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Journal articles on the topic 'Transition metals and their compounds'

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Published: 4 June 2021
Last updated: 5 February 2022

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1

Krauss, H. L., and G. Langstein. "Surface compounds of transition metals." Journal of Molecular Catalysis 65, no. 1-2 (March 1991): 101–12. http://dx.doi.org/10.1016/0304-5102(91)85087-i.

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2

Xing, Qiwu, Hans L. Krauss, and Wolfgang Milius. "Surface compounds of transition metals." Journal of Molecular Catalysis 90, no. 1-2 (May 1994): 75–80. http://dx.doi.org/10.1016/0304-5102(93)e0362-k.

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3

Wisian-neilson, P., K.-T. Nguyen, T. Wang, S. Rippstein, C. Claypool, and F. J. Garcia-alonso. "Phosphorus-Nitrogen Compounds Incorporating Transition Metals." Phosphorus, Sulfur, and Silicon and the Related Elements 87, no. 1-4 (February 1994): 277–85. http://dx.doi.org/10.1080/10426509408037460.

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4

Koksharova, T. V., T. V. Mandzii, T. S. Skakun, and Yu A. Anisimov. "TRANSITION METALS COORDINATION COMPOUNDS WITH BENZOHYDRAZID." Odesa National University Herald. Chemistry 22, no. 1(61) (March 3, 2017): 79–94. http://dx.doi.org/10.18524/2304-0947.2017.1(61).94714.

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5

Holloway, Clive, and Milan Melnik. "Crystallographic and structural characterisation of heterometallic platinum compounds: Part I. Heterobinuclear Pt compounds." Open Chemistry 9, no. 4 (August 1, 2011): 501–48. http://dx.doi.org/10.2478/s11532-011-0054-2.

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AbstractThis review covers almost 290 heterobinuclear Pt derivatives. When the heterometals (M) are non transition and the binuclear are found both with and without a metal to metal bond. Where M is a transition metal or actinide, only those with a metal-metal bond have been included here. There are thirteen non-transition metals (Sn, Hg, Ge, Sb, Tl, Zn, Pb, Cd, Na, K, Ga, Ca and In). The shortest Pt-M bond distance is 235.2(1) (Pt-Ge). There are eighteen transition metals (Fe, W, Rh, Re, Pd, Ag, Ir, Mo, Mn, Re, Co, Cu, Cr, Au, Ni, Ti, Ta and V). The shortest Pt-M bond distance is 249.5(2) pm (Pt-Cr). There is one example of an actinide, Pt-Th at 298.4(1) pm. The Pt atom has oxidation numbers 0, +2 and +4. The Pt coordination geometries include square planar (most common), trigonal bipyramidal, pseudo octahedral (Pt(IV)) and a few prevalently capped trigonal prismatic seven coordinate species. There are at least two types of isomerism distortion and polymerisation. Factors affecting bond lengths and angles are discussed and some ambiguities in coordination polyhedra are outlined.
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6

Ghedini, M., S. Armentano, R. Bartolino, F. Rustichelli, G. Torquati, N. Kirov, and M. Petrov. "New Liquid Crystalline Compounds Containing Transition Metals." Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics 151, no. 1 (October 1987): 75–91. http://dx.doi.org/10.1080/00268948708075321.

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7

Davis, L. C. "Photoemission from transition metals and their compounds." Journal of Applied Physics 59, no. 6 (March 15, 1986): R25—R64. http://dx.doi.org/10.1063/1.336323.

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8

Koksharova, T. V. "ANIONS FUNCTIONS IN TRANSITION METALS COORDINATION COMPOUNDS." Odesa National University Herald. Chemistry 21, no. 1(57) (April 26, 2016): 6. http://dx.doi.org/10.18524/2304-0947.2016.1(57).67508.

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9

Melník, Milan, Peter Mikuš, and Clive Holloway. "Crystalographic and structural characterization of heterometallic platinum compounds. Part III: heterotrinuclear compounds." Open Chemistry 11, no. 6 (June 1, 2013): 827–900. http://dx.doi.org/10.2478/s11532-013-0226-3.

