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Homogeneous Catalysis and Mechanisms in Water and Biphasic Media

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ISBN: 9783038975847 / 9783038975854 Year: Pages: 158 DOI: 10.3390/books978-3-03897-585-4 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemistry (General) --- Chemical Engineering
Added to DOAB on : 2019-02-15 11:22:55
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Abstract

In recent years, water phase chemistry and catalysis has witnessed a renewed interest, also in view of increasing environmental and economical concerns. Novel approaches, materials, and catalysts have been designed, for example, to convey the properties of known transition metal catalysts to their water-soluble analogs, reaching high activities and selectivities. This was possible thanks to new synthetic pathways to molecular catalysts, new mechanistic insights into the role of water as a non-innocent solvent, the use of theoretical methods and advanced engineering techniques, and the application of novel concepts for phase transfer agents in biphasic catalysis.The book contains three review articles and six research articles, addressing topics related to water phase chemistry and catalysis, ranging from the use of cyclodextrins as mass transfer agents in biphasic catalysis, to water-soluble catalyst design for targeted chemical transformation, to the application of ultrasonic monitoring of biocatalysis in water, covering aspects such as chemical synthesis, various aspects of catalysis, and engineering solutions. The range of topics addressed in this book will stimulate the reader’s interest and provide a valuable source of information for researchers in academia and industry.

Amide Bond Activation

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ISBN: 9783039212033 / 9783039212040 Year: Pages: 466 DOI: 10.3390/books978-3-03921-204-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General)
Added to DOAB on : 2019-08-28 11:21:27
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The amide bond represents a privileged motif in chemistry. The recent years have witnessed an explosion of interest in the development of new chemical transformations of amides. These developments cover an impressive range of catalytic N–C bond activation in electrophilic, Lewis acid, radical, and nucleophilic reaction pathways, among other transformations. Equally relevant are structural and theoretical studies that provide the basis for chemoselective manipulation of amidic resonance. This monograph on amide bonds offers a broad survey of recent advances in activation of amides and addresses various approaches in the field.

Keywords

fumardiamide --- primaquine --- succindiamide --- Michael acceptor --- biofilm eradication --- antibacterial screening --- antiviral activity --- cytostatic activity --- N,N-dimethylformamide --- DMF --- N,N-dimethylacetamide --- DMAc --- amination --- amidation --- thioamidation --- formylation --- carbonylation --- cyanation --- insertion --- cyclization --- amide --- arynes --- insertion --- activation --- heterocycles --- organic synthesis --- multi-component coupling reaction --- aryl thioamides --- thiourea --- C-H/C-N activation --- C-S formation --- transition-metal-free --- rotational barrier energy --- amide bond --- nuclear magnetic resonance --- kinetic --- density functional theory --- non planar amide --- base-catalyed hydrolysis --- water solvation --- entropy --- transamidation --- amide --- amine --- catalyst --- catalysis --- acylative cross-coupling --- trialkylborane --- amide activation --- palladium --- N-heterocyclic carbene --- ruthenium (Ru) --- N-heterocyclic carbenes (NHCs) --- homogeneous catalysis --- in situ --- amide bonds --- synthesis --- density functional theory --- cis/trans isomerization --- secondary amides --- dipeptides --- steric effects --- tert-butyl --- additivity principle --- amino acid transporters --- amide bond --- gemcitabine prodrug --- metabolic stability --- pancreatic cancer cells --- pharmacokinetics --- peptide bond cleavage --- amide bond resonance --- twisted amides --- enzymes --- metal complexes --- catalysts --- amide C–N bond activation --- nickel catalysis --- amidation --- DFT study --- reaction thermodynamics --- amide resonance --- anomeric effect --- HERON reaction --- pyramidal amides --- physical organic chemistry --- reaction mechanism --- amide --- activation --- amidicity --- carbonylicity --- transamidation --- acyl transfer --- excited state --- Suzuki-Miyaura --- cross-coupling --- aryl esters --- C–O activation --- Pd-catalysis --- amides --- carbanions --- C–H acidity --- nitro-aci tautomerism --- molecular dynamics --- density-functional theory --- alkynes --- C–H bond cleavage --- C–N bond cleavage --- cyclopentadienyl complexes --- N-(1-naphthyl)acetamide --- rhodium --- [2+2+2] annulation --- amide bond --- sulfonamide bond --- alkynes --- addition reaction --- aminoacylation --- aminosulfonylation --- pre-catalysts --- palladium catalysis --- amide bond activation --- ester bond activation --- cross-coupling --- amide bond --- bridged lactams --- twisted amides --- amides --- Winkler-Dunitz parameters --- N–C activation --- hypersensitivity --- nitrogen heterocycles --- distortion --- bridged sultams --- amides --- C-N ? bond cleavage --- sodium --- crown ether --- amide hydrolysis --- model compound --- intramolecular catalysis --- twisted amide --- protease --- intein --- C-H functionalization --- directing groups --- amides --- transition metals --- catalysis

