Author: Stojan Radulovic
Publisher:
ISBN:
Category : Reactivity (Chemistry)
Languages : en
Pages : 0
Book Description
Solvation, Reactivity and Spectroscopy of Complexes of Some First Row Transition Metals
Author: Stojan Radulovic
Publisher:
ISBN:
Category : Reactivity (Chemistry)
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category : Reactivity (Chemistry)
Languages : en
Pages : 0
Book Description
Solvation, Reactivity and Spectroscopy of Complexes of Some First Row Transition Metals
Author: S. Radulovic
Publisher:
ISBN:
Category : Reactivity (Chemistry)
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Reactivity (Chemistry)
Languages : en
Pages :
Book Description
Spectroscopy, Solvation and Reactivity of Transition Metal Complexes with Pi -acceptor Ligands
Author: R. Bin Ali
Publisher:
ISBN:
Category : Ligands (Biochemistry)
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category : Ligands (Biochemistry)
Languages : en
Pages : 0
Book Description
Solvation, Ionic, and Complex Formation Reactions in Non-aqueous Solvents
Author: Kálmán Burger
Publisher:
ISBN:
Category : Complex compounds
Languages : en
Pages : 276
Book Description
Publisher:
ISBN:
Category : Complex compounds
Languages : en
Pages : 276
Book Description
Reactivity and Thermochemistry of First-row Transition Metal Complexes with Stable Organic Radicals
Author: Thomas R. Porter
Publisher:
ISBN:
Category :
Languages : en
Pages : 179
Book Description
Reactions involving transition metals and organic free radicals are critically important in a variety of chemical and biological processes. Because of their prevalence, there is a fundamental interest in better understanding these types of reactions to fully realize their potential for new applications. The work presented in this dissertation describes the free radical reactivity and thermochemistry of several different transition metal systems with stable organic radicals. Chapter 1 provides an introduction to transition metal reactivity involving organic free radicals. Chapter 2 describes the catalytic disproportionation of a hydroxylamine by (TMP)Fe[superscript III]-OH (TMP = meso-tetramesityl porphyrin) and some of the radical reactions that make up the catalytic cycle. Chapter 3 describes the preparation, structural characterization and thermochemistry of a previously unreported stable organic radical, [superscript t]Bu2NPArO* (2,6-di-tert-butyl-4-(4'-nitrophenyl)phenoxyl). Chapter 4 describes the preparation of several [Tp[superscript tBu]Cu[superscript II]]+ (Tp[superscript tBu] = hydro-tris(3-tert-butyl-pyrazolyl)borate) and [Tp[superscript tBuMe]Cu[superscript II]]+ (Tp[superscript tBu]Me = hydro-tris(3-tert-butyl-5-methyl-pyrazolyl)borate) alkoxide compelxes as models for potential intermediates in copper/radical alcohol oxidation catalysis. Treating these complexes with stable radicals such a [superscript t]Bu3ArO* (2,4,6-tri-tert-butyl-phenoxyl) did not result in alkoxide oxidation despite having a large driving force. From these studies, we conclude driving force is not a primary predictor for copper/radical alcohol oxidation. Chapter 5 discusses the coordination chemistry of [Tp[supercscript tBu]Cu[superscript II]]+ and [Tp[superscript tBu]Zn[superscript II]]+ with 4-nitro-phenols. With the bulky 2,6-disubstituted 2,6-di-tert-butyl-4-nitro-phenoxide, coordination to either metal occurs through a nitronate resonance form. The 2,6-unsubstituted 4-nitro-phenol binds through the phenoxide resonance form. Chapter 6 highlights the large kinetic barrier for ketone reduction or oxidation by titanocene(III/IV) and the hydrogen atom donor/acceptor, [superscript t]Bu3ArO(-H). Finally, Chapter 7 describes the selective and stoichiometric reduction of aromatic and aliphatic nitro groups by photoreduced titanium dioxide nanoparticles in acidic aqueous solutions. From thermochemical analysis, it is likely that these reactions proceed through a rate determining H+/e- transfer.
