D. Bagchi, S. Chaudhuri, S. Sardar, S. Choudhury, N. Polley, P
... samples. It has to be noted that BQ attached curcumin structure might not be similar to that of metallo curcumin complexes but excited state electron transfer timescale is similar due to proximity between two entities in both the cases. Thus, the shorter timescale in presence of metal ions can be ra ...
... samples. It has to be noted that BQ attached curcumin structure might not be similar to that of metallo curcumin complexes but excited state electron transfer timescale is similar due to proximity between two entities in both the cases. Thus, the shorter timescale in presence of metal ions can be ra ...
Clusters: Structure, Energetics, and Dynamics of Intermediate States
... protonated species, parent ions of the original molecular nature, and a variety of metal ions could be produced and investigated. Mixed clusters were soon studied, and extensive data are now available on the solvation of mixed molecular and protonated complexes, in addition to the aforementioned spe ...
... protonated species, parent ions of the original molecular nature, and a variety of metal ions could be produced and investigated. Mixed clusters were soon studied, and extensive data are now available on the solvation of mixed molecular and protonated complexes, in addition to the aforementioned spe ...
Platinum Complexes of Bicyclopropylidene and Related Ligands
... Palladium-catalysed addition of metal hydrides to MCP. . . . . . . . . . . Palladium-catalysed addition of pronucleophiles to MCP. . . . . . . . . . . Possible mechanisms for the metal-catalysed silaboration of MCP. . . . . . Synthesis of Ni and Pt complexes of MCP . . . . . . . . . . . . . . . . . ...
... Palladium-catalysed addition of metal hydrides to MCP. . . . . . . . . . . Palladium-catalysed addition of pronucleophiles to MCP. . . . . . . . . . . Possible mechanisms for the metal-catalysed silaboration of MCP. . . . . . Synthesis of Ni and Pt complexes of MCP . . . . . . . . . . . . . . . . . ...
Late Transition Metal Amido Complexes: Electronic
... Lappart herby established the synthetic strategies and structural motifs of the amido ligand (NR2-) and furthermore explored the reactivity of amido metal bonds.[2a] During the past decades, this type of ligands have developed an increasing dominant role in ligand design due to their unique and ...
... Lappart herby established the synthetic strategies and structural motifs of the amido ligand (NR2-) and furthermore explored the reactivity of amido metal bonds.[2a] During the past decades, this type of ligands have developed an increasing dominant role in ligand design due to their unique and ...
Discoveries of New Topological STates of Matter Beyond Topological Insulators
... (known as the valence bands) that are separated from a completely empty set of bands (the valence bands) by an energy gap. An insulator is electronically inert because it takes a finite energy to dislodge an electron. Let us take a representative example an atomic insulator, such as a solid argon. A ...
... (known as the valence bands) that are separated from a completely empty set of bands (the valence bands) by an energy gap. An insulator is electronically inert because it takes a finite energy to dislodge an electron. Let us take a representative example an atomic insulator, such as a solid argon. A ...
Discoveries of New Topological States of Matter Beyond Topological
... organize in various ways leading to different states or phases of matter. Finding all possible distinct states that matter can form and understanding the physics behind each of them are fundamentally important goals in physics research. Meanwhile, the discoveries of new phases, such as superconducti ...
... organize in various ways leading to different states or phases of matter. Finding all possible distinct states that matter can form and understanding the physics behind each of them are fundamentally important goals in physics research. Meanwhile, the discoveries of new phases, such as superconducti ...
article
... states stimulated the search for other ligands with similar properties. In this connection Wilkinson and Irvine [2] in 1951 discovered the binary zerovalent nickel trifluorophosphine complex Ni(PF3)4, as a volatile liquid considerably more stable than Ni(CO)4. Subsequent work led to the extensive de ...
... states stimulated the search for other ligands with similar properties. In this connection Wilkinson and Irvine [2] in 1951 discovered the binary zerovalent nickel trifluorophosphine complex Ni(PF3)4, as a volatile liquid considerably more stable than Ni(CO)4. Subsequent work led to the extensive de ...
Copyright 2010 Scott R
... Na(H3BNMe2BH3), in tetrahydrofuran produces the new complex Th(H3BNMe2BH3)4. The thorium center forms bonds with fifteen hydrogen atoms; accordingly, this is the first example of a fifteen-coordinate atom of any kind. As determined by both single crystal X-ray and single crystal neutron diffraction ...
... Na(H3BNMe2BH3), in tetrahydrofuran produces the new complex Th(H3BNMe2BH3)4. The thorium center forms bonds with fifteen hydrogen atoms; accordingly, this is the first example of a fifteen-coordinate atom of any kind. As determined by both single crystal X-ray and single crystal neutron diffraction ...
