Structural and Spectroscopic Studies of Solvated Metal Ions Alireza Abbasi Doctoral Thesis
... characteristics of the metal-ligand bonding are essential. For example, the lanthanoid(III) and scandium(III) trifluoromethanesulfonate compounds have found increasing use as selective catalysts in organic synthesis as water-tolerant Lewis acids,2,3 and structural studies are needed for elucidating ...
... characteristics of the metal-ligand bonding are essential. For example, the lanthanoid(III) and scandium(III) trifluoromethanesulfonate compounds have found increasing use as selective catalysts in organic synthesis as water-tolerant Lewis acids,2,3 and structural studies are needed for elucidating ...
Thesis - Max Planck Institut für Festkörperforschung
... This thesis deals with the electrocatalytic properties of two-dimensional metalorganic coordination networks (2D-MOCNs) self-assembled on electrode surfaces and catalytic activity of 2D-MOCNs is demonstrated for the first time. The low-coordinated metal centers within these supramolecular structures ...
... This thesis deals with the electrocatalytic properties of two-dimensional metalorganic coordination networks (2D-MOCNs) self-assembled on electrode surfaces and catalytic activity of 2D-MOCNs is demonstrated for the first time. The low-coordinated metal centers within these supramolecular structures ...
Thesis - Max Planck Institut für Festkörperforschung
... for the construction of diverse surface-supported nanosystems. Two main routes are explored, relying on hydrogen-bonding and metal-ligand interactions. The major emphasis is put on the latter approach, where a novel concept to design low-dimensional metal-organic structures is introduced. The transl ...
... for the construction of diverse surface-supported nanosystems. Two main routes are explored, relying on hydrogen-bonding and metal-ligand interactions. The major emphasis is put on the latter approach, where a novel concept to design low-dimensional metal-organic structures is introduced. The transl ...
Metal–dioxygen and metal–dinitrogen complexes: where are the
... through a second side-on interaction, and the resulting binding mode is described as m-h2 :h2 or “side-on/side-on” binding (Fig. 1). The most intense characterization of this binding mode for O2 complexes has come in m-h2 :h2 -peroxodicopper(II) complexes, because they are synthetic analogues for co ...
... through a second side-on interaction, and the resulting binding mode is described as m-h2 :h2 or “side-on/side-on” binding (Fig. 1). The most intense characterization of this binding mode for O2 complexes has come in m-h2 :h2 -peroxodicopper(II) complexes, because they are synthetic analogues for co ...
Chemistry of Molybdenum using CBC
... of compounds Mo(CO)6, Mo(η-C6H6)(CO)3 and Mo(η-C6H6)2 have co-ordination numbers 6, 9, and 12 respectively but the η-benzene ring is often referred to as a 'pseudo three co-ordinate' ligand so that in these three compounds they are deemed to be 'six co-ordinate'. The η5-C5H5 (ηcyclopentadienyl) liga ...
... of compounds Mo(CO)6, Mo(η-C6H6)(CO)3 and Mo(η-C6H6)2 have co-ordination numbers 6, 9, and 12 respectively but the η-benzene ring is often referred to as a 'pseudo three co-ordinate' ligand so that in these three compounds they are deemed to be 'six co-ordinate'. The η5-C5H5 (ηcyclopentadienyl) liga ...
1 Introduction to Hybrid Materials
... hydrogen bonds that are definitely stronger than for example weak coordinative bonds. Table 1.2 presents the energetic categorization of different chemical interactions depending on their binding energies. In addition to the bonding characteristics structural properties can also be used to distinguis ...
... hydrogen bonds that are definitely stronger than for example weak coordinative bonds. Table 1.2 presents the energetic categorization of different chemical interactions depending on their binding energies. In addition to the bonding characteristics structural properties can also be used to distinguis ...
Chapter 10 Chemical Bonding Theories
... adjacent atoms. Orbitals arrange around central atom to avoid each other. Two types of bonds: sigma and pi. ...
... adjacent atoms. Orbitals arrange around central atom to avoid each other. Two types of bonds: sigma and pi. ...
Chapter 1 Introduction - Heriot
... neutral or anionic. The chemistry of boranes was first studied systematically by Alfred Stock and his research group beginning in 1912 and continuing for almost 25 years.4 Stock developed the glass vacuum line and techniques for using it, which enabled him to synthesise and characterise these novel ...
... neutral or anionic. The chemistry of boranes was first studied systematically by Alfred Stock and his research group beginning in 1912 and continuing for almost 25 years.4 Stock developed the glass vacuum line and techniques for using it, which enabled him to synthesise and characterise these novel ...
Chapter 10 Chemical Bonding Theories
... Bonds form using shared electrons between overlapping orbitals on adjacent atoms. Orbitals arrange around central atom to avoid each other. Two types of bonds: sigma and pi. ...
... Bonds form using shared electrons between overlapping orbitals on adjacent atoms. Orbitals arrange around central atom to avoid each other. Two types of bonds: sigma and pi. ...