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AbstractThis review article includes over three hundred and sixty heterotrinuclear platinum complexes of the composition Pt2M (205 examples), PtM2 (132 examples) and PtMM (24 examples). The heterometals include the non-transition and transition metals. Three metal atoms form a wide variability of frameworks: M3 triangular, dicapped M3 triangular, V shaped M3, M3 linear, five-, six- and seven- metallocycles and unique structures of which triangular and linear are the most common. This has led to a rich chemistry of platinum not only from variability of metals, but also from their framework and stereochemistry. The shortest Pt-M (non-transition) and Pt-M (transition) bonds are 2.315(1) Å for Pt-Ga and 2.4896(9) Å for Pt-Co. The shortest Pt-Pt bond distance is 2.581(1) Å. Two complexes exist in two isomeric forms and several others contain crystallographically independent molecules. All are typical examples of distortion isomerism. Correlations between structural parameters, heterometal and ligand donor atoms are developed and discussed.
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10

Alsayeed, Raghda, Dalia Mahmood Jamil, Huda Ghalib Salman, and Mohammed H. Al-Mashhadani. "Synthesis of Novel Trimethoprim Complexes and Their Analysis by Ultraviolet Derivative Spectroscopy." Materials Science Forum 1021 (February 2021): 200–209. http://dx.doi.org/10.4028/www.scientific.net/msf.1021.200.

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In this research, the actions of antibiotic trimethoprim alone and with metals combained. Then assayed through formation of base transition metal compounds as ligands have the chance to achieve an unusual arrangement and stability complexes of coordination. We show advancement in using transtional metal compounds medications for treamentt manyl human illnesses such as carcinomas, lymphomas, control of infections, anti-inflammatory disorders, diabetes, with neurological conditions. This combination with transition metal observed the interaction can be separated by derivative spectroscopic method and measure the characterization of compound by IR and UV spectroscopy.
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11

Young, Charles G. "Mixed-valence compounds of the early transition metals." Coordination Chemistry Reviews 96 (November 1989): 89–251. http://dx.doi.org/10.1016/0010-8545(89)80032-3.

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12

Patel, Dhimant K., David M. Thompson, Michael C. Baird, Laurence K. Thompson, and Keith F. Preston. "Fulleride compounds of the transition metals: NaCoC60 · 3THF." Journal of Organometallic Chemistry 545-546 (January 1997): 607–10. http://dx.doi.org/10.1016/s0022-328x(97)00401-4.

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13

Sitar, Jennifer, Abdessadek Lachgar, Hermann Womelsdorf, and H. Jürgen Meyer. "Niobium Cluster Compounds with Transition Metals: K2Mn[Nb6Cl18]." Journal of Solid State Chemistry 122, no. 2 (March 1996): 428–31. http://dx.doi.org/10.1006/jssc.1996.0136.

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14

Pierloot, K. "Transition metals compounds: Outstanding challenges for multiconfigurational methods." International Journal of Quantum Chemistry 111, no. 13 (March 22, 2011): 3291–301. http://dx.doi.org/10.1002/qua.23029.

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15

Sun, Yujun, Michael Fenster, Annie Yu, Richard M. Berry, and Dimitris S. Argyropoulos. "The effect of metal ions on the reaction of hydrogen peroxide with Kraft lignin model compounds." Canadian Journal of Chemistry 77, no. 5-6 (June 1, 1999): 667–75. http://dx.doi.org/10.1139/v99-036.

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Peroxide bleaching is significantly affected by transition and alkaline earth metals. Isolating the effects of different transition and alkaline earth metals on the reactions of peroxide with different representative lignin structures allows the separation of the positive from the negative contributions of these metal ions. In this work, five monomeric or dimeric phenolic lignin model compounds were treated with alkaline hydrogen peroxide in the absence or presence of Mn2+, Cu2+, Fe3+, and Mg2+. We followed the disappearance of the starting material and the progress of demethylation, radical coupling and oxalic acid formation were followed. Transition metals increased the reactivities of all the lignin model compounds with hydrogen peroxide in the order Mn2+ > Cu2+ > Fe3+, which is the same as the order of activity toward peroxide decomposition while Mg2+ stabilized the system. Demethylation, radical coupling, and oxalic acid formation were all increased by the presence of transition metals in the system and decreased by the addition of Mg2+. The acceleration of the total degree of reaction and of the demethoxylation reactions improves peroxide bleaching, but the increase in the radical coupling reactions can affect the further bleachability of pulp while the increase in the formation of oxalic acid could lead to a greater probability of scaling.Key words: lignins, hydrogen peroxide, peroxide bleaching, reactivity, chemical pulps, metal compounds, alkali treatment, transition metals, delignification.
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16

Izakovich, E. N., and M. L. Khidekel'. "Coordination Compounds of Transition Metals in the Chemistry of Aromatic Nitro-compounds." Russian Chemical Reviews 57, no. 5 (May 31, 1988): 419–32. http://dx.doi.org/10.1070/rc1988v057n05abeh003360.

