scholarly journals Guanidinium Cation

2020 ◽  
Author(s):  
Keyword(s):  
2004 ◽  
Vol 59 (11) ◽  
pp. 787-790
Author(s):  
P. Bilski ◽  
M. Olszewskia ◽  
N. A. Sergeev ◽  
J. Wa̻sicki

The NMR solid-echo polycrystalline tris-guanidinium nonachlorodiantimonate (III) has been studied in a wide temperature range. The temperature dependences of a time position and an amplitude of solid-echo are characterized by minima at ca. 143 K and 273 K, which are assigned to the reorientation of two dynamically inequivalent guanidinium cations [C(NH2)3]+. The motional parameters of the two types of guanidinium cations have been determined. -PACS: 64.70K; 76.60.E


Biochemistry ◽  
2010 ◽  
Vol 49 (5) ◽  
pp. 824-826 ◽  
Author(s):  
Shonoi A. Barnett ◽  
Tina L. Amyes ◽  
B. McKay Wood ◽  
John A. Gerlt ◽  
John P. Richard

2017 ◽  
Vol 19 (15) ◽  
pp. 9724-9728 ◽  
Author(s):  
V. Balos ◽  
M. Bonn ◽  
J. Hunger

The interaction of spherical anions and cations with a model amide is additive, except for salts containing the guanidinium cation.


1995 ◽  
Vol 50 (8) ◽  
pp. 742-748 ◽  
Author(s):  
M. Grottel ◽  
A. Kozak ◽  
Z. Pająk

Abstract Proton and fluorine NMR linewidths, second moments, and spin-lattice relaxation times of polycrystalline [C(NH2)3]2SbF5 and C(NH2)3SbF6 were studied in a wide temperature range. For the pentafluoroantimonate, C3-reorientation of the guanidinium cation and C4-reorientation of the SbF5 anion were revealed and their activation parameters determined. The dynamical inequivalence of the two guanidinium cations was evidenced. For the hexafluoroantimonate, two solid-solid phase transitions were found. In the low temperature phase the guanidinium cation undergoes C3 reorien­ tation while the SbF6 anion reorients isotropically. The respective activation parameters were derived. At high temperatures new ionic plastic phases were evidenced.


2020 ◽  
Vol 32 (9) ◽  
pp. 4024-4037
Author(s):  
Susana Ramos-Terrón ◽  
Alexander D. Jodlowski ◽  
Cristóbal Verdugo-Escamilla ◽  
Luis Camacho ◽  
Gustavo de Miguel

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