Structural Characterization of Frustrated Lewis Pairs and Their Reaction Products Using Modern Solid-State NMR Spectroscopy Techniques

2015 ◽  
Vol 55 (2) ◽  
pp. 150-178 ◽  
Author(s):  
Thomas Wiegand ◽  
Melanie Siedow ◽  
Hellmut Eckert ◽  
Gerald Kehr ◽  
Gerhard Erker
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Structural Characterization ◽  
Solid State Nmr ◽  
Reaction Products ◽  
Frustrated Lewis Pairs ◽  
Solid State Nmr Spectroscopy ◽  
Lewis Pairs

scholarly journals Solid-State NMR Techniques for the Structural Characterization of Cyclic Aggregates Based on Borane–Phosphane Frustrated Lewis Pairs

Molecules ◽  
2020 ◽  
Vol 25 (6) ◽  
pp. 1400 ◽  
Author(s):  
Robert Knitsch ◽  
Melanie Brinkkötter ◽  
Thomas Wiegand ◽  
Gerald Kehr ◽  
Gerhard Erker ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Characterization ◽  
Solid State Nmr ◽  
Magic Angle ◽  
Frustrated Lewis Pairs ◽  
Wide Range ◽  
Nmr Techniques ◽  
Nmr Methods ◽  
Lewis Pairs

Modern solid-state NMR techniques offer a wide range of opportunities for the structural characterization of frustrated Lewis pairs (FLPs), their aggregates, and the products of cooperative addition reactions at their two Lewis centers. This information is extremely valuable for materials that elude structural characterization by X-ray diffraction because of their nanocrystalline or amorphous character, (pseudo-)polymorphism, or other types of disordering phenomena inherent in the solid state. Aside from simple chemical shift measurements using single-pulse or cross-polarization/magic-angle spinning NMR detection techniques, the availability of advanced multidimensional and double-resonance NMR methods greatly deepened the informational content of these experiments. In particular, methods quantifying the magnetic dipole–dipole interaction strengths and indirect spin–spin interactions prove useful for the measurement of intermolecular association, connectivity, assessment of FLP–ligand distributions, and the stereochemistry of adducts. The present review illustrates several important solid-state NMR methods with some insightful applications to open questions in FLP chemistry, with a particular focus on supramolecular associates.

scholarly journals Structural Characterization of Polyglutamine Fibrils by Solid-State NMR Spectroscopy

2011 ◽  
Vol 412 (1) ◽  
pp. 121-136 ◽  
Author(s):  
Robert Schneider ◽  
Miria C. Schumacher ◽  
Henrik Mueller ◽  
Deepak Nand ◽  
Volker Klaukien ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Structural Characterization ◽  
Solid State Nmr ◽  
Solid State Nmr Spectroscopy

Structural characterization of monomeric and oligomeric arylamides by solution and solid-state NMR spectroscopy

2002 ◽  
Vol 40 (3) ◽  
pp. 219-224
Author(s):  
Stefano Cavallaro ◽  
Giampietro Cum ◽  
Raffaele Gallo ◽  
Agatino Spadaro ◽  
Giuseppe Visalli
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Structural Characterization ◽  
Solid State Nmr ◽  
Solid State Nmr Spectroscopy
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