplet signal is due to the coupling with two equivalent phosphorus atoms, consistent with an octahedral geometry around the tin center. In addition, density functional theory (DFT)/B3LYP calculations have been carried out to support the interpretations of NMR data. The results are discussed and compared with those reported for related complexes. GRAPHICAL ABSTRACT 相似文献
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Laura Cortés Coco K. Y. A. Okio Pedro F. B. Brandão 《Phosphorus, sulfur, and silicon and the related elements》2013,188(6):1356-1360
Abstract The reaction of Me2SnCl2 with dithizone or thiosemicarbazide produced two novel di-organotin derivatives in good yields, which were characterized by X-ray diffraction. The crystal structures show that the compounds present a distorted pentacoordinated tin(IV) metal center. The antimicrobial activity of the new compounds was studied against Gram-negative (Escherichia coli, Klebsiella pneumonia, Salmonella enteritidis) and Gram-positive (Staphylococcus aureus) bacteria, and the yeast Saccharomyces cerevisiae. It was observed that the coordination of tin metal has a pronounced effect on the microbial activities of the ligands. All the tin complexes have shown higher antimicrobial effect than the free ligands. GRAPHICAL ABSTRACT 相似文献
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Ravi Shankar Archana Jain Atul Pratap Singh Kieran C. Molloy 《Phosphorus, sulfur, and silicon and the related elements》2013,188(6):1375-1378
Abstract Mixed-ligand diorganotin complexes, R2Sn(L)(L1), bearing hydrogenphosphonate and alkanesulfonate ligands as well as trinuclear tin clusters of the composition [(R2Sn)3(R1PO3)2(L1)2] are the simple molecular constructing units for the synthesis of a wide variety of organotin based two- and three-dimensional coordination polymers. Synthetic aspects and structural chemistry of these new classes of metal-organic frameworks (MOFs) are presented. GRAPHICAL ABSTRACT 相似文献
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Neeraj Sharma Vijay Kumar 《Phosphorus, sulfur, and silicon and the related elements》2013,188(10):2071-2085
Abstract Diorganotin(IV) complexes R2Sn(OC6H4Me-4)2 (R = Ph, Me, and n-Bu) have been synthesized in good yields by the reaction of Ph2SnCl2, n-Bu2SnCl2, and Me2SnCl2 with NaOC6H4Me-4, while complex n-Bu2SnCl(OC6H4Me-4) has been obtained from the reaction of n-Bu2SnCl2 with 4-methylphenol in the presence of triethylamine in carbon tetrachloride. The complexes have been characterized by elemental analyses, molar conductance measurements, molecular weight determination, IR, 1H, 13C, and 119Sn NMR spectroscopy as well as by mass spectrometry. The reactions of the complexes with 2- and 3-cyanoanilines yielded 1:2 coordination compounds authenticated by physicochemical as well as by IR, 1H, and 13C NMR spectroscopic data. The bases behaved as monodentate ligands wherein 2-cyanoaniline is bonded through nitrile nitrogen atom, while 3-cyanoaniline is coordinated through amino nitrogen atom. The diorganotin(IV) complexes have also been screened for their antibacterial activity against Escherichia coli, Staphylococcus aureus, Staphylococcus epidermidis, Shigella flexneri, Proteus mirabilis, and Pseudomonas aeruginosa. The minimum inhibitory concentration values of these complexes show enhanced activity. [Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements for the following free supplemental resource: Scheme S1, S2, and Table S1] GRAPHICAL ABSTRACT 相似文献
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Rositca D. Nikolova 《Phosphorus, sulfur, and silicon and the related elements》2013,188(8):1626-1634
Abstract (2-Oxo-2H-chromen-3-yl)phosphonic acid monoethyl ester trihydrate (1) was synthesized, isolated, and spectroscopically as well as structurally characterized by means of single crystal X-ray diffraction; conventional and linear-polarized IR spectroscopy; electronic (UV-VIS-NIR) spectroscopy; 1H, 13C, and 31P NMR. Quantum chemical DFT calculations have been performed in order to obtain information on the electronic structure and vibrational properties of 1, thus supporting the experimental data. The correlation between the structure and spectroscopic characteristics is discussed. GRAPHICAL ABSTRACT 相似文献
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Deepak Kumar Sharma Yashpal Singh Jyoti Sharma 《Phosphorus, sulfur, and silicon and the related elements》2013,188(9):1194-1204
