Pure Appl. Chem., Vol. 85, No. 8, pp. 1715–1724, 2013.
... among research groups, causing additional confusion and unnecessary misunderstandings. The IUPAC task group Coordination Polymers and Metal Organic Frameworks: Terminology and Nomenclature Guidelines has since 2009 documented, analyzed, and evaluated existing practices in a continuous dialogue with ...
... among research groups, causing additional confusion and unnecessary misunderstandings. The IUPAC task group Coordination Polymers and Metal Organic Frameworks: Terminology and Nomenclature Guidelines has since 2009 documented, analyzed, and evaluated existing practices in a continuous dialogue with ...
Phosphorescent Organic Light-Emitting Devices: Working Principle and Iridium Based Emitter Materials
... 2.2. Single and multilayer OLEDs Depending on device architecture, electroluminescent devices can be divided into single layer and multilayer OLEDs. Single layer OLEDs typically consist of a metal cathode with a low work function (e.g. Ca, Al, Ba), an organic emissive layer and a transparent anode [ ...
... 2.2. Single and multilayer OLEDs Depending on device architecture, electroluminescent devices can be divided into single layer and multilayer OLEDs. Single layer OLEDs typically consist of a metal cathode with a low work function (e.g. Ca, Al, Ba), an organic emissive layer and a transparent anode [ ...
Teaching with SCIGRESS - Photochemical Dynamics Group
... One of the important achievements in chemistry is our ability to predict the bulk properties of a compound based on what we know of the microscopic structure of molecules and ions. Molecular geometry provides much of the information upon which these predictions are made. From lectures you have learn ...
... One of the important achievements in chemistry is our ability to predict the bulk properties of a compound based on what we know of the microscopic structure of molecules and ions. Molecular geometry provides much of the information upon which these predictions are made. From lectures you have learn ...
THE DETERMINATION OF TRANSITION METAL IONS IN
... ions in anaerobic adhesive chemistry, and it was therefore decided to investigate an alternative chelating agent. This alternative ligand was 8 -hydroxyquinoline, and using this it was possible to resolve Cu(II) and Fe(lII) as their oxinate complexes using reverse phase high performance liquid chrom ...
... ions in anaerobic adhesive chemistry, and it was therefore decided to investigate an alternative chelating agent. This alternative ligand was 8 -hydroxyquinoline, and using this it was possible to resolve Cu(II) and Fe(lII) as their oxinate complexes using reverse phase high performance liquid chrom ...
Infrared spectroscopic studies of the different solid
... The (CO3)2- ion is planar and therefore, it belongs to the D3h symmetry. It is expected to display four modes of vibrations, A`1 + A``2 + 2E` (E` is a doubly degenerate motion). The vibration A`1 is only Raman active while the other 2, 3 and 4 are infrared active. The stretching vibrations of the ...
... The (CO3)2- ion is planar and therefore, it belongs to the D3h symmetry. It is expected to display four modes of vibrations, A`1 + A``2 + 2E` (E` is a doubly degenerate motion). The vibration A`1 is only Raman active while the other 2, 3 and 4 are infrared active. The stretching vibrations of the ...
Spectroscopic Characterization of the Surface of Iron Oxide
... synthesis. The ligand was removed from the nanocrystal surface by washing the nanocrystal hexane dispersion with an equal volume of EtOH several times. The surfactant was subsequently characterized by 1H NMR and FTIR, which also proved that the removed ligand was no longer oleic acid. The 1H NMR of ...
... synthesis. The ligand was removed from the nanocrystal surface by washing the nanocrystal hexane dispersion with an equal volume of EtOH several times. The surfactant was subsequently characterized by 1H NMR and FTIR, which also proved that the removed ligand was no longer oleic acid. The 1H NMR of ...
A Chromium(III)−Superoxo Complex in Oxygen Atom Transfer
... Thus, the present results report a chemical model of CDO and are discussed in light of the role of an iron(III)−superoxo intermediate in the oxidation of cysteine in CDO (see Schemes 1 and 2). The Cr(III)−superoxo complex, [CrIII(O2)(TMC)(Cl)]+ (1), was generated by bubbling O2 through a solution of ...
... Thus, the present results report a chemical model of CDO and are discussed in light of the role of an iron(III)−superoxo intermediate in the oxidation of cysteine in CDO (see Schemes 1 and 2). The Cr(III)−superoxo complex, [CrIII(O2)(TMC)(Cl)]+ (1), was generated by bubbling O2 through a solution of ...
Chemistry of the d
... e.g.: i) all Co(III) Complexes are diamagnetic; except [CoF6]3-, [CoF3(H2O)3] ii) Cr(III) in Oh: 3 unpaired e−; Cr(II) in Oh: predicted: 2e−, exp.: 4 unpaired e− 2) Ni(II) planar vs. octahedral is supposed to introduce change from covalent to ionic e.g.: [Ni(en)2]2+ 2NH3 Æ [Ni(NH3)2(en)2] 3) Two Ato ...