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17

Kostrin, D. K., and A. A. Lisenkov. "Synthesis of Transition Metals Carbide Compounds in the Vacuum Arc Discharge Plasma." Materials Science Forum 870 (September 2016): 371–76. http://dx.doi.org/10.4028/www.scientific.net/msf.870.371.

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To implement the plasmochemical synthesis of transition metals (Ti, Zr, Mo, W) carbide compounds in a plasma flux of the vacuum arc the discharge carbonaceous working gas is infused. It is shown that the composition of the initial carbonaceous gas defines both the carbon output, and the nature and course of the carbide compounds formation chemical reaction. The composition analysis of the plasma flux in the course of the coating evaporation was carried out by means of the developed emissive spectral analyzer. The result shows that a considerable part of transition metals carbide phases has wide zones of homogeneity within which the change in the carbon content happens without the crystalline grid reorganization. The work reveals and analyzes the factors defining quality of the received carbide compounds (TiC, ZrC, MoC, WC) of refractory metals in a flux of metal plasma of the vacuum arc discharge.
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18

Gusev, Aleksandr I., and Svetlana Z. Nazarova. "Magnetic susceptibility of nonstoichiometric compounds of transition d-metals." Physics-Uspekhi 48, no. 7 (July 31, 2005): 651–73. http://dx.doi.org/10.1070/pu2005v048n07abeh002085.

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19

Gusev, Aleksandr I., and Svetlana Z. Nazarova. "Magnetic susceptibility of nonstoichiometric compounds of transition d-metals." Uspekhi Fizicheskih Nauk 175, no. 7 (2005): 681. http://dx.doi.org/10.3367/ufnr.0175.200507a.0681.

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20

Danilovich, I. L., O. S. Volkova, and A. N. Vasiliev. "Magnetism of polyanionic compounds of transition metals (Review Article)." Low Temperature Physics 43, no. 5 (May 2017): 529–42. http://dx.doi.org/10.1063/1.4985210.

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21

IVANOV, V. A., and R. O. ZAITSEV. "NONPHONON MECHANISM OF SUPERCONDUCTIVITY IN COMPOUNDS OF TRANSITION METALS." International Journal of Modern Physics B 03, no. 09 (September 1989): 1403–23. http://dx.doi.org/10.1142/s0217979289000907.

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The kinematical mechanism of superconductivity is applied to the Emery-Hirsch model for the CuO 2 and BiO 3 layers. A superconducting region due to strong kinematic interaction of p- and s, d-electrons are determined as a function of np and ns,d-degrees of non-filling of 2p6, 6s2, 3d10 shells of O 2−, Bi 3+, Cu +. The T c is calculated taking into account the spin flip relaxation time. Magnetostatic properties of a superconducting state in a weak magnetic field are investigated. Coefficients of the Ginzburg-Landau equation are calculated. The ground state energy of the Emery-Hirsch model is also calculated.
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22

To, Wai-Pong, Taotao Zou, Raymond Wai-Yin Sun, and Chi-Ming Che. "Light-induced catalytic and cytotoxic properties of phosphorescent transition metal compounds with a d 8 electronic configuration." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 371, no. 1995 (July 28, 2013): 20120126. http://dx.doi.org/10.1098/rsta.2012.0126.

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Transition metal compounds are well documented to have diverse applications such as in catalysis, light-emitting materials and therapeutics. In the areas of photocatalysis and photodynamic therapy, metal compounds of heavy transition metals are highly sought after because they can give rise to triplet excited states upon photoexcitation. The long lifetimes (more than 1 μs) of the triplet states of transition metal compounds allow for bimolecular reactions/processes such as energy transfer and/or electron transfer to occur. Reactions of triplet excited states of luminescent metal compounds with oxygen in cells may generate reactive oxygen species and/or induce damage to DNA, leading to cell death. This article recaps the recent findings on photochemical and phototoxic properties of luminescent platinum(II) and gold(III) compounds both from the literature and experimental results from our group.
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23

Ohkubo, Isao, and Takao Mori. "dz2 orbital character of polyhedra in complex solid-state transition-metal compounds." Dalton Transactions 49, no. 2 (2020): 431–37. http://dx.doi.org/10.1039/c9dt04091a.