Reactions of Transition Metal Complexes with Fullerenes (C60, C70
... to the fullerene through some type of bridging arrangement, and (4) the formation of solids in which the fullerene and a metal complex are cocrystallized.21 The last reaction type may involve some degree of charge transfer between the individual components. The survey in Section III reports on the s ...
... to the fullerene through some type of bridging arrangement, and (4) the formation of solids in which the fullerene and a metal complex are cocrystallized.21 The last reaction type may involve some degree of charge transfer between the individual components. The survey in Section III reports on the s ...
Triplet states in organic semiconductors Materials Science and
... For the sake of readability, we do not spell out all the chemical abbreviations for the compounds referred to in the text. A table listing the abbreviations and the chemical names is appended at the end of the article. 2. Basic properties of triplet states in organic semiconductors 2.1. Organic semi ...
... For the sake of readability, we do not spell out all the chemical abbreviations for the compounds referred to in the text. A table listing the abbreviations and the chemical names is appended at the end of the article. 2. Basic properties of triplet states in organic semiconductors 2.1. Organic semi ...
as a PDF
... of covering the descriptive chemistry of silver, gold and the six platinum metals in some detail at a level suitable for advanced undergraduate and postgraduate study. It does not attempt to be a comprehensive treatise on the chemistry of these metals. It attempts to fill a slot between the general ...
... of covering the descriptive chemistry of silver, gold and the six platinum metals in some detail at a level suitable for advanced undergraduate and postgraduate study. It does not attempt to be a comprehensive treatise on the chemistry of these metals. It attempts to fill a slot between the general ...
Higher-Coordinated Molecular Silicon Compounds
... For octahedral compounds a description using a sp3d2 hybridization was frequently discussed. However, due to the relatively high energy of the 3d orbitals of silicon, it is usually accepted that their role is not significant. Thus, two-electron–two-center bonds are not considered as the appropriate ...
... For octahedral compounds a description using a sp3d2 hybridization was frequently discussed. However, due to the relatively high energy of the 3d orbitals of silicon, it is usually accepted that their role is not significant. Thus, two-electron–two-center bonds are not considered as the appropriate ...
A study of complexes Mg(NH3)n and Ag(NH3)n , where n 1–8
... for sequential addition of NH3 to Mg⫹䡠 resulting from direct coordination to the metal are 38.1, 26.6, 21.2, 13.7, 12.1, and 11.3 kcal mol⫺1. The free energies for these same addition reactions are all negative, although for complexes with n ⱖ 4 the values are very small. Attempts at optimising stru ...
... for sequential addition of NH3 to Mg⫹䡠 resulting from direct coordination to the metal are 38.1, 26.6, 21.2, 13.7, 12.1, and 11.3 kcal mol⫺1. The free energies for these same addition reactions are all negative, although for complexes with n ⱖ 4 the values are very small. Attempts at optimising stru ...
Unitat de Química Física Departament de Química Universitat Autònoma de Barcelona
... those that have been synthesized.1 Natural zeolites are traditionally referred using long names such as Chabazite, Faujasite, or Mordenite. They are commonly found with alkali or alkali-earth metals as countercations and they are produced following two different routes:1 one at low temperatures, ass ...
... those that have been synthesized.1 Natural zeolites are traditionally referred using long names such as Chabazite, Faujasite, or Mordenite. They are commonly found with alkali or alkali-earth metals as countercations and they are produced following two different routes:1 one at low temperatures, ass ...
THE RISE OF GRAPHENE A.K. Geim and K.S. Novoselov
... more sophisticated than drawing by a piece of graphite8 or its repeated peeling with adhesive tape7 until the thinnest flakes are found. A similar approach was tried by other groups (earlier35 and independently22,36) but only graphite flakes 20 to 100 layers thick were found. The problem is that gra ...
... more sophisticated than drawing by a piece of graphite8 or its repeated peeling with adhesive tape7 until the thinnest flakes are found. A similar approach was tried by other groups (earlier35 and independently22,36) but only graphite flakes 20 to 100 layers thick were found. The problem is that gra ...
AP Chemistry-midterm review
... ____ 50. What mass of fluoristan, SnF2, would contain the same mass of tin as 306 grams of cassiterite, SnO 2? a. 295 g b. 318 g c. 278 g d. 367 g e. 335 g ____ 51. Heating MgSO4•7H2O at 150 C produces MgSO4•xH2O. If heating 24.4 g of pure MgSO4•7H2O at 150 C were to give 13.7 g of pure MgSO4•xH2O, ...
... ____ 50. What mass of fluoristan, SnF2, would contain the same mass of tin as 306 grams of cassiterite, SnO 2? a. 295 g b. 318 g c. 278 g d. 367 g e. 335 g ____ 51. Heating MgSO4•7H2O at 150 C produces MgSO4•xH2O. If heating 24.4 g of pure MgSO4•7H2O at 150 C were to give 13.7 g of pure MgSO4•xH2O, ...
