Solid-State NMR Study of Paramagnetic Bis(alaninato-κ2N,O)copper(II) and Bis(1-amino(cyclo)alkane-1-carboxylato-κ2N,O)copper(II) Complexes: Reflection of Stereoisomerism and Molecular Mobility in 13C and 2H Fast Magic Angle Spinning Spectra

2015 ◽  
Vol 54 (10) ◽  
pp. 4663-4677 ◽  
Author(s):  
Gábor Szalontai ◽  
Róbert Csonka ◽  
Gábor Speier ◽  
József Kaizer ◽  
Jasmina Sabolović
2007 ◽  
Vol 40 (25) ◽  
pp. 9018-9025 ◽  
Author(s):  
Xiaoliang Wang ◽  
Qiang Gu ◽  
Qing Sun ◽  
Dongshan Zhou ◽  
Pingchuan Sun ◽  
...  

2011 ◽  
Vol 208 (1) ◽  
pp. 44-48 ◽  
Author(s):  
Yusuke Nishiyama ◽  
Yuki Endo ◽  
Takahiro Nemoto ◽  
Hiroaki Utsumi ◽  
Kazuo Yamauchi ◽  
...  

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Aleksander Jaworski ◽  
Jędrzej Piątek ◽  
Liuda Mereacre ◽  
Cordula Braun ◽  
Adam Slabon

Abstract We report the first magic-angle spinning (MAS) nuclear magnetic resonance (NMR) study on Sn(NCN). In this compound the spatially elongated (NCN)2− ion is assumed to develop two distinct forms: either cyanamide (N≡C–N2−) or carbodiimide (−N=C=N−). Our 14N MAS NMR results reveal that in Sn(NCN) the (NCN)2− groups exist exclusively in the form of symmetric carbodiimide ions with two equivalent nitrogen sites, which is in agreement with the X-ray diffraction data. The 14N quadrupolar coupling constant | C Q | $\vert {C}_{\text{Q}}\vert $  ≈ 1.1 MHz for the −N=C=N− ion in Sn(NCN) is low when compared to those observed in molecular compounds that comprise cyano-type N≡C– moieties ( | C Q | $\vert {C}_{\text{Q}}\vert $  > 3.5 MHz). This together with the information from 14N and 13C chemical shifts indicates that solid-state NMR is a powerful tool for providing atomic-level insights into anion species present in these compounds. The experimental NMR results are corroborated by high-level calculations with quantum chemistry methods.


2010 ◽  
Vol 203 (1) ◽  
pp. 113-128 ◽  
Author(s):  
Qiang Wang ◽  
Bingwen Hu ◽  
Olivier Lafon ◽  
Julien Trébosc ◽  
Feng Deng ◽  
...  

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