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dz2 orbitals of the transition metals make major contributions to electronic structures near the Fermi levels in d0-, d1-complex transition-metal compounds containing face-sharing, edge-sharing octahedra, or edge-sharing trigonal prismatic layers.
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24

Sidorov, Alexey A., Mikhail A. Kiskin, Alexander E. Baranchikov, Vladimir K. Ivanov, and Igor L. Eremenko. "Methods for Synthesis of Molecular Materials with Unique Physical Properties." Vestnik RFFI, no. 2 (June 25, 2019): 82–100. http://dx.doi.org/10.22204/2410-4639-2019-102-02-82-100.

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The authors discovered and investigated new types of stable heterometallic carboxylate complexes in which divalent transition metal atoms of the 4th period of the Periodic Table of Chemical Elements (V, Co, Ni, Cu, Zn) combine with atoms of lithium, magnesium, calcium or rare earth elements. These polynuclear heterometallic compounds retain their structure under conditions when the homometallic compounds of these transition metals decompose to mononuclear complexes. The different metals combination in one molecule allows us to use the obtained heterometallic compounds for producing disperse and film oxide materials, and bimetallic oxide catalysts. The stability of the complexes allows to immobilize them in various matrices and to assemble 3D polymer structures on their base. Since the metal ions under consideration (V, Co, Ni, Cu, Zn) are capable to form isostructural heterometallic compounds, it becomes possible to obtain compounds within a single structural type with a given combination of physical properties, determined by the nature of the metal ions.
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25

Takesue, Naohisa, and Jun-ichi Saito. "Molecular Orbital Calculation of Lead-Free Perovskite Compounds for Efficient Use of Alkaline and Alkaline Earth Metals." Crystals 10, no. 11 (October 22, 2020): 956. http://dx.doi.org/10.3390/cryst10110956.

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The effective ionic charges of lead-free perovskite dielectric complex compounds were investigated with molecular orbital calculation. The base model was a double perovskite cluster that consisted of octahedral oxygen cages with a transition metal ion of titanium, niobium, or zirconium located at each of their centers, and alkali and/or alkaline earth metal ions located at the body center, corners, edge centers, or face centers of the cluster. The results showed significant covalent bonds between the transition metals and the oxygens, and the alkali metals, especially sodium and oxygen. On the other hand, the alkaline earth metals have weak covalency. Calculation was also performed with the replacement of some of the oxygens with chlorine or fluorine; such replacement enhances the covalency of the transition metals. These trends provide good guidelines for the design properties of lead-free perovskite piezoelectrics based on ubiquitous sodium use.
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26

Likhanov, Maxim S., Nikita V. Sytov, Zheng Wei, Evgeny V. Dikarev, and Andrei V. Shevelkov. "Nowotny Chimney Ladder Phases with Group 5 Metals: Crystal and Electronic Structure and Relations to the CrSi2 Structure Type." Crystals 10, no. 8 (August 3, 2020): 670. http://dx.doi.org/10.3390/cryst10080670.

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Nowotny chimney ladder (NCL) phases are intermetallic compounds formed by transition metals and metals of groups 13 and 14. This family can be expanded by combining two p-elements from different groups with those transition metals, for which the corresponding binary NCL phases are unknown. In this paper, we present three new compounds in the V-Al-Ge, Nb-Al-Ge, and Nb-Ga-Ge systems related to the TiSi2 structure type (Sp. Gr. Fddd) obtained with the standard ampule technique. The crystal structures of the new compounds were determined using synchrotron powder X-ray diffraction data. A transition to the CrSi2 structure type was detected upon changing the composition from VAl0.72(2)Ge1.28(2) to VAl1.534(3)Ge0.466(3). According to the 18–n rule, all the compounds are metallic conductors, which was supported by the electronic structure calculations. It was shown that the expected energy gap located above the Fermi level in the vanadium-based NCL compound collapsed into a pseudogap upon the replacement of V by Nb.
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27

Demakov, Pavel A., Artem S. Bogomyakov, Artem S. Urlukov, Aleksandra Yu Andreeva, Denis G. Samsonenko, Danil N. Dybtsev, and Vladimir P. Fedin. "Transition Metal Coordination Polymers with Trans-1,4-Cyclohexanedicarboxylate: Acidity-Controlled Synthesis, Structures and Properties." Materials 13, no. 2 (January 19, 2020): 486. http://dx.doi.org/10.3390/ma13020486.