Substituent groups in aryl- and arylalkylphosphanes: effects on
... complexes possess properties that make them suitable for a wide range of catalytic reactions [39]. Sometimes they are even the only systems available: for example, the much higher electron density on metal-containing trialkylphosphanes facilitates oxidative addition reactions, even of difficult subs ...
... complexes possess properties that make them suitable for a wide range of catalytic reactions [39]. Sometimes they are even the only systems available: for example, the much higher electron density on metal-containing trialkylphosphanes facilitates oxidative addition reactions, even of difficult subs ...
Chapter 12
... amine adduct with BF3 . Since the enthalpy of adduct formation is least favorable with BF3, however, it is concluded that the loss in BX double-bond character upon rehybridization to form an adduct is greater with BF3 than in the other tri halides. From this we can conclude that the double-bond cha ...
... amine adduct with BF3 . Since the enthalpy of adduct formation is least favorable with BF3, however, it is concluded that the loss in BX double-bond character upon rehybridization to form an adduct is greater with BF3 than in the other tri halides. From this we can conclude that the double-bond cha ...
Structural Diversity in Metal Phosphonate Frameworks: Impact on
... strong bonds with metal ions Mn1 (n ¼ 1–4). The phosphonic acid moiety, R-PO3H2 and its two deprotonated forms, R-PO3H and R-PO32– exhibit an interesting, pH-dependent behavior (Figure 14.2). Usually the first proton is very acidic, while the second is a couple orders of magnitude less acidic.83–89 ...
... strong bonds with metal ions Mn1 (n ¼ 1–4). The phosphonic acid moiety, R-PO3H2 and its two deprotonated forms, R-PO3H and R-PO32– exhibit an interesting, pH-dependent behavior (Figure 14.2). Usually the first proton is very acidic, while the second is a couple orders of magnitude less acidic.83–89 ...
Is CO a Special Ligand in Organometallic Chemistry? Theoretical
... balanced σ donation (through 5σ) and π acceptance (through 2π) are what makes CO a good donor, of course. The gap between these frontier orbitals (5σ and 2π) becomes even smaller in SiO and BF. The analysis of the bonding mechanism of the Fe-AB bond shows that SiO is a better σ donor but a worse π a ...
... balanced σ donation (through 5σ) and π acceptance (through 2π) are what makes CO a good donor, of course. The gap between these frontier orbitals (5σ and 2π) becomes even smaller in SiO and BF. The analysis of the bonding mechanism of the Fe-AB bond shows that SiO is a better σ donor but a worse π a ...
Fatimah Final Thesis
... modes have been observed also for Se and Te after the mid-1970s.4,5 The properties of metal–sulfur structures have been studied extensively in chemistry. The significance of related complexes has been increased since 1960, owing to their wide spectrum of properties and their importance in hydrodesul ...
... modes have been observed also for Se and Te after the mid-1970s.4,5 The properties of metal–sulfur structures have been studied extensively in chemistry. The significance of related complexes has been increased since 1960, owing to their wide spectrum of properties and their importance in hydrodesul ...
ATOMISTIC INTERACTIONS IN STM ATOM MANIPULATION A
... Director of Dissertation: Saw-Wai Hla This thesis describes the study of two diverse systems, a cluster of silver atoms, and individual silver and bromine atoms, deposited on a metallic single crystal Ag(111) substrate, in the domain of atomic and molecular manipulation techniques, using a custom-bu ...
... Director of Dissertation: Saw-Wai Hla This thesis describes the study of two diverse systems, a cluster of silver atoms, and individual silver and bromine atoms, deposited on a metallic single crystal Ag(111) substrate, in the domain of atomic and molecular manipulation techniques, using a custom-bu ...
View
... as evidenced by its relatively accessible one-electron reduction potential,5 possesses electron-acceptor properties, which can be tuned by the substituents,6 and also luminescence properties in some derivatives.7 The large majority of the coordinating units attached to the 2,4,6 positions of the 1,3 ...
... as evidenced by its relatively accessible one-electron reduction potential,5 possesses electron-acceptor properties, which can be tuned by the substituents,6 and also luminescence properties in some derivatives.7 The large majority of the coordinating units attached to the 2,4,6 positions of the 1,3 ...
Lithium, Sodium and Potassium Magnesiate Chemistry: A Structural
... Another common motif in organomagnesiate chemistry occurs when the compound is rich in alkali metal with respect to magnesium. In general, two factors can lead to this scenario: 1) and most obviously, if the organolithium to organomagnesium reagent ratio employed in the synthesis is 2:1; 2) if the s ...
... Another common motif in organomagnesiate chemistry occurs when the compound is rich in alkali metal with respect to magnesium. In general, two factors can lead to this scenario: 1) and most obviously, if the organolithium to organomagnesium reagent ratio employed in the synthesis is 2:1; 2) if the s ...