Computational Redox Potential Predictions Applications to Inorganic
... When the SHE is used as a reference electrode in cyclic voltammetry experiment, its value is defined to be zero at pH = 0 and atmospheric pressure of H2 = 1 bar. Similar to the SHE, there are other reference electrodes such as the saturated calomel electrode (SCE) and Ag+/AgCl electrode that are in ...
... When the SHE is used as a reference electrode in cyclic voltammetry experiment, its value is defined to be zero at pH = 0 and atmospheric pressure of H2 = 1 bar. Similar to the SHE, there are other reference electrodes such as the saturated calomel electrode (SCE) and Ag+/AgCl electrode that are in ...
Theoretical studies of nitrilotriacetic acid and nitrilotripropionic acid geometries for
... a reasonable time. This has brought about an era where calculations that once took months to complete can now be done in a few days, or better yet in a few hours (depending on the number of processors and amount of Random Access Memory (RAM) available). Computational chemistry, however, does not onl ...
... a reasonable time. This has brought about an era where calculations that once took months to complete can now be done in a few days, or better yet in a few hours (depending on the number of processors and amount of Random Access Memory (RAM) available). Computational chemistry, however, does not onl ...
Polyhedral Oligomeric Silsesquioxane
... shorter distances of 1.43 and 1.89 Å, probably due to the slightly distorted conformation of the bulk and partially sulfurligand complex of [Pd3(μ-O2CMe)3(S-POSS)3] (Scheme 1).77 After the thiol-mediated reduction, this steric effect on the structural conformation is diminished by ring-opening of th ...
... shorter distances of 1.43 and 1.89 Å, probably due to the slightly distorted conformation of the bulk and partially sulfurligand complex of [Pd3(μ-O2CMe)3(S-POSS)3] (Scheme 1).77 After the thiol-mediated reduction, this steric effect on the structural conformation is diminished by ring-opening of th ...
Beyond Conventional N-Heterocyclic Carbenes
... stabilized by two adjacent heteroatoms, as in Arduengo-type carbenes, and also not necessarily with heteroatoms placed in a position R to the carbene carbon was revived by a serendipitous discovery of C4 bonding in imidazolylidenes.6 The large class of heterocyclic carbenes that can be grouped toget ...
... stabilized by two adjacent heteroatoms, as in Arduengo-type carbenes, and also not necessarily with heteroatoms placed in a position R to the carbene carbon was revived by a serendipitous discovery of C4 bonding in imidazolylidenes.6 The large class of heterocyclic carbenes that can be grouped toget ...
Fragmentation and charge transfer in gas
... The development of electrospray has enabled generation of gas-phase multiply charged metal ion complexes with various solvent molecules. These species exhibit rich fragmentation chemistry, involving competition among neutral ligand loss, ligand cleavage, and dissociative electron and proton transfer ...
... The development of electrospray has enabled generation of gas-phase multiply charged metal ion complexes with various solvent molecules. These species exhibit rich fragmentation chemistry, involving competition among neutral ligand loss, ligand cleavage, and dissociative electron and proton transfer ...
inorganic chemistry and spectroscopy ( a systematic approach)
... The first transition series is 3d-series having ten elements from 21Sc to 30Zn. The second transition series is 4d-series having ten elements from 39Y to 48Cd. The third transition series is 5d-series having ten elements from 57La, 72Hf to 80Hg. Cu+ is diamagnetic while Co+2 is paramagnetic. In the ...
... The first transition series is 3d-series having ten elements from 21Sc to 30Zn. The second transition series is 4d-series having ten elements from 39Y to 48Cd. The third transition series is 5d-series having ten elements from 57La, 72Hf to 80Hg. Cu+ is diamagnetic while Co+2 is paramagnetic. In the ...
coordination of some monodentate and hybrid multident ate
... feature of this work, the metal-phosphine complexes. It describes common routes for the preparation of transition-metal phosphine complexes, some of which are implicated in this work, followed by an analysis of the metal-phosphine bonding and the different factors contributing to its stability. In a ...
... feature of this work, the metal-phosphine complexes. It describes common routes for the preparation of transition-metal phosphine complexes, some of which are implicated in this work, followed by an analysis of the metal-phosphine bonding and the different factors contributing to its stability. In a ...
Jahn–Teller effect
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The Jahn–Teller effect, sometimes also known as Jahn–Teller distortion, describes the geometrical distortion of molecules and ions that is associated with certain electron configurations. This electronic effect is named after Hermann Arthur Jahn and Edward Teller, who proved, using group theory, that orbital nonlinear spatially degenerate molecules cannot be stable. The Jahn–Teller theorem essentially states that any nonlinear molecule with a spatially degenerate electronic ground state will undergo a geometrical distortion that removes that degeneracy, because the distortion lowers the overall energy of the species. For a description of another type of geometrical distortion that occurs in crystals with substitutional impurities see article off-center ions.