Synthesis of chiral furanoside diphosphinite and thioether-phosphinite compounds derived from
... steps. The solution structures of the trigonal bipyramidal hydrodorhodium complexes with bidentate phosphorus ligand (P-P) [HRh(P-P)(CO)2], which are the resting states in the hydroformylation reaction, have been analyzed in detail.xi These complexes are generally assumed to have a trigonal bipyrami ...
... steps. The solution structures of the trigonal bipyramidal hydrodorhodium complexes with bidentate phosphorus ligand (P-P) [HRh(P-P)(CO)2], which are the resting states in the hydroformylation reaction, have been analyzed in detail.xi These complexes are generally assumed to have a trigonal bipyrami ...
Coordination Chemistry and Ligand Exchange reactions in the
... According to Wener, in co-ordination compounds, the central metal atoms exhibit primary and secondary valencies. 1. The primary valency is ionizable. Secondary valency is not ionizable. - The primary valency corresponds to the oxidation state - The secondary valency corresponds to the coordination n ...
... According to Wener, in co-ordination compounds, the central metal atoms exhibit primary and secondary valencies. 1. The primary valency is ionizable. Secondary valency is not ionizable. - The primary valency corresponds to the oxidation state - The secondary valency corresponds to the coordination n ...
General Introduction.
... C: Dianionic ligands (Figure 4): When realizing that the group 3 (and lanthanides) metallocenes and the cationic group 4 metal complexes with a non-coordinating anion are isolobal, one could state as a general rule that a catalytically active group 4 complex requires in total a tri-anionic ligand sy ...
... C: Dianionic ligands (Figure 4): When realizing that the group 3 (and lanthanides) metallocenes and the cationic group 4 metal complexes with a non-coordinating anion are isolobal, one could state as a general rule that a catalytically active group 4 complex requires in total a tri-anionic ligand sy ...
The coordination chemistry of pyridyl oximes
... The coordination chemistry of pyridyl oximes is reviewed. Simple pyridyl oximes have the general formula (py)C(R)NOH, where py is a pyridyl group (2-, 3- or 4-) attached to the oxime carbon atom and R can be a donor or a non-donor group. There are also ligands containing more pyridyl and/or oxime gr ...
... The coordination chemistry of pyridyl oximes is reviewed. Simple pyridyl oximes have the general formula (py)C(R)NOH, where py is a pyridyl group (2-, 3- or 4-) attached to the oxime carbon atom and R can be a donor or a non-donor group. There are also ligands containing more pyridyl and/or oxime gr ...
Multifunctional N,O-type Carborane-Based Materials: from Molecular Complexes to Three Dimensional Metal-Organic Frameworks
... complexes and the resulting data suggests palladium (II) is formed instead of palladium (0), as previously suggested in the literature. Since these types of complexes are known to be used for catalytic reactions, the initial catalytic studies have been carried out for the Suzuki coupling reaction. T ...
... complexes and the resulting data suggests palladium (II) is formed instead of palladium (0), as previously suggested in the literature. Since these types of complexes are known to be used for catalytic reactions, the initial catalytic studies have been carried out for the Suzuki coupling reaction. T ...
Role of Homogeneous Catalysis in Oligomerization of Olefins
... stability and lifetime. lnteresting relationships between molecular structures of the complex precursor and their reactivity have in some cases been drawn. However, it should be noted that most of the catalysts used in oligomerization are based on Ziegler-Natta type systems, a multi-component ...
... stability and lifetime. lnteresting relationships between molecular structures of the complex precursor and their reactivity have in some cases been drawn. However, it should be noted that most of the catalysts used in oligomerization are based on Ziegler-Natta type systems, a multi-component ...
New inorganic iridium(III) complexes for photonic applications
... We all live in a world, where the visual influences to our daily life are dominant. If you think, for example, of Las Vegas, the big and blazing advertising panels will appear clear in your mind. Until now these panels have consisted almost exclusively of solid state light emitting diodes (LED) made ...
... We all live in a world, where the visual influences to our daily life are dominant. If you think, for example, of Las Vegas, the big and blazing advertising panels will appear clear in your mind. Until now these panels have consisted almost exclusively of solid state light emitting diodes (LED) made ...