Structural and Functional Characterization of Luminescent Silver
... spherical jellium model,16 i.e., emission energy, E ) Efermi/N1/3, gives the corresponding emission maximum to be around 700 nm, which is close to the experimentally observed emission maximum (680 nm) obtained from the CHT-conjugated Ag NCs (Figure 3). However, it has to be mentioned that the emissi ...
... spherical jellium model,16 i.e., emission energy, E ) Efermi/N1/3, gives the corresponding emission maximum to be around 700 nm, which is close to the experimentally observed emission maximum (680 nm) obtained from the CHT-conjugated Ag NCs (Figure 3). However, it has to be mentioned that the emissi ...
msc_pre_chemistry_pap1_bl2
... and diamagnetism in the sample. Even though the latter will be small, it is not always valid to consider it negligible. The most common procedure is to correct a measured susceptibility for the diamagnetic contribution. Compilations of data from susceptibility measurements on a number of diamagneti ...
... and diamagnetism in the sample. Even though the latter will be small, it is not always valid to consider it negligible. The most common procedure is to correct a measured susceptibility for the diamagnetic contribution. Compilations of data from susceptibility measurements on a number of diamagneti ...
Chapter 1: General Introduction
... usually a carbon substituent (sp, sp2, sp3–C) and less stabilization, through π–interaction, is expected to come from a carbon substituent than from the metal or oxygen substituent. If it is an aromatic ring, for instance, π–interaction between it and the carbene carbon would correspond to a loss of ...
... usually a carbon substituent (sp, sp2, sp3–C) and less stabilization, through π–interaction, is expected to come from a carbon substituent than from the metal or oxygen substituent. If it is an aromatic ring, for instance, π–interaction between it and the carbene carbon would correspond to a loss of ...
Complexometric Titration
... electron from a molecule or anion to form covalent bonds and produce coordination compound or complexes. Molecule or ion with at least 1 pair of unshared electron can form covalent bond with metal ion = ligands The bonding between metal and ligand generally involves formal donation of one or more of ...
... electron from a molecule or anion to form covalent bonds and produce coordination compound or complexes. Molecule or ion with at least 1 pair of unshared electron can form covalent bond with metal ion = ligands The bonding between metal and ligand generally involves formal donation of one or more of ...
full paper - Wayne State Chemistry Department
... partially filled d shells.[8,9] There has been one previous report of a (pyrazolato)vanadium complex, [(TpiPr2V(O)(µOH)(µ-PziPr2)V(O)(µ-OH)(µ-PziPr2)V(O)TpiPr2)], which was obtained by partial hydrolysis of a vanadium(IV) hydrotris(3,5-diisopropyl-1-pyrazolyl)borate complex.[16] The 3,5-diisopropylp ...
... partially filled d shells.[8,9] There has been one previous report of a (pyrazolato)vanadium complex, [(TpiPr2V(O)(µOH)(µ-PziPr2)V(O)(µ-OH)(µ-PziPr2)V(O)TpiPr2)], which was obtained by partial hydrolysis of a vanadium(IV) hydrotris(3,5-diisopropyl-1-pyrazolyl)borate complex.[16] The 3,5-diisopropylp ...
Introduction to CFT with application to metalloporphyrins
... Keywords: High valent, iron, manganese, cobalt, corrolazine, corrole, ligand noninnocence, metal-ligand orbital overlap. Abstract: To contribute to the fundamental picture of the electronic structure of high valent first row transition metal complexes, I have carried out a density functional study o ...
... Keywords: High valent, iron, manganese, cobalt, corrolazine, corrole, ligand noninnocence, metal-ligand orbital overlap. Abstract: To contribute to the fundamental picture of the electronic structure of high valent first row transition metal complexes, I have carried out a density functional study o ...
Molecular Dynamics Simulation of the
... sizes of the micelles. It was stated only that the aggregates were very dynamic and flexible. There are also theoretical communications in the literature, addressing the aggregation process of BS mostly by molecular dynamics (MD) simulations. Partay et al.15 studied the behavior of aqueous solutions ...
... sizes of the micelles. It was stated only that the aggregates were very dynamic and flexible. There are also theoretical communications in the literature, addressing the aggregation process of BS mostly by molecular dynamics (MD) simulations. Partay et al.15 studied the behavior of aqueous solutions ...
A fluoro-bridged dinuclear nickel(II) compound from
... achieved by bimetallic activation of BF4− as illustrated in Scheme 1, is intriguing. Dinuclear entities have ubiquitous presence in metalloenzymes known for cooperative activation of biologically relevant molecules4. Suitably designed bimetallic complexes have also been demonstrated as biomimetic ca ...
... achieved by bimetallic activation of BF4− as illustrated in Scheme 1, is intriguing. Dinuclear entities have ubiquitous presence in metalloenzymes known for cooperative activation of biologically relevant molecules4. Suitably designed bimetallic complexes have also been demonstrated as biomimetic ca ...