Long-Living Light-Emitting Electrochemical Cells - Control
... the time the maximum is reached, indicative of the fact that the device is controlled by the injection limitation. At a bias of 3 V, a maximum brightness of 290 cd m2 is obtained with a current efficiency of 9.7 cd A1. The maximum power efficiency and external quantum efficiency for this electrolu ...
... the time the maximum is reached, indicative of the fact that the device is controlled by the injection limitation. At a bias of 3 V, a maximum brightness of 290 cd m2 is obtained with a current efficiency of 9.7 cd A1. The maximum power efficiency and external quantum efficiency for this electrolu ...
Density functional theory study of the oxoperoxo
... in the study of a related system.17 We compare in Table 1 the theoretical chemical shifts with the experimental solution shifts available from our previous NMR study.15 The comparison of the gas phase SBKJC/B3LYP calculated structure of G-2anti with its solid state structure has not been attempted b ...
... in the study of a related system.17 We compare in Table 1 the theoretical chemical shifts with the experimental solution shifts available from our previous NMR study.15 The comparison of the gas phase SBKJC/B3LYP calculated structure of G-2anti with its solid state structure has not been attempted b ...
complexometric titration -
... B. Back-titration. Many metals cannot, for various reasons, be titrated directly; thus they may precipitate from the solution in the pH range necessary for the titration, or they may form inert complexes, or a suitable metal indicator is not available. In such cases an excess of standard EDTA soluti ...
... B. Back-titration. Many metals cannot, for various reasons, be titrated directly; thus they may precipitate from the solution in the pH range necessary for the titration, or they may form inert complexes, or a suitable metal indicator is not available. In such cases an excess of standard EDTA soluti ...
Synthesis, Characterisation and DFT Analysis of {Ru(NO)2}8
... nitroprusside (SNP) as an example for the PLI-effect................................................................................................................12 Fig. 1.13: Some examples for mononitrosyl complexes. ................................................................................ ...
... nitroprusside (SNP) as an example for the PLI-effect................................................................................................................12 Fig. 1.13: Some examples for mononitrosyl complexes. ................................................................................ ...
A Chapter 4 Organometallics
... [Ce(h8-Cot)2] is known for a long time. Recent calculations tend to prove that it should however be formulated as [Ce3+(Cot2)3-]. It can be reduced by potassium: [Ce(h8-Cot)2] + K K[Ce(h8-Cot)2] Other Ln compounds are obtained as follows: LnCl3 + 2 K2Cot K[Ln(h8-Cot)2] + 3 KCl These compound ...
... [Ce(h8-Cot)2] is known for a long time. Recent calculations tend to prove that it should however be formulated as [Ce3+(Cot2)3-]. It can be reduced by potassium: [Ce(h8-Cot)2] + K K[Ce(h8-Cot)2] Other Ln compounds are obtained as follows: LnCl3 + 2 K2Cot K[Ln(h8-Cot)2] + 3 KCl These compound ...
Robust thallium(III) complexes with inorganic and organic
... Tl(III) itself is a strong oxidant. Tl(III)–oxide is also known to oxidize organic molecules even in cases where Tl(H2O)63+ does not.22 Both these effects prevent the formation or study of many such complexes. Conversely, the multidentate ligands can stabilize the cation against both hydrolysis and ...
... Tl(III) itself is a strong oxidant. Tl(III)–oxide is also known to oxidize organic molecules even in cases where Tl(H2O)63+ does not.22 Both these effects prevent the formation or study of many such complexes. Conversely, the multidentate ligands can stabilize the cation against both hydrolysis and ...
ON THE ROAD TO CARBENE AND CARBYNE COMPLEXES
... However, we very soon found that these complexes are not very stable. They tend to cleave the carbene ligand with a simultaneous hydrogen displacement/shift. We then get aldehydes - as also independently found by Japanese researchers (13). Only recently we have managed to prepare these hydroxy carbe ...
... However, we very soon found that these complexes are not very stable. They tend to cleave the carbene ligand with a simultaneous hydrogen displacement/shift. We then get aldehydes - as also independently found by Japanese researchers (13). Only recently we have managed to prepare these hydroxy carbe ...
view - The Long Group - University of California, Berkeley
... Abstract: Face-capped octahedral clusters of the type [Re6Q8(CN)6]4- (Q ) S, Se) are used to space apart partially hydrated Co2+ ions in extended solid frameworks, creating porous materials that display dramatic color changes upon exposure to certain organic solvents. The clusters react with cobalto ...
... Abstract: Face-capped octahedral clusters of the type [Re6Q8(CN)6]4- (Q ) S, Se) are used to space apart partially hydrated Co2+ ions in extended solid frameworks, creating porous materials that display dramatic color changes upon exposure to certain organic solvents. The clusters react with cobalto ...
