Name: van der waals forces and shielding effects (en Inglés)
Price: 146.41 EUR
Availability: InStock
Author: Rummens, Frans H. a.
ISBN: 9783642661785

portada van der waals forces and shielding effects (en Inglés)

Formato

Libro Físico

Autor

Frans H. a. Rummens

Editorial

Springer

Año

2012

Idioma

Inglés

N° páginas

122

Encuadernación

Tapa Blanda

Dimensiones

24.4 x 17.0 x 0.7 cm

Peso

0.22 kg.

ISBN

3642661785

ISBN13

9783642661785

Categorías

Física atómica y molecular
Física nuclear
Química física

van der waals forces and shielding effects (en Inglés)

Frans H. a. Rummens (Autor) · Springer · Tapa Blanda

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Origen: Estados Unidos (Costos de importación incluídos en el precio)

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Reseña del libro "van der waals forces and shielding effects (en Inglés)"

The usefulness of solvent effect studies on NMR chemical shifts need not be elabo- rated here; many applications of solvent effects continue to be published in great profusion. Quite a few intermolecular phenomenae may contribute to solvent shifts, but there is always the ubiquitous Van der Waals effect ow. Contrary to such other effects as neighbour anisotropy 0a, reaction field contribution 0E or complexation effects 0e, no major direct use has yet been found for the Van der Waals effect. So far the role of the Van der Waals effect has been that of a nasty, disturbing phenom- enon, something to be eliminated at all costs. But it is precisely in this latter respect where almost all solvent effect studies fall short. Not only is Ow usually large (larger than 0a and 0E even in 1 H NMR and probably the dominating term with heavier nuclei), but it is strongly variable from one solute to another and even from one nu- clear site to another in the same solute molecule. No referencing technique, however cleverly devised, will be capable of eliminating the Ow contribution from the other, presumedly more interesting contributions. It appeared quite recently that mathematical trickery by the name of "factor analysis" could achieve the sought-for separation of contribuants.