Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 256
Book Description
Nuclear Magnetic Resonance Studies of Complexes of Group IV Elements in Aqueous Solution
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 256
Book Description
Nuclear Magnetic Resonance Studies of Complexes of Group(IV) Elements in Aqueous Solution
Author: Jonathon ParrPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Nuclear Magnetic Resonance Studies of Metal- Ethylenediaminetetraacetic Acid Complexes
Author: Charles Milton FinleyPublisher:
ISBN:
Category : Ethylenediaminetetraacetic acid
Languages : en
Pages : 74
Book Description
Nuclear Magnetic Resonance Studies of the Solution Chemistry of Aqueous Trimethyllead and Its Complexes with Sulfhydryl Ligands
Author: Stanley John BacksPublisher:
ISBN:
Category : Nuclear magnetic resonance
Languages : en
Pages : 0
Book Description
The aqueous solution chemistry of trimethyllead(IV) and of the trimethyllead(IV) complexes of selected organic ligands has been investigated by proton magnetic resonance spectroscopy. The formation constants for the (CH-Pb" 1 " complexes of hydroxide ion and of the various sulfhydryl and carboxyl functional groups of 2-mercaptoethanol, glycine, N-acetyl-D,L-penicillamine, D,L-penicillamine, L-cysteine and glutathione were deter- mined from the pH dependence of the chemical shift of the methyl protons of trimethyllead. One-to-one stoichiometry was dominant in all experimental cases. In addition, weak two-to-one metal-to-ligand complexes were observed for the trimethyllead complexes of hydroxide ion and of the sulfhydryl groups of 2-mercaptoethanol and glutathione. No evidence of amino group complexation by trimethyllead was found. The formation constants of the carboxylate complexes and of the various two-to-one metal-to-ligand complexes are small, while those of the sulfhydryl complexes of one-to-one stoichiometry are generally several orders of magnitude higher. The extent of complex formation is strongly pH dependent due to the competitive effects of ligand functional group protonation at neutral or low pH and (CHPbOH formation at high pH. This pH dependence is illustrated by calculations of the species distributions and the conditional formation constants of the various complexes as functions of pH. The trimethyllead chemical shifts of the sulfhydryl and carboxylate complexes are found further upfield and the formation constants increase as the pK a of the ligand functional group increases. To some extent, other factors such as steric and electrostatic effects also appear to influence these parameters.
Nuclear Magnetic Resonance of Metal Ion Complexes
Author: Thomas L. JamesPublisher:
ISBN:
Category :
Languages : en
Pages : 564
Book Description
Nuclear Magnetic Resonance Studies of Some Inorganic Molecules and Ions
Author: Richard Edwin PoulsonPublisher:
ISBN:
Category : Fluorides
Languages : en
Pages : 62
Book Description
Nuclear Magnetic Resonance, Infrared and Electronic Spectral Studies, and Dipole Moment Studies of Some [beta]-diketonate Complexes of Group IV Elements
![Nuclear Magnetic Resonance, Infrared and Electronic Spectral Studies, and Dipole Moment Studies of Some [beta]-diketonate Complexes of Group IV Elements PDF](https://books.google.com/books/content/images/frontcover/i4tZAAAAYAAJ?fife=w80-h100)
Author: Nick SerponePublisher:
ISBN:
Category : Dipole moments
Languages : en
Pages : 518
Book Description
Nuclear Magnetic Resonance Studies of Conformational and Configurational Analysis of Coordinated Ligands in Paramagnetic Nickel (II) Complexes in Aqueous Solution
Author: Floyd Fong-Lok HoPublisher:
ISBN:
Category : Coordination compounds
Languages : en
Pages : 260
Book Description
Nuclear Magnetic Resonance Studies of Conformational and Configurational Analysis of Coordinated Ligands in Paramagnetic Nickel(II) Complexes in Aqueous Solution
Author: Floyd F.-L. HoPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Oxygen-17 Nuclear Magnetic Resonance Studies of the First Hydration Sphere of Diamagnetic Metal Ions in Aqueous Solution
Author: James Watson NeelyPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
