Cation-π Interactions Between Alkali Metal Cations and Neutral Double Bonds

2004 ◽  
Vol 69 (5) ◽  
pp. 1050-1062 ◽  
Author(s):  
Jiaxin Hu ◽  
Leonard J. Barbour ◽  
George W. Gokel

Two-armed lariat ethers having double bonds present in their side arms form stable complexes with sodium and potassium cations. When the double bonds are positioned appropriately, cation-π interactions are observed between the neutral double bonds and the macroring- bound cation as demonstrated by X-ray crystallography.

2011 ◽  
Vol 396-398 ◽  
pp. 2338-2341
Author(s):  
Xing Chuan Wei ◽  
Zhi Li Liu ◽  
Kun Zhang ◽  
Zhi Yun Du ◽  
Xi Zheng

In this paper, (2E,6E)-2,6-Bis(2,3,4-tri-methoxy -benzylidene)cyclohexanone (omitted as tmbcho) (1) was obtained by the reaction of acetic acid, tetrahydrofuran, cyclohexanone and 2,3,4-tri-methoxy-benzaldehyde. Three non-classic hydrogen bonds were observed in the compound. X-ray crystallography shows that the crystal structure is stabilized by intermolecular C-H•••π interactions and it contains plenty of conjugated double bonds. The title compound was characterized by UV-vis and fluorescent spectral studies.


1997 ◽  
pp. 1499-1500 ◽  
Author(s):  
Vincent J. Huber ◽  
Sheryl N. Ivy ◽  
Jianping Lu ◽  
Richard A. Bartsch

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