... e.g.: i) all Co(III) Complexes are diamagnetic; except [CoF6]3-, [CoF3(H2O)3] ii) Cr(III) in Oh: 3 unpaired e−; Cr(II) in Oh: predicted: 2e−, exp.: 4 unpaired e− 2) Ni(II) planar vs. octahedral is supposed to introduce change from covalent to ionic e.g.: [Ni(en)2]2+ 2NH3 Æ [Ni(NH3)2(en)2] 3) Two Ato ...
IUPAC Provisional Recommendations
... that can be applied to inorganic compounds, briefly described here as an introduction to the later, more detailed, chapters. Because each system can provide a valid name for a compound, a flowchart is presented which should help identify which is the most appropriate for the type of compound of inte ...
... that can be applied to inorganic compounds, briefly described here as an introduction to the later, more detailed, chapters. Because each system can provide a valid name for a compound, a flowchart is presented which should help identify which is the most appropriate for the type of compound of inte ...
Molecular Encapsulation - Colin Nuckolls
... emergent properties through supramolecular chemistry. Stephen Craig received his undergraduate degree in chemistry at Duke University, Durham (1991) and obtained an M.Phil. degree from Cambridge (1992) and a Ph.D. from Stanford University (1997). After two years as a Research Chemist in DuPont Centr ...
... emergent properties through supramolecular chemistry. Stephen Craig received his undergraduate degree in chemistry at Duke University, Durham (1991) and obtained an M.Phil. degree from Cambridge (1992) and a Ph.D. from Stanford University (1997). After two years as a Research Chemist in DuPont Centr ...
Exam 3 Review Problems
... 34. Identify the element with the ground state electron configuration [Xe]4f145d76s2. ...
... 34. Identify the element with the ground state electron configuration [Xe]4f145d76s2. ...
Induced Aromaticity and Electron-Count Rules for Bipyramidal and
... borane fragments results in metalloboranes [6, 14, 15], which are isostructural and isoelectronic to the hydrocarbon analogues. Thus, metal-containing groups stabilize not only the aromatic forms of hydrocarbons CnHn, but also the aromatic nido-form of isoelectronic boranes BnH2n, which does not exi ...
... borane fragments results in metalloboranes [6, 14, 15], which are isostructural and isoelectronic to the hydrocarbon analogues. Thus, metal-containing groups stabilize not only the aromatic forms of hydrocarbons CnHn, but also the aromatic nido-form of isoelectronic boranes BnH2n, which does not exi ...
Spontaneous Enrichment of Organic Molecules from Aqueous and
... phase and choose to construct such a synthetic system on dimethyl sulfoxide based gel materials. As noncrystalline materials, gels, formed by threedimensional, elastic polymeric networks whose interstitial spaces are filled with a fluid, not only can undergo large deformation by external stimuli2,3 ...
... phase and choose to construct such a synthetic system on dimethyl sulfoxide based gel materials. As noncrystalline materials, gels, formed by threedimensional, elastic polymeric networks whose interstitial spaces are filled with a fluid, not only can undergo large deformation by external stimuli2,3 ...
Construction of Porous Solids from Hydrogen
... framework. This yields an open-framework having voids that are decorated by coordinately unsaturated metal centers, which consequently are capable of serving as binding sites to other inclusions. In such an open framework, the selective inclusion of incoming molecular guests is dependent not only on ...
... framework. This yields an open-framework having voids that are decorated by coordinately unsaturated metal centers, which consequently are capable of serving as binding sites to other inclusions. In such an open framework, the selective inclusion of incoming molecular guests is dependent not only on ...
1 Electrophilic RhI catalysts for arene H/D exchange in acidic media
... activation occurs by an electrophilic substitution process (regardless of the exact mechanism, which could be "classic" electrophilic substitution, see Scheme 1, or concerted-metalation deprotonation) [81] and is enhanced by less electron-rich Rh catalysts; 3) the C–H "activation" occurs by an elect ...
... activation occurs by an electrophilic substitution process (regardless of the exact mechanism, which could be "classic" electrophilic substitution, see Scheme 1, or concerted-metalation deprotonation) [81] and is enhanced by less electron-rich Rh catalysts; 3) the C–H "activation" occurs by an elect ...
Bis-Triazinyl-Pyridines for selective extraction of americium(III
... 2,6-bis(5,6-dialkyl-[1,2,4]-triazin-3-yl)pyridines (See Figure 1) were the first N-donor ligands to perform the difficult separation of trivalent actinides from feed solutions of rather high acidities (e.g., extracting americium(III) from 1M nitric acid into 0.04M n-Pr-BTP in kerosene/octanol, the o ...
... 2,6-bis(5,6-dialkyl-[1,2,4]-triazin-3-yl)pyridines (See Figure 1) were the first N-donor ligands to perform the difficult separation of trivalent actinides from feed solutions of rather high acidities (e.g., extracting americium(III) from 1M nitric acid into 0.04M n-Pr-BTP in kerosene/octanol, the o ...