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Five trans-1,4-cyclohexanedicarboxylate (chdc2−) metal–organic frameworks of transition metals were synthesized in aqueous systems. A careful control of pH, reaction temperature and solvent composition were shown to direct the crystallization of a particular compound. Isostructural [Co(H2O)4(chdc)]n (1) and [Fe(H2O)4(chdc)]n (2) consist of one-dimensional hydrogen-bonded chains. Compounds [Cd(H2O)(chdc)]n∙0.5nCH3CN (3), [Mn4(H2O)3(chdc)4]n (4) and [Mn2(Hchdc)2(chdc)]n (5) possess three-dimensional framework structures. The compounds 1, 4 and 5 were further characterized by magnetochemical analysis, which reveals paramagnetic nature of these compounds. A presence of antiferromagnetic exchange at low temperatures is observed for 5 while the antiferromagnetic coupling in 4 is rather strong, even at ambient conditions. The thermal decompositions of 1, 4 and 5 were investigated and the obtained metal oxide (cubic Co3O4 and MnO) samples were analyzed by X-ray diffraction and scanning electron microscopy.
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28

Zaremba, Roman, Ute Ch Rodewald, Vasyl’ I. Zaremba, and Rainer Pöttgen. "Transition Metal-Indium Substitution in Y3Rh2-type Compounds." Zeitschrift für Naturforschung B 62, no. 11 (November 1, 2007): 1397–406. http://dx.doi.org/10.1515/znb-2007-1108.

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New rare earth metal-rich indium compounds RE3T2−xInx (RE = Gd, Tb, Dy, Ho, Er, Tm; T = Rh, Pd, Ir) were synthesized from the elements via high-frequency melting and subsequent annealing in sealed silica ampoules. These intermetallics crystallize with substitution variants of the tetragonal Y3Rh2-type structure, space group I4/mcm, Z = 28. All samples were studied by powder and single crystal X-ray diffraction: a = 1164.2(2), c = 2486.5(5) pm, for Tb3Rh1.25In0.71, a = 1139.4(2), c = 2480.8(5) pm for Er3Rh1.48In0.52, a = 1153.7(2), c = 2465.4(5) pm for Tm3Rh1.25In0.71, a = 1146.4(2), c = 2498.4(5) pm for Tb3Ir1.62In0.33, a = 1154.9(2), c = 2500.1(5) pm for Tb3Ir1.52In0.44, a = 1187.8(2), c = 2559.2(5) pm for Gd3Pd1.27In0.71, and a = 1169.1(2), c = 2530.3(5) pm for Ho3Pd1.27In0.71. The indium atoms show different site occupancies on the transition metal positions, and for most crystals small defects occur for one transition metal site. Gd3Rh1.30In0.64 (a = 1166.3(2), c = 2512.0(5) pm) and Dy3Rh1.31In0.64 reveal complete rhodium-indium ordering. These two indides crystallize with the translationengleiche subgroup I4/m. The rare earth atoms in these RE3T2−xInx indides have coordination numbers between 13 and 15. A striking structural motif is the tetrahedral indium coordination in the first coordination sphere of the RE5 position (305 pm Gd-In in Gd3Rh1.30In0.64). The transition metal atoms show trigonal prismatic or square anti-prismatic rare earth coordination. In all compounds investigated, the indium atoms substitute these metals only at the square prismatic sites and at one site of coordination number 10. The crystal chemical consequences of the different ordered and statistical transition metal-indium substitutions are discussed
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29

Molenda, J. "Electronic Aspect of Intercalating Alkaline Metals into Transition Metal Compounds." Solid State Phenomena 41 (February 1995): 17–20. http://dx.doi.org/10.4028/www.scientific.net/ssp.41.17.