Text - Reading`s CentAUR
... slow, so the addition of a phase-transfer catalyst is necessary [e.g., N,N′-dimethyl-N,N′-dioctylethylethoxymalonamide (DMDOHEMA)] if this extractant is to be used for largescale partitioning.19 In an attempt to improve the kinetics of extraction with these tetradentate N-donor extractants, greater ...
... slow, so the addition of a phase-transfer catalyst is necessary [e.g., N,N′-dimethyl-N,N′-dioctylethylethoxymalonamide (DMDOHEMA)] if this extractant is to be used for largescale partitioning.19 In an attempt to improve the kinetics of extraction with these tetradentate N-donor extractants, greater ...
PDF document
... the alkali was added stepwise from an autoburette in small aliquots (0.005–0.01 cm3). The potential was monitored after each addition of titrant. The titration protocol was chosen in such a way that the hydrolysis and complexation reactions would proceed in the conditions as close to true equilibriu ...
... the alkali was added stepwise from an autoburette in small aliquots (0.005–0.01 cm3). The potential was monitored after each addition of titrant. The titration protocol was chosen in such a way that the hydrolysis and complexation reactions would proceed in the conditions as close to true equilibriu ...
Coordination Chemistry Reviews Iron–dinitrogen coordination
... Justin L. Crossland, David R. Tyler ∗ Department of Chemistry, 1253 University of Oregon, Eugene, OR 97403, United States ...
... Justin L. Crossland, David R. Tyler ∗ Department of Chemistry, 1253 University of Oregon, Eugene, OR 97403, United States ...
- Opus
... Thallium (I) coordination is based on a quite different type of metal-ligand interaction: Owing to the relativistically contracted valence shell and the low electrical charge, the Tl+ cation is intermediate in character between standard hard and soft cations and has an affinity for both hard and sof ...
... Thallium (I) coordination is based on a quite different type of metal-ligand interaction: Owing to the relativistically contracted valence shell and the low electrical charge, the Tl+ cation is intermediate in character between standard hard and soft cations and has an affinity for both hard and sof ...
Taking advantage of luminescent lanthanide ions
... metal ion and the highest sublevel of its ground multiplet. The 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 lant ...
... metal ion and the highest sublevel of its ground multiplet. The 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 lant ...
Supporting Information
... The local symmetry and oxidation state of guest POM nanoclusters in the present Zn-CrLDHPOM nanohybrids and their calcined derivatives are also examined using XANES analysis at W LIII-edge and V K-edge. The W LIII-edge XANES spectra of the as-prepared ZCW nanohybrids and their derivatives calcined ...
... The local symmetry and oxidation state of guest POM nanoclusters in the present Zn-CrLDHPOM nanohybrids and their calcined derivatives are also examined using XANES analysis at W LIII-edge and V K-edge. The W LIII-edge XANES spectra of the as-prepared ZCW nanohybrids and their derivatives calcined ...
Transition Metal Polyhydrides: From Qualitative
... a better understanding of the nature of bonding in dihydride complexes. Representative studies were carried out in the early 1980s on NiH2, CoH2, FeH2, and CuH2 at the CI level by Siegbahn and coworkers.51,52 The authors concluded that the most stable electronic state was the linear high-spin state, ...
... a better understanding of the nature of bonding in dihydride complexes. Representative studies were carried out in the early 1980s on NiH2, CoH2, FeH2, and CuH2 at the CI level by Siegbahn and coworkers.51,52 The authors concluded that the most stable electronic state was the linear high-spin state, ...
Introduction 1.1 Background
... ruthenium compounds [Ru(CHR)(PCy3)2X2] and later with sterically protected N-heterocyclic carbenes [Ru(CHR)(NHC)(PCy3)X2], and their metathesis reactions with olefins,27 as well as the mechanism proposed by Chauvin,28 culminated in the Nobel Prize for Chemistry in 2005 being awarded to the aforement ...
... ruthenium compounds [Ru(CHR)(PCy3)2X2] and later with sterically protected N-heterocyclic carbenes [Ru(CHR)(NHC)(PCy3)X2], and their metathesis reactions with olefins,27 as well as the mechanism proposed by Chauvin,28 culminated in the Nobel Prize for Chemistry in 2005 being awarded to the aforement ...
MLCT State Structure and Dynamics of a Copper(I) Diimine
... important roles in photoinduced electron and energy transfer.18-25 Meanwhile, these compounds are functional moieties in molecular devices because of their novel structural reorganization upon CuI/CuII interconversion, induced electrochemically or photochemically.26,27 These reorganization processes ...