Received 02-11-2001
... Results and discussion Table 1 summarizes the carbon, hydrogen and nitrogen elemental analysis of the isolated complexes. The results obtained indicate that all of the isolated complexes are formed from the reaction of the metal salt with drug in 1:2 molar ratio. All of the complexes reported herein ...
... Results and discussion Table 1 summarizes the carbon, hydrogen and nitrogen elemental analysis of the isolated complexes. The results obtained indicate that all of the isolated complexes are formed from the reaction of the metal salt with drug in 1:2 molar ratio. All of the complexes reported herein ...
Complexometric Reactions and Titrations
... 1. Digestion of the nitrogen containing compound and converting the nitrogen to ammonium hydrogen sulfate. This process is accomplished by decomposing the nitrogen containing compound with sulfuric acid. 2. The solution in step 1 is made alkaline by addition of concentrated NaOH which coverts ammon ...
... 1. Digestion of the nitrogen containing compound and converting the nitrogen to ammonium hydrogen sulfate. This process is accomplished by decomposing the nitrogen containing compound with sulfuric acid. 2. The solution in step 1 is made alkaline by addition of concentrated NaOH which coverts ammon ...
Electronic Structure of Cobalt Nanocrystals Suspended in Liquid
... the chemicals involved in the synthesis of Co nanocrystals from dicobalt carbonyl (Co2(CO)8). It also illustrates a charge transfer from Co nanocrystals to ligand molecules. ...
... the chemicals involved in the synthesis of Co nanocrystals from dicobalt carbonyl (Co2(CO)8). It also illustrates a charge transfer from Co nanocrystals to ligand molecules. ...
(PCP)Ir(O2)_BW_9-25.dot - Werner Kaminsky
... observed by 1H NMR spectroscopy, and no phenol was seen by GC [GC experiment@]. Further work is needed to better define the basic pathways for reactions of O2 with organometallic compounds. In summary, a number of iridium pincer hydride compounds (tBuPCP)Ir(H)(X) react with O2 to give IrIII and IrV ...
... observed by 1H NMR spectroscopy, and no phenol was seen by GC [GC experiment@]. Further work is needed to better define the basic pathways for reactions of O2 with organometallic compounds. In summary, a number of iridium pincer hydride compounds (tBuPCP)Ir(H)(X) react with O2 to give IrIII and IrV ...
EDTA - MOTM - The EndoExperience
... structure of Cr+3 with EDTA shown below. What is different for the Cr-EDTA complex compared to the Fe-EDTA complex? ...
... structure of Cr+3 with EDTA shown below. What is different for the Cr-EDTA complex compared to the Fe-EDTA complex? ...
transition metal complexes possessing tunable and switchable
... (R = Me, Ph, 4-AcPh) (see (iii) above) were used to synthesize four new complex salts c i s [RuII (NH 3 ) 4 (R2 Qpy2+)][PF6] 4 (R = Me 28, Ph 29, 4-AcPh 30, 2-Pym 31). The electronic absorption spectra of 17–31 display intense, visible MLCT bands, the energies of which decrease in the order R = Me > ...
... (R = Me, Ph, 4-AcPh) (see (iii) above) were used to synthesize four new complex salts c i s [RuII (NH 3 ) 4 (R2 Qpy2+)][PF6] 4 (R = Me 28, Ph 29, 4-AcPh 30, 2-Pym 31). The electronic absorption spectra of 17–31 display intense, visible MLCT bands, the energies of which decrease in the order R = Me > ...
HAT(CN)6: a new building block for molecule
... the possibility of the co-existence of properties, or even synergy between them [4,5]. In particular, magnetism has been one of the ®elds that has undergone signi®cant development, with molecule-based magnetic materials that mimic and even improve on the properties of classic inorganic magnets (e.g. ...
... the possibility of the co-existence of properties, or even synergy between them [4,5]. In particular, magnetism has been one of the ®elds that has undergone signi®cant development, with molecule-based magnetic materials that mimic and even improve on the properties of classic inorganic magnets (e.g. ...
4 Investigation of substituent effect on
... complexes [Cr(CO)5{C(X)R}] depends mainly on the electronic characteristics of the carbene substituents X and R, which seem to have remarkable control on the electrophilicity of the complex.30 Specifically, it has been proposed that the -bond character of a metal carbene can be better represented by ...
... complexes [Cr(CO)5{C(X)R}] depends mainly on the electronic characteristics of the carbene substituents X and R, which seem to have remarkable control on the electrophilicity of the complex.30 Specifically, it has been proposed that the -bond character of a metal carbene can be better represented by ...
Oxidation Chemistry of Metal(II) Salen-Type Complexes
... course of the studies, a large number of novel complexes have been synthesized and well characterized [2-18], and especially high valent metal complexes formed as a result of redox reactions have become important in catalytic and biological systems. In general high valent metal complexes have been m ...
... course of the studies, a large number of novel complexes have been synthesized and well characterized [2-18], and especially high valent metal complexes formed as a result of redox reactions have become important in catalytic and biological systems. In general high valent metal complexes have been m ...
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.