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30

Kanamori, Junjiro. "Principal Mechanisms Underlying Magnetic Order in Transition Metals and Compounds." Transactions of the Magnetics Society of Japan 1, no. 1 (2001): 1–10. http://dx.doi.org/10.3379/tmjpn2001.1.1.

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31

Chen, Jianlin, Hao Feng, Yaoming Xie, and R. Bruce King. "Bis(methylborole) sandwich compounds of the first row transition metals." Polyhedron 101 (November 2015): 126–32. http://dx.doi.org/10.1016/j.poly.2015.07.011.

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32

Chen, Jianlin, Shaoling Chen, Zhiguo Liu, Hao Feng, Yaoming Xie, and R. Bruce King. "Bis(methylborabenzene) sandwich compounds of the first row transition metals." Journal of Organometallic Chemistry 763-764 (August 2014): 69–73. http://dx.doi.org/10.1016/j.jorganchem.2014.04.012.

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33

Gehlhoff, W., D. Azamat, A. Hoffmann, N. Dietz, and O. V. Voevodina. "Transition metals in ZnGeP2 and other II–IV–V2 compounds." Physica B: Condensed Matter 376-377 (April 2006): 790–94. http://dx.doi.org/10.1016/j.physb.2005.12.198.

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34

Russo, L., and W. Clegg. "Connectivity variation in coordination compounds of isophthalate and transition metals." Acta Crystallographica Section A Foundations of Crystallography 61, a1 (August 23, 2005): c306. http://dx.doi.org/10.1107/s0108767305086952.

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35

de Oliveira, N. A. "Magnetocaloric effect in transition metals based compounds: a theoretical approach." European Physical Journal B - Condensed Matter and Complex Systems 40, no. 3 (August 2004): 259–64. http://dx.doi.org/10.1140/epjb/e2004-00267-9.

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36

Fedorov, M. I., V. K. Zaitsev, F. Yu Solomkin, and M. V. Vedernikov. "Thermoelectric elements based on compounds of silicon and transition metals." Technical Physics Letters 23, no. 8 (August 1997): 602–3. http://dx.doi.org/10.1134/1.1261766.

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37

Ivanova, V. N. "Fullerene compounds with transition metals MnC60: Preparation, structure, and properties." Journal of Structural Chemistry 41, no. 1 (July 2000): 135–48. http://dx.doi.org/10.1007/bf02684739.

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38

Watson, R. E., G. W. Fernando, M. Weinert, and J. W. Davenport. "First principles calculations: The elemental transition metals and their compounds." Journal of Phase Equilibria 13, no. 3 (June 1992): 244–50. http://dx.doi.org/10.1007/bf02667548.

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39

Hommel, D., H. Hartmann, W. Busse, H. E. Gumlich, and J. Kreissl. "II–VI compounds codoped with transition metals and rare earths." Journal of Luminescence 48-49 (January 1991): 655–60. http://dx.doi.org/10.1016/0022-2313(91)90213-f.

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40

Shuvaev, A. T., B. Yu Helmer, V. L. Kraizman, T. A. Lyubesnova, A. S. Mirmilstein, L. D. Kvacheva, Yu N. Novikov, and M. E. Vol'pin. "Graphite intercalation compounds with 3D-transition metals: Graphite-metal interaction." Physica B: Condensed Matter 158, no. 1-3 (June 1989): 539–42. http://dx.doi.org/10.1016/0921-4526(89)90381-5.

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41

Gor’kov, Lev P. "Local Polaronic Effects in Compounds with Atoms of Transition Metals." Journal of Superconductivity and Novel Magnetism 25, no. 3 (March 11, 2012): 573–79. http://dx.doi.org/10.1007/s10948-012-1448-x.

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42

Rabanal-León, Walter A., Juliana A. Murillo-López, and Ramiro Arratia-Pérez. "Insights into bonding interactions and excitation energies of 3d–4f mixed lanthanide transition metal macrocyclic complexes." Physical Chemistry Chemical Physics 18, no. 48 (2016): 33218–25. http://dx.doi.org/10.1039/c6cp07001a.

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This work provides insights into the metal/macrocyclic (host–guest) interaction and spectroscopic properties of the macrocyclic coordination compounds containing both lanthanide and transition metals inside their framework.
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43

Maloney, Andrew G. P., Peter A. Wood, and Simon Parsons. "Intermolecular interaction energies in transition metal coordination compounds." CrystEngComm 17, no. 48 (2015): 9300–9310. http://dx.doi.org/10.1039/c5ce01522g.