Publisher:
ISBN:
Category :
Languages : en
Pages : 179
Book Description
Reactions involving transition metals and organic free radicals are critically important in a variety of chemical and biological processes. Because of their prevalence, there is a fundamental interest in better understanding these types of reactions to fully realize their potential for new applications. The work presented in this dissertation describes the free radical reactivity and thermochemistry of several different transition metal systems with stable organic radicals. Chapter 1 provides an introduction to transition metal reactivity involving organic free radicals. Chapter 2 describes the catalytic disproportionation of a hydroxylamine by (TMP)Fe[superscript III]-OH (TMP = meso-tetramesityl porphyrin) and some of the radical reactions that make up the catalytic cycle. Chapter 3 describes the preparation, structural characterization and thermochemistry of a previously unreported stable organic radical, [superscript t]Bu2NPArO* (2,6-di-tert-butyl-4-(4'-nitrophenyl)phenoxyl). Chapter 4 describes the preparation of several [Tp[superscript tBu]Cu[superscript II]]+ (Tp[superscript tBu] = hydro-tris(3-tert-butyl-pyrazolyl)borate) and [Tp[superscript tBuMe]Cu[superscript II]]+ (Tp[superscript tBu]Me = hydro-tris(3-tert-butyl-5-methyl-pyrazolyl)borate) alkoxide compelxes as models for potential intermediates in copper/radical alcohol oxidation catalysis. Treating these complexes with stable radicals such a [superscript t]Bu3ArO* (2,4,6-tri-tert-butyl-phenoxyl) did not result in alkoxide oxidation despite having a large driving force. From these studies, we conclude driving force is not a primary predictor for copper/radical alcohol oxidation. Chapter 5 discusses the coordination chemistry of [Tp[supercscript tBu]Cu[superscript II]]+ and [Tp[superscript tBu]Zn[superscript II]]+ with 4-nitro-phenols. With the bulky 2,6-disubstituted 2,6-di-tert-butyl-4-nitro-phenoxide, coordination to either metal occurs through a nitronate resonance form. The 2,6-unsubstituted 4-nitro-phenol binds through the phenoxide resonance form. Chapter 6 highlights the large kinetic barrier for ketone reduction or oxidation by titanocene(III/IV) and the hydrogen atom donor/acceptor, [superscript t]Bu3ArO(-H). Finally, Chapter 7 describes the selective and stoichiometric reduction of aromatic and aliphatic nitro groups by photoreduced titanium dioxide nanoparticles in acidic aqueous solutions. From thermochemical analysis, it is likely that these reactions proceed through a rate determining H+/e- transfer.
Synthesis, Reactivity and Catalytic Applications of Two-Coordinate First Row Transition Metal Complexes
Author: Michael Isaac Lipschutz
Publisher:
ISBN:
Category :
Languages : en
Pages : 139
Book Description
Recently, the development of more sustainable catalytic systems based on abundant first-row metals, especially nickel, for organic transformations has attracted significant interest. This thesis describes the development of new synthetic methods for the preparation of two-coordinate complexes of a variety of first row transition metals. The physical and spectroscopic properties of these complexes are discussed and the reactivity and catalytic applications of these compounds are also explored. Species of this type are found to catalyze a variety of useful organic transformations using inexpensive metals and ligands.
Publisher:
ISBN:
Category :
Languages : en
Pages : 139
Book Description
Recently, the development of more sustainable catalytic systems based on abundant first-row metals, especially nickel, for organic transformations has attracted significant interest. This thesis describes the development of new synthetic methods for the preparation of two-coordinate complexes of a variety of first row transition metals. The physical and spectroscopic properties of these complexes are discussed and the reactivity and catalytic applications of these compounds are also explored. Species of this type are found to catalyze a variety of useful organic transformations using inexpensive metals and ligands.
Tetraphenylcyclopentadienyl Complexes of First Row Transition Metals
Author: Michael Paul Castellani
Publisher:
ISBN:
Category : Phenyl compounds
Languages : en
Pages : 322
Book Description
Publisher:
ISBN:
Category : Phenyl compounds
Languages : en
Pages : 322
Book Description
University of London King's College, Department of Chemistry, Research Publications 1972-1973
Author: Stephen Finney Mason
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 3
Book Description
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 3
Book Description
The Structure, Reactivity and Spectroscopy of Selected Transition Metal Complexes
Complexes and First-row Transition Elements
Author: David Nicholls
Publisher: Elsevier Science & Technology
ISBN:
Category : Science
Languages : en
Pages : 244
Book Description
Publisher: Elsevier Science & Technology
ISBN:
Category : Science
Languages : en
Pages : 244
Book Description