Nuclear Magnetic Resonance Studies of Transition Metal Complexes PDF Download
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Author: Michael Andrew Freeman
Publisher:
ISBN:
Category : Nuclear magnetic resonance
Languages : en
Pages : 388
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Author: Michael Andrew Freeman
Publisher:
ISBN:
Category : Nuclear magnetic resonance
Languages : en
Pages : 388
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Author: M. N. S. Hill
Publisher:
ISBN:
Category :
Languages : en
Pages : 382
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Author: P. S. Pregosin
Publisher: Elsevier Publishing Company
ISBN:
Category : Science
Languages : en
Pages : 372
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Book Description
Transition metal NMR spectroscopy has progressed enormously in recent years. New methods, and specifically solid-state methods and new pulse sequences, have allowed access to data from nuclei with relatively low receptivities with the result that chemists have begun to consider problems previously inaccessible. Moreover, theory, and computational science in particular, now permits the calculation of not just 13 C, 15 N and other light nuclei chemical shifts, but also heavy main-group elements and transition metals. This, combined with increasing access to high field pulsed spectrometers has produced a wealth of new data on NMR of transition metals. understanding and using the nuclear magnetic resonance spectra of the metals of Groups 3-12. The reader is provided with a view on how these nuclei are currently being approached, and what information can be obtained. The authors have liberally reproduced spectra as well as correlations relating metal-NMR data to different physical characteristics of their molecules.
Author: Kee-Lam Chua
Publisher:
ISBN:
Category :
Languages : en
Pages : 145
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Author: Wie-Hin Pan
Publisher:
ISBN:
Category :
Languages : en
Pages : 540
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Author: Joseph A. Kargol
Publisher:
ISBN:
Category : Nuclear magnetic resonance
Languages : en
Pages : 434
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Author: Martin Booth
Publisher:
ISBN:
Category :
Languages : en
Pages : 239
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Author: Matthew Daniel Olsen
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Paul S. Pregosin
Publisher: Springer Science & Business Media
ISBN: 3642488307
Category : Science
Languages : en
Pages : 164
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Book Description
For almost a quarter of a century the words "nuclear magnetic reso nance" were synonymous with proton I,leasurements. During this period the literature abounded with a seemingly infinite variety of 1H NHR studies concerned primarily with carbon chemistry. Occasionally a "novel" nucleus was studied and, even in those early days, the poten- 13 14 31 19 tial offered by C, N, P and F was clearly recognized. Despite the allure, the technical difficulties involved in measuring some of these nuclei were far from trivial. Small magnetic moments and low natural abundance in combination with spin-spin coupling from other nuclei, mostly protons, resulted in a signal-to-noise problem whose severity effectively excluded the study of metal complexes with unfa vorable solubility characteristics. The first important breakthrough came with the advent of broad band 1H-decoupling. For example, the featureless broad 31p resonance associated with the commonly used ligand triphenyl phosphine is converted to a sharp, more readily ob served singlet when wide-band decoupling is employed (see Fig. 1). Despite this improvement investigation of more interesting molecules, such as catalytically active complexes was forced to await the devel opment of Fourier Transform methods since only with relatively rapid signal averaging methods could sufficient signal-to-noise ratios be achieved.
Author: Karl-Erik Falk
Publisher:
ISBN:
Category :
Languages : en
Pages :
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