... important roles in photoinduced electron and energy transfer.18-25 Meanwhile, these compounds are functional moieties in molecular devices because of their novel structural reorganization upon CuI/CuII interconversion, induced electrochemically or photochemically.26,27 These reorganization processes ...
Construction of Two Microporous MetalOrganic Frameworks with flu
... to have low porosity.29 To solve the problem, Yaghi and coworkers developed a most efficient strategy for the construction of highly porous frameworks with the use of secondary building units (SBUs).30−32 In this strategy, the SBUs replace single metal ions in the MOFs to connect rigid organic ligands ...
... to have low porosity.29 To solve the problem, Yaghi and coworkers developed a most efficient strategy for the construction of highly porous frameworks with the use of secondary building units (SBUs).30−32 In this strategy, the SBUs replace single metal ions in the MOFs to connect rigid organic ligands ...
Absorption spectra of transition metal ions in glasses as functions of
... established by its closest neighboring anions or molecules. All the neighboring anions or molecules are called ligands ...
... established by its closest neighboring anions or molecules. All the neighboring anions or molecules are called ligands ...
Molecular Orbital Study of H2 and CH4 Activation on Small Metal
... that B3LYP calculations give reliable results concerning the electronic structures of the Pd/Pt dimers, in comparison with our CASPT2 calculations and previous theoretical investigations as well as available experimental data. Both Pd2 and Pt2 have triplet ground electronic states, while the singlet ...
... that B3LYP calculations give reliable results concerning the electronic structures of the Pd/Pt dimers, in comparison with our CASPT2 calculations and previous theoretical investigations as well as available experimental data. Both Pd2 and Pt2 have triplet ground electronic states, while the singlet ...
Advanced Structural Inorganic Chemistry (International Union of
... Part II of the book, again consisting of five chapters, discusses the symmetry concept and its importance in structural chemistry. Chapter 6 introduces students to symmetry point groups and the rudiments of group theory without delving into intricate mathematical details. Chapter 7 covers group theor ...
... Part II of the book, again consisting of five chapters, discusses the symmetry concept and its importance in structural chemistry. Chapter 6 introduces students to symmetry point groups and the rudiments of group theory without delving into intricate mathematical details. Chapter 7 covers group theor ...
Davin, Thomas J. (2009) Computational chemistry of organometallic
... Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
... Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Robust thallium(III) complexes with inorganic and organic
... essentially the same in TlBr3(H2O)2, but the chloride complex likely has distorted tetrahedral geometry.17 In the TlX4− complexes where X = Cl, Br, or I, the coordination sphere is tetrahedral with no water molecules in the inner sphere, either in solution or in the solid phase. TlX52– and TlX62– a ...
... essentially the same in TlBr3(H2O)2, but the chloride complex likely has distorted tetrahedral geometry.17 In the TlX4− complexes where X = Cl, Br, or I, the coordination sphere is tetrahedral with no water molecules in the inner sphere, either in solution or in the solid phase. TlX52– and TlX62– a ...
ChemComm FEATURE ARTICLE - Faculty for Chemistry and
... structures and bonding of a wide variety of covalent organic and inorganic molecules and (ii) convey chemical reactions and their mechanisms. However, despite the importance of the concept of the 2c–2e bond and its representation, its limitations as a model are well-known. For example, it is not pos ...
... structures and bonding of a wide variety of covalent organic and inorganic molecules and (ii) convey chemical reactions and their mechanisms. However, despite the importance of the concept of the 2c–2e bond and its representation, its limitations as a model are well-known. For example, it is not pos ...
Oxidative addition of Pd to C–H, C–C and C–Cl bonds:... of relativistic effects in DFT calculations
... type orbitals 共STOs兲 containing diffuse functions: TZ共2兲P.16b,g The TZ共2兲P basis is of triple- quality for all atoms and has been augmented with two sets of polarization functions on maingroup atoms 共3d and 4 f on C and Cl; 2p and 3d on H兲 and an extra set of 5p functions on palladium. The core she ...
... type orbitals 共STOs兲 containing diffuse functions: TZ共2兲P.16b,g The TZ共2兲P basis is of triple- quality for all atoms and has been augmented with two sets of polarization functions on maingroup atoms 共3d and 4 f on C and Cl; 2p and 3d on H兲 and an extra set of 5p functions on palladium. The core she ...
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.