Low-Temperature NMR Studies of the Structure and Dynamics of a Novel Series of Acid−Base Complexes of HF with Collidine Exhibiting Scalar Couplings Across Hydrogen Bonds†

2003 ◽  
Vol 125 (38) ◽  
pp. 11710-11720 ◽  
Author(s):  
Ilja G. Shenderovich ◽  
Peter M. Tolstoy ◽  
Nikolai S. Golubev ◽  
Sergei N. Smirnov ◽  
Gleb S. Denisov ◽  
...  
1983 ◽  
Vol 96 (1) ◽  
pp. 305-317 ◽  
Author(s):  
Costantino S. Yannoni ◽  
Thomas C. Clarke ◽  
Raymond D. Kendrick ◽  
Volker Macho ◽  
Robert D. Miller ◽  
...  

2007 ◽  
Vol 129 (18) ◽  
pp. 5898-5903 ◽  
Author(s):  
Hans-Jürgen Sass ◽  
Franziska Fang-Fang Schmid ◽  
Stephan Grzesiek

Traffic ◽  
2005 ◽  
Vol 6 (1) ◽  
pp. 32-44 ◽  
Author(s):  
Emma Martinez-Alonso ◽  
Gustavo Egea ◽  
Jose Ballesta ◽  
Jose A. Martinez-Menarguez

2000 ◽  
Vol 122 (38) ◽  
pp. 9289-9295 ◽  
Author(s):  
Frank Löhr ◽  
Stephen G. Mayhew ◽  
Heinz Rüterjans

1980 ◽  
Vol 58 (9) ◽  
pp. 867-874 ◽  
Author(s):  
Osvald Knop ◽  
Wolfgang J. Westerhaus ◽  
Michael Falk

Available evidence suggests that (1) the stretching frequencies of highly-bent hydrogen bonds decrease with increasing temperature, regardless of whether the bonds are static or dynamic in character, to a single acceptor or to several competing acceptors; and (2) departures from symmetric trifurcation (or bifurcation) toward asymmetric situations lower the stretching frequency. In further support of these criteria isotopic probe ion spectra between 10 K and room temperature have been obtained for taurine and for trigonal (NH4)2MF6 (M = Si, Ge, Sn, Ti). Evidence of a low-temperature transition at 100(10) K in trigonal (NH4)2SnF6 is presented, and existence of the previously reported transition at 38.6 K in trigonal (NH4)2SiF6 is confirmed. Symmetry changes associated with these transitions are discussed.


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