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Author: Evelien Rijnberg
Publisher:
ISBN: 9789039313077
Category :
Languages : en
Pages : 110
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Author: Evelien Rijnberg
Publisher:
ISBN: 9789039313077
Category :
Languages : en
Pages : 110
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Book Description
Author: Elky Almaraz
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Small molecule Zn(II) complexes containing N- and S- donor environments may serve as appropriate models for mimicking Zn protein sites, and thus, their reactions with heavy metal ions such as Pt(II) and W(0) may provide insight into possible adduct formation and zinc displacement. To study such possible interactions between zinc finger proteins and platinum-bound DNA, the ZnN2S2 dimeric complex, N, N'-bis(2- mercaptoethyl)-1,4-diazacycloheptane zinc (II), [Zn-1']2, has been examined for Znbound thiolate reactivity in the presence of Pt(II) nitrogen - rich compounds. The reactions yielded Zn/Pt di- and tri- nuclear thiolate-bridged adducts and metalexchanged products, which were initially observed via ESI-mass spectrometry (ESI-MS) analysis of reaction solutions, and ultimately verified by comparison to the ESI-MS analysis, 195Pt NMR spectroscopy, and X-ray crystallography of directly synthesized complexes. The isolation of Zn-([micron]-SR)-Pt-bridged [(Zn(bme-dach)Cl)(Pt(dien))]Cl adduct from these studies is, to our knowledge, the first Zn-Pt bimetallic thiolatebridged model demonstrating the interaction between Zn-bound thiolates and Pt(II). Additional derivatives involving Pd(II) and Au(III) have been explored to parallel the experiments executed with Pt(II). The [Zn-1']2 was then modified by cleavage with Na+[ICH2CO2]- to produce (N- (3-Thiabutyl)-N'-(3-thiapentaneoate)-1,4-diazacycloheptane) zinc(II), Zn-1'-Ac or ZnN2SS'O, and 1,4-diazacycloheptane-1,4-diylbis(3-thiapentanoato) zinc(II), Zn-1'-Ac2 or ZnN2S'2O2, monomeric complexes (where S = thiolate, S' = thioether). The [Zn-1']2 di- and Zn-1'-Ac mono-thiolato complexes demonstrated reactivity towards labile-ligand tungsten carbonyl species, (THF)W(CO)5 and (pip)2W(CO)4, to yield, respectively, the [(Zn-1'-Cl)W(CO)4]- complex and the [(Zn-1'-Ac)W(CO)5]x coordination polymer. With the aid of CO ligands for IR spectral monitoring, the products were isolated and characterized spectroscopically, as well as by X-ray diffraction and elemental analysis. To examine the potential for zinc complexes (or zinc-templated ligands) to possibly serve as a toxic metal remediation agents, Zn-1'-Ac and Zn-1'-Ac2 were reacted with Ni(BF4)2. The formation of Zn/Ni exchanged products confirmed the capability of "free" Ni(II) to displace Zn(II) within the N-, S-, and O- chelate environment. The Zn/Ni exchanged complexes were analyzed by ESI-MS, UV-visible spectroscopy, IR spectroscopy of the acetate regions, and X-ray crystallography. They serve as foundation molecules for more noxious metal exchange / zinc displacement products.
Author: Xiaoge Gregory Zhang
Publisher: Springer Science & Business Media
ISBN: 9780306453342
Category : Science
Languages : en
Pages : 500
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Book Description
Humankind's use of zinc stretches back to antiquity, and it was a component in some of the earliest known alloy systems. Even though metallic zinc was not "discovered" in Europe until 1746 (by Marggral), zinc ores were used for making brass in biblical times, and an 87% zinc alloy was found in prehistoric ruins in Transylvania. Also, zinc (the metal) was produced in quantity in India as far back as the thirteenth century, well before it was recognized as being a separate element. The uses of zinc are manifold, ranging from galvanizing to die castings to electronics. It is a preferred anode material in high-energy-density batteries (e.g., Ni/Zn, Ag/Zn, ZnJair), so that its electrochemistry, particularly in alkaline media, has been extensively explored. In the passive state, zinc is photoelectrochemically active, with the passive film displaying n-type characteristics. For the same reason that zinc is considered to be an excellent battery anode, it has found extensive use as a sacrificial anode for the protection of ships and pipelines from corrosion. Indeed, aside from zinc's well-known attributes as an alloying element, its widespread use is principally due to its electrochemical properties, which include a well-placed position in the galvanic series for protecting iron and steel in natural aqueous environments and its reversible dissolution behavior in alkaline solutions.