Aron Janine 1986
... in the protein-free coenzyme at room temperature. Comparison with published data on the B -isomer^ses shows that the Co-C bond in the coenzyme is lat^jlisea by ^ 10' when bound by the apoenzymo and by a further ^ 10 in the p r e s e n c e of substrate to achieve the overall labilisation of >,10 (i.e ...
... in the protein-free coenzyme at room temperature. Comparison with published data on the B -isomer^ses shows that the Co-C bond in the coenzyme is lat^jlisea by ^ 10' when bound by the apoenzymo and by a further ^ 10 in the p r e s e n c e of substrate to achieve the overall labilisation of >,10 (i.e ...
GOLD Configuration File User Guide
... overrule_metal_coordination ............................................................................67 ...
... overrule_metal_coordination ............................................................................67 ...
2 - Quantum Chemistry Group
... • Optical spectrum of KZnF3: Mn2+ and MnF2 are very similar • The same situation holds comparing Al2O3: Cr3+ ( ruby) with Cr2O3 • Ferroelectricity in BaTiO3 involves an off centre motion! • Perovskites like KMF3 (M:Mg,Zn,Ni) are cubic but KMnF3 is ...
... • Optical spectrum of KZnF3: Mn2+ and MnF2 are very similar • The same situation holds comparing Al2O3: Cr3+ ( ruby) with Cr2O3 • Ferroelectricity in BaTiO3 involves an off centre motion! • Perovskites like KMF3 (M:Mg,Zn,Ni) are cubic but KMnF3 is ...
NUCL 1 Early life of Albert Ghiorso: Preparation for future role as
... Joanna S. Fowler, [email protected]. Medical, Brookhaven National Laboratory, Upton, NY 11973, United States In vivo molecular imaging using organic compounds labeled with the short lived positron emitters, carbon-11 (t1/2: 20.4 min), fluorine-18 (t1/2: 110 min) and nitrogen-13 (t1/2: 10 min) and posit ...
... Joanna S. Fowler, [email protected]. Medical, Brookhaven National Laboratory, Upton, NY 11973, United States In vivo molecular imaging using organic compounds labeled with the short lived positron emitters, carbon-11 (t1/2: 20.4 min), fluorine-18 (t1/2: 110 min) and nitrogen-13 (t1/2: 10 min) and posit ...
The synthesis and characterization of some alkyl sulfide complexes
... halide ions have been the most extensively studied, while reactions with other ligands have been largely neglected. Fairbrother and coworkers (5-7) as well as Keenan and Fowles (8) have recently shown that niobium pentahalides (class "a" acids) will react with alkyl sulfides (class "b" bases) to for ...
... halide ions have been the most extensively studied, while reactions with other ligands have been largely neglected. Fairbrother and coworkers (5-7) as well as Keenan and Fowles (8) have recently shown that niobium pentahalides (class "a" acids) will react with alkyl sulfides (class "b" bases) to for ...
Molecular Orbitals
... ligands are determined, and then “matched” with appropriate atomic orbitals on the central metal. Both σ and π bonding between the metal and ligands can be considered. ...
... ligands are determined, and then “matched” with appropriate atomic orbitals on the central metal. Both σ and π bonding between the metal and ligands can be considered. ...
Dinuclear Nickel(II) and Palladium(II) Complexes in Combination
... Diffraction data were collected by the ω -scan method with Mo-Kα radiation (λ = 0.71073 Å) and the use of a graphite monochromator on a Bruker Smart CCD. Data collection and cell refinement with SMART [71], data reduction with SAINT [71]. An experimental absorption correction was performed with SAD ...
... Diffraction data were collected by the ω -scan method with Mo-Kα radiation (λ = 0.71073 Å) and the use of a graphite monochromator on a Bruker Smart CCD. Data collection and cell refinement with SMART [71], data reduction with SAINT [71]. An experimental absorption correction was performed with SAD ...
Excited States of Pt(PF3)4 and Their Role in Focused Electron Beam
... factor of 2. The addition of zero point energy slightly lowers the BDE; it is a correction that favors dissociation. Relevance of the included dispersion for the calculation of BDE with the B3LYP functional is important for the analogue complex of Ni(0). BDE of Ni(PF3)4, calculated at the SR-B3LYP-D ...
... factor of 2. The addition of zero point energy slightly lowers the BDE; it is a correction that favors dissociation. Relevance of the included dispersion for the calculation of BDE with the B3LYP functional is important for the analogue complex of Ni(0). BDE of Ni(PF3)4, calculated at the SR-B3LYP-D ...
296
... complexation with hydroxide ligands. Uranyl hydroxide chemistry has gained attention in experimental and theoretical communities due to its expected presence in uranium waste solutions. Much of the presented work in this area has focused on uranyl tetrahydroxide, which is the predominant mononuclear ...