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44

Launay, Maxence, and Richard Dronskowski. "ATheoretical Study on the Existence and Structures of Some Hypothetical First-Row Transition-Metal M(NCN) Compounds." Zeitschrift für Naturforschung B 60, no. 4 (April 1, 2005): 437–48. http://dx.doi.org/10.1515/znb-2005-0415.

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The family of quasi-binary cyanamides/carbodiimides of general formula M(NCN) containing divalent 3d transition metals (M = Mn, Fe, Co, Ni and Cu) has been studied by density-functional means; until now, such light transition-metal compounds have not yet been prepared. Twenty-eight structural models have been considered based on known compounds having NCN2− and other triatomic anionic entities (e. g., thiocyanates). After performing LDA geometry optimizations, the relative energetic orderings are interpreted in terms of geometrical factors such as molar volumes and effective coordination numbers; dense structures with octahedral metal coordinations and highspin electronic configurations are to be expected, especially for the earlier metals (Mn and Fe). Based on GGA total-energy calculations, there is a chance to synthesize these enthalpically unstable compounds, not from the elements but via appropriate exchange reactions employing fairly stable cyanamide/carbodiimide precursors and yielding stable or volatile metal halides which can be removed from the chemical equilibria
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45

Zhao, Yi, Qun Chen, Mingyang He, Zhihui Zhang, Xuejun Feng, Yaoming Xie, Robert Bruce King, and Henry F. Schaefer. "Tris(Butadiene) Compounds versus Butadiene Oligomerization in Second-Row Transition Metal Chemistry: Effects of Increased Ligand Fields." Molecules 26, no. 8 (April 12, 2021): 2220. http://dx.doi.org/10.3390/molecules26082220.

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The geometries, energetics, and preferred spin states of the second-row transition metal tris(butadiene) complexes (C4H6)3M (M = Zr–Pd) and their isomers, including the experimentally known very stable molybdenum derivative (C4H6)3Mo, have been examined by density functional theory. Such low-energy structures are found to have low-spin singlet and doublet spin states in contrast to the corresponding derivatives of the first-row transition metals. The three butadiene ligands in the lowest-energy (C4H6)3M structures of the late second-row transition metals couple to form a C12H18 ligand that binds to the central metal atom as a hexahapto ligand for M = Pd but as an octahapto ligand for M = Rh and Ru. However, the lowest-energy (C4H6)3M structures of the early transition metals have three separate tetrahapto butadiene ligands for M = Zr, Nb, and Mo or two tetrahapto butadiene ligands and one dihapto butadiene ligand for M = Tc. The low energy of the experimentally known singlet (C4H6)3Mo structure contrasts with the very high energy of its experimentally unknown singlet chromium (C4H6)3Cr analog relative to quintet (C12H18)Cr isomers with an open-chain C12H18 ligand.
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46

Wang, Jing, Xuemin Jing, Yu Cao, Guanghua Li, Qisheng Huo, and Yunling Liu. "Structural diversity and magnetic properties of three metal–organic frameworks assembled from a T-shaped linker." CrystEngComm 17, no. 3 (2015): 604–11. http://dx.doi.org/10.1039/c4ce01799d.

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Three helical metal–organic frameworks were solvothermally synthesized by reacting a T-shaped linker, 2,2′-bipyridyl-5,5′-dicarboxylic acid ligand with transition metals, and the magnetic properties of the compounds were studied.
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47

Stavarache, Carmen, Rokura Nishimura, Yasuaki Maeda, and Mircea Vinatoru. "Sonolysis of chlorobenzene in the presence of transition metal salts." Open Chemistry 1, no. 4 (December 1, 2003): 339–55. http://dx.doi.org/10.2478/bf02475221.

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AbstractSonolysis of aqueous solution of chlorobenzene at 200 kHz frequency in the presence of transition metals chlorides was investigated. Through analyzing the nature and distribution of the products detected in the reaction mixture, a new mechanism of sonodegradation is advanced. Depending on the metals used and their behavior during sonolysis, we were able to discriminate between inside and outside cavitation bubble mechanisms. Iron and cobalt chlorides, which could undergo redox reactions in the presence of HO radicals generated ultrasonically, give higher amounts of phenolic compounds compared with palladium chloride that undergoes a reduction to metal. Palladium reduction takes place in bulk solution and therefore all organic reactions that compete for hydrogen must occur also in bulk solution. Accordingly, palladium can be a useful tool in determining the reaction site and the decomposition mechanism of organic compounds under ultrasonic irradiation.
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48

Salzer, A. "Nomenclature of Organometallic Compounds of the Transition Elements (IUPAC Recommendations 1999)." Pure and Applied Chemistry 71, no. 8 (August 30, 1999): 1557–85. http://dx.doi.org/10.1351/pac199971081557.