Author: Johannes Notni
Publisher:
ISBN:
Category :
Languages : en
Pages : 19
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Book Description
Author: Zvi Rappoport
Publisher: John Wiley & Sons
ISBN: 0470093382
Category : Science
Languages : en
Pages : 1140
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Book Description
The Patai Series publishes comprehensive reviews on all aspects of specific functional groups. Each volume contains outstanding surveys on theoretical and computational aspects, NMR, MS, other spectroscopic methods and analytical chemistry, structural aspects, thermochemistry, photochemistry, synthetic approaches and strategies, synthetic uses and applications in chemical and pharmaceutical industries, biological, biochemical and environmental aspects. To date, over 110 volumes have been published in the series. Recently Published Titles The chemistry of the Cyclopropyl Group (Volume 2) The chemistry of the Hydrazo, Azo and Azoxy Groups (Volume 2, 2 parts) The chemistry of Double-Bonded Functional Groups (Volume 3, 2 parts) The chemistry of Organophosphorus Compounds (Volume 4) The chemistry of Halides, Pseudo-Halides and Azides (Volume 2, 2 parts) The chemistry of the Amino, Nitro and Nitroso Groups (2 volumes, 2 parts) The chemistry of Dienes and Polyenes (2 volumes) The chemistry of Organic Derivatives of Gold and Silver The chemistry of Organic Silicon Compounds (2 volumes, 4 parts) The chemistry of Organic Germanium, Tin and Lead Compounds (Volume 2, 2 parts) The chemistry of Phenols (2 parts) The chemistry of Organolithium Compounds (2 volumes, 3 parts) The chemistry of Cyclobutanes (2 parts) The chemistry of Peroxides (Volume 2, 2 parts) The chemistry of Organozinc Compounds (2 parts) Forthcoming Titles The chemistry of Anilines The chemistry of Organomagnesium Compounds The Patai Series Online The Patai Series is available in electronic format on Wiley InterScience. All new titles will be published as online books and a growing list of older titles will be added every year. It is the ultimate goal that all titles published in the Patai Series will be available in electronic format. For more information see under Online Books on: www.interscience.wiley.com
Author: Vasyl Tomashyk
Publisher: CRC Press
ISBN: 1482236524
Category : Science
Languages : en
Pages : 628
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Book Description
A companion volume to Ternary Alloys Based on II-VI Semiconductor Compounds (CRC Press, 2013) and Quaternary Alloys Based on II-VI Semiconductor Compounds (CRC Press, 2014), Multinary Alloys Based on II-VI Semiconductors provides up-to-date experimental and theoretical information on phase relations based on II-VI semiconductor systems with five or
Author: Philip L. Fuchs
Publisher: John Wiley & Sons
ISBN: 0470710233
Category : Technology & Engineering
Languages : en
Pages : 859
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Book Description
Over the last three decades the importance of organosilicon chemistry has greatly increased because it has opened a number of new synthetic strategies. Silicon reagents are usually low-cost, versatile and allow a wide range of reactions. This is the first Handbook to compile essential Silicon containing reagents and makes use of the leading reagent database e-EROS. Another hot volume in the series Handbooks of Reagents for Organic Synthesis, this is a must-have resource for all synthetic chemists working in drug development and medicinal chemistry. For the selection the Editor focussed on three key synthetic approaches with the greatest impact: 1. Use of silicon as a 'temporary tether' by unifying a reactive pair of functional groups and taking advantage of their template-biased intramolecular cyclization. 2. The specific use of the silane functionality as a hetero t-butyl group, often colloquially referred to as the use of silicon as a 'fat proton'. 3. The use of the Brook rearrangement as an 'anion relay stratagem'. A new feature in this Handbook is the reagent finder, an alphabetically organized lookup table arranged by organic functionality and specific structure of the silicon atom to which it is bound.
Author: United States. Environmental Protection Agency. Office of Toxic Substances
Publisher:
ISBN:
Category : Chemical industry
Languages : en
Pages : 804
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Book Description
Author: Jennifer Anne Garden
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: National Institute for Occupational Safety and Health
Publisher:
ISBN:
Category : Industrial toxicology
Languages : en
Pages : 1000
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Book Description
"This compilation will provide ready reference for potential toxicity of chemicals found in the workplace, and should be useful to occupational health physicians, industrial hygienists, toxicologists, and researchers." Alphabetical arrangement by substances. Entries include such details as molecular weight, Wiswesser Line Notation, synonyms, and reference from which data about toxicity derived. Miscellaneous appendixes, including one titled Aquatic toxicity. Bibliographic references.