... complexation with hydroxide ligands. Uranyl hydroxide chemistry has gained attention in experimental and theoretical communities due to its expected presence in uranium waste solutions. Much of the presented work in this area has focused on uranyl tetrahydroxide, which is the predominant mononuclear ...
Taking advantage of luminescent lanthanide ions
... smaller this gap, the easier is its closing by non-radiative deactivation processes, for instance through vibrations of bound ligands, particularly high energy vibrations such as O–H. Fig. 1 displays partial energy diagrams for the lanthanide aquo ions,15–20 while the main luminescent transitions ar ...
... smaller this gap, the easier is its closing by non-radiative deactivation processes, for instance through vibrations of bound ligands, particularly high energy vibrations such as O–H. Fig. 1 displays partial energy diagrams for the lanthanide aquo ions,15–20 while the main luminescent transitions ar ...
Bis-Silylated Lithium Aryl Amidinates: Synthesis, Characterization
... from the reaction of lithium amides with nitriles or organolithium compounds with carbodiimides, are useful synthons in organic and organometallic chemistry.1 As lithium compounds they also benefit from the merits of the lithium in comparison to other heavier alkali metals, namely its high charge de ...
... from the reaction of lithium amides with nitriles or organolithium compounds with carbodiimides, are useful synthons in organic and organometallic chemistry.1 As lithium compounds they also benefit from the merits of the lithium in comparison to other heavier alkali metals, namely its high charge de ...
PDF (Chapter7)
... (phosphino)borate ligand degradation have been observed in iridium, rhodium, cobalt, platinum, and nickel chemistry.14 In all of these cases, a boron-carbon bond is also cleaved. Previous examples, however, have all shown the boron-methylene link to be the preferential site of reaction. The present ...
... (phosphino)borate ligand degradation have been observed in iridium, rhodium, cobalt, platinum, and nickel chemistry.14 In all of these cases, a boron-carbon bond is also cleaved. Previous examples, however, have all shown the boron-methylene link to be the preferential site of reaction. The present ...
Design and Synthesis of a Thermally Stable Organic Electride
... Crystal Structures. The crystal structures of TriPip222 (3), Na+‚3‚ClO4-, Na+‚3‚AQS-, Na+‚3‚Na-, and Na+‚3‚e- were all determined. The crystal structure data for free 3 and the electride and sodide are presented in Table 1, and the CIF files for all of the structures are given in the Supporting Info ...
... Crystal Structures. The crystal structures of TriPip222 (3), Na+‚3‚ClO4-, Na+‚3‚AQS-, Na+‚3‚Na-, and Na+‚3‚e- were all determined. The crystal structure data for free 3 and the electride and sodide are presented in Table 1, and the CIF files for all of the structures are given in the Supporting Info ...
Molecular Structures of M2(CO)9 and M3(CO)12
... consequence of a relatively large decrease of the M-Cbr-M bond angles. This is an indication that in the latter systems the bent M-M interaction is more direct and strongly correlated with the metal-CO bridge bonding. Alternative methods to calculate complex molecular structures are based on the den ...
... consequence of a relatively large decrease of the M-Cbr-M bond angles. This is an indication that in the latter systems the bent M-M interaction is more direct and strongly correlated with the metal-CO bridge bonding. Alternative methods to calculate complex molecular structures are based on the den ...
Dft Study Of Geometry And Energetics Of Transition Metal
... the dissociation of C2 molecule. We find that high fraction of HF exchange is essential to reproduce the results of EKS treatment with exact exchange-correlation functional. We analyze the geometry and energetics of small nickel clusters (Ni2-Ni5) for several lowest energy isomers. We also study all ...
... the dissociation of C2 molecule. We find that high fraction of HF exchange is essential to reproduce the results of EKS treatment with exact exchange-correlation functional. We analyze the geometry and energetics of small nickel clusters (Ni2-Ni5) for several lowest energy isomers. We also study all ...
Ligand
In coordination chemistry, a ligand (/lɪɡənd/) is an ion or molecule (functional group) that binds to a central metal atom to form a coordination complex. The bonding between metal and ligand generally involves formal donation of one or more of the ligand's electron pairs. The nature of metal-ligand bonding can range from covalent to ionic. Furthermore, the metal-ligand bond order can range from one to three. Ligands are viewed as Lewis bases, although rare cases are known to involve Lewis acidic ""ligand.""Metals and metalloids are bound to ligands in virtually all circumstances, although gaseous ""naked"" metal ions can be generated in high vacuum. Ligands in a complex dictate the reactivity of the central atom, including ligand substitution rates, the reactivity of the ligands themselves, and redox. Ligand selection is a critical consideration in many practical areas, including bioinorganic and medicinal chemistry, homogeneous catalysis, and environmental chemistry.Ligands are classified in many ways like : their charge, their size (bulk), the identity of the coordinating atom(s), and the number of electrons donated to the metal (denticity or hapticity). The size of a ligand is indicated by its cone angle.