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Organometallic compounds are defined as containing at least one metal-carbon bond between an organic molecule, ion, or radical and a metal. Organometallic nomenclature therefore usually combines the nomenclature of organic chemisty and that of coordination chemistry. Provisional rules outlining nomenclature for such compounds are found both in Nomenclature of Organic Chemistry, 1979 and in Nomenclature of Inorganic Chemistry, 1990This document describes the nomenclature for organometallic compounds of the transition elements, that is compounds with metal-carbon single bonds, metal-carbon multiple bonds as well as complexes with unsaturated molecules (metal-p-complexes).Organometallic compounds are considered to be produced by addition reactions and so they are named on an addition principle. The name therefore is built around the central metal atom name. Organic ligand names are derived according to the rules of organic chemistry with appropriate endings to indicate the different bonding modes. To designate the points of attachment of ligands in more complicated structures, the h, k, and m-notations are used. The final section deals with the abbreviated nomenclature for metallocenes and their derivatives.ContentsIntroduction Systems of Nomenclature2.1 Binary type nomenclature 2.2 Substitutive nomenlcature 2.3 Coordination nomenclature Coordination Nomenclature3.1 General definitions of coordination chemistry 3.2 Oxidation numbers and net charges 3.3 Formulae and names for coordination compounds Nomenclature for Organometallic Compounds of Transition Metals 4.1 Valence-electron-numbers and the 18-valence-electron-rule 4.2 Ligand names 4.2.1 Ligands coordinating by one metal-carbon single bond 4.2.2 Ligands coordinating by several metal-carbon single bonds 4.2.3 Ligands coordinating by metal-carbon multiple bonds 4.2.4 Complexes with unsaturated molecules or groups 4.3 Metallocene nomenclature
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49

Mhaske, Santosh, and Ranjeet Dhokale. "Transition-Metal-Catalyzed Reactions Involving Arynes." Synthesis 50, no. 01 (November 22, 2017): 1–16. http://dx.doi.org/10.1055/s-0036-1589517.

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The plethora of transformations attainable by the transition-metal-catalyzed reactions of arynes has found immense contemporary interest in the scientific community. This review highlights the scope and importance of transition-metal-catalyzed aryne reactions in the field of synthetic organic chemistry reported to date. It covers transformations achieved by the combination of arynes and various transition metals, which provide a facile access to a biaryl motif, fused polycyclic aromatic compounds, different novel carbocycles, various heterocycles, and complex natural products.1 Introduction2 Insertion of Arynes3 Annulation of Arynes4 Cycloaddition of Arynes5 Multicomponent Reactions of Arynes6 Miscellaneous Reactions of Arynes7 Total Synthesis of Natural Products Using Arynes8 Conclusion
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50

Johnstone, Timothy C., Kogularamanan Suntharalingam, and Stephen J. Lippard. "Third row transition metals for the treatment of cancer." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373, no. 2037 (March 13, 2015): 20140185. http://dx.doi.org/10.1098/rsta.2014.0185.

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Platinum compounds are a mainstay of cancer chemotherapy, with over 50% of patients receiving platinum. But there is a great need for improvement. Major features of the cisplatin mechanism of action involve cancer cell entry, formation mainly of intrastrand cross-links that bend and unwind nuclear DNA, transcription inhibition and induction of cell-death programmes while evading repair. Recently, we discovered that platinum cross-link formation is not essential for activity. Monofunctional Pt compounds such as phenanthriplatin, which make only a single bond to DNA nucleobases, can be far more active and effective against a range of tumour types. Without a cross-link-induced bend, monofunctional complexes can be accommodated in the major groove of DNA. Their biological mechanism of action is similar to that of cisplatin. These discoveries opened the door to a large family of heavy metal-based drug candidates, including those of Os and Re, as will be described.
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