Abstract Some new monophenylantimony(III) compounds having the formulas have been synthesized by reaction of phenylantimony(III) dichloride with the sodium salt of cyclic dithiocarbamates in 1:1 and 1:2 molar ratios. These newly synthesized compounds have been characterized by elemental analyses, molecular weight measurements, and their plausible structures have been proposed on the basis of IR, NMR (1H and 13C), and ESI-mass studies. Sodium salts of cyclic dithiocarbamates and their corresponding organoantimony(III) derivatives (1–8) have been screened for antimicrobial activity against E. coli, P. aeruginosa (Bacteria) and A. niger and A. flavus (Fungi). 相似文献
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Reena Agrawal Jyoti Sharma Durgesh Nandani Amala Batra Yashpal Singh 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3):471-480
Abstract Chloro-bis(2,2-dithio-1,3,2-dioxaphospholane/dioxaphosphorinane)bismuth(III) compounds have been synthesized by the reaction of bismuth trichloride with sodium 2,2-dithio-1,3,2-dioxaphospholane/dioxaphosphorinane in 1:2 molar ratio in benzene solution. Reactions of these chloro-bis(2,2-dithio-1,3,2-dioxaphospholane/dioxaphosphorinane)-bismuth(III) compounds with sodium tetraisopropoxyborate in equimolar ratio in benzene solution yield the corresponding heterobinuclear bismuth derivatives with boron. All compounds were characterized by elemental analyses and molecular weight measurements. Plausible structures are proposed on the basis of IR and 1H, 11B, 13C, and 31P spectroscopic studies. 2-Mercapto-2-thioxo-1,3,2-dioxaphospholanes-/dioxaphosphorinanes and the corresponding chloro-bis(2,2-dithio-1,3,2-dioxaphospholane/dioxaphosphorinane)bismuth (III) compounds show antifungal activities against Fusarium and Trichoderma. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT 相似文献
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Sebastian Schlecht Walter Frank Manfred Braun 《Phosphorus, sulfur, and silicon and the related elements》2013,188(7):1585-1594
Abstract Tridentate imine ligands that are obtained from the chiral, regioisomeric amino alcohols 2-amino-1,1,2-triphenyethanol and 2-amino-1,2,2-triphenylethanol serve for the formation of bis-chelated silicon complexes. Whereas the complex based on the former amino alcohol is obtained as a diastereomeric mixture, the complex that is derived from 2-amino-1,2,2-triphenylethanol forms in a completely diastereoselective manner, and its configuration is determined as (A,R,R), according to a crystal structure analysis. The new silicon complexes are found to be efficient dopants for the conversion of nematic liquid crystals into cholesteric phases. GRAPHICAL ABSTRACT 相似文献
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Mehmet Gülcan Mehmet Sönmez 《Phosphorus, sulfur, and silicon and the related elements》2013,188(9):1962-1971
Abstract Monobasic tridentate Schiff base ligand having ONS donor sequence was prepared by condensing N-aminopyrimidine-2-thione with o-vanillin. The complexes were formed by reacting ligand and the metal acetates of Cu(II), Ni(II), Co(II), Mn(II), and Cd(II) in methanol to get a series of mononuclear and dinuclear complexes. The characterization of ligand and metal complexes were carried out by elemental analyses, conductivity measurements, magnetic susceptibility data, FTIR, UV-vis, NMR, and API-ES mass spectral data. The structure of the complexes was confirmed on the basis of elemental analyses, magnetic susceptibility, API-ES mass spectral data and thermal gravitational analysis (TGA). GRAPHICAL ABSTRACT 相似文献
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Tahereh Sedaghat Ali Zamani 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3):606-612
Abstract Schiff bases S-benzyl- and S-methyl-β-N-(2-hydroxyphenyl)methylene dithiocarbazate (H2L1 and H2L2, respectively) and S-benzyl- and S-methyl-β-N-(2-chlorophenyl)methylenedithiocarbazate (HL3 and HL4, respectively) were prepared. Then organotin(IV) complexes [SnPh2(L1)] (1), [SnMe2(L1)] (2), [SnPh2(L2)] (3), [SnMe2(L2)] (4), [SnPh2Cl(L3)] (5), and [SnPh2Cl(L4)] (6) were obtained from the reaction of Schiff bases with SnR2Cl2 (R = Ph and Me). The synthesized complexes have been investigated by elemental analysis and IR, 1H NMR, and 119Sn NMR spectroscopy. Spectroscopic studies show that, in complexes 1–4, the Schiff base acts as a tridentate dianionic ligand and coordinates through the thiol group, imine nitrogen, and phenolic oxygen. The coordination number of tin is five. In complexes 5 and 6, the ligand is monoanionic and unidentate, and coordinated only via the thiol group, and the azomethine nitrogen is not involved in coordination to tin. Therefore the coordination number of tin is four. GRAPHICAL ABSTRACT 相似文献
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