Coordination Chemistry of Silicon

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ISBN: 9783038976387 Year: Pages: 225 DOI: 10.3390/books978-3-03897-639-4 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General) --- Inorganic Chemistry
Added to DOAB on : 2019-03-08 11:42:05
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Abstract

The chemistry of silicon has always been a field of major concern due to its proximity to carbon on the periodic table. From the molecular chemist's viewpoint, one of the most interesting differences between carbon and silicon is their divergent coordination behavior. In fact, silicon is prone to form hyper-coordinate organosilicon complexes, and, as conveyed by reports in the literature, highly sophisticated ligand systems are required to furnish low-coordinate organosilicon complexes. Tremendous progress in experimental, as well as computational, techniques has granted synthetic access to a broad range of coordination numbers for silicon, and the scientific endeavor, which was ongoing for decades, was rewarded with landmark discoveries in the field of organosilicon chemistry. Molecular congeners of silicon(0), as well as silicon oxides, were unveiled, and the prominent group 14 metalloid proved its applicability in homogenous catalysis as a supportive ligand or even as a center of catalytic activity. This book focuses on the most recent advances in the coordination chemistry of silicon with transition metals as well as main group elements, including the stabilization of low-valent silicon species through the coordination of electron donor ligands. Therefore, this book is associated with the development of novel synthetic methodologies, structural elucidations, bonding analysis, and also possible applications in catalysis or chemical transformations using related organosilicon compounds.

Keywords

silanetriols --- disiloxane tetrols --- silsesquioxanes --- condensation --- molecular cage --- platinum --- primary silane --- hydrido complex --- oxidative addition --- ligand-exchange reaction --- X-ray crystallography --- Si–Cl activation --- germylene --- digermene --- digermacyclobutadiene --- palladium --- cluster --- cyclic organopolysilane --- template --- bridging silylene ligand --- isocyanide --- hydrogen bonds --- silicon --- 2-silylpyrrolidines --- stereochemistry --- X-ray crystallography --- Baird’s rule --- computational chemistry --- excited state aromaticity --- Photostability --- dye-sensitized solar cell --- disilanylene polymer --- photoreaction --- surface modification --- TiO2 --- silylene --- germylene --- N-heterocyclic carbene --- oxidative addition --- siloxanes --- host-guest chemistry --- supramolecular chemistry --- main group coordination chemistry --- hydrogen bonding --- adsorption --- bond activation --- bonding analysis --- density functional theory --- distorted coordination --- molecular orbital analysis --- silicon surfaces --- disilene --- functionalization --- ?-electron systems --- silicon --- N-heterocyclic carbenes --- bromosilylenes --- silyliumylidenes --- dehydrobromination --- silicon cluster --- siliconoid --- nanoparticle --- computation --- silicon --- N-heterocyclic carbenes --- silyliumylidenes --- small molecule activation --- mechanistic insights --- organosilicon --- reductant --- N-Heterocyclic tetrylene --- salt-free --- germanium --- germanethione --- germathioacid chloride --- N-heterocyclic carbines --- ?-chloro-?-hydrooligosilane --- titanium --- ruthenium --- dehydrogenative alkoxylation --- cluster --- isomerization --- silicon --- siliconoid --- subvalent compounds --- AIM --- DFT --- intermetallic bond --- 29Si NMR spectroscopy --- X-ray diffraction

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