Infrared spectra of weak hydrogen bonds and indirect damping. On the deep connection between the quantum model and the semi-classical one of Robertson and Yarwood

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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Raman spectroscopy of weak hydrogen bonds in the liquid phase

Journal of Molecular Structure ◽

10.1016/0022-2860(78)87192-0 ◽

1978 ◽

Vol 47 ◽

pp. 285-290 ◽

Cited By ~ 7

Author(s):

J.P. Perchard ◽

C. Perchard ◽

A. Burneau ◽

J. Limouzi

Keyword(s):

Raman Spectroscopy ◽

Liquid Phase ◽

Hydrogen Bonds ◽

Weak Hydrogen Bonds

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Infrared spectra of potassium and caesium bifluorides, of cobaltic acid, and of their deuterium-substituted analogues; band-width phenomena from crystals incorporating ions with very strong hydrogen bonds

Spectrochimica Acta Part A Molecular Spectroscopy ◽

10.1016/0584-8539(76)80275-9 ◽

1976 ◽

Vol 32 (5) ◽

pp. 923-930 ◽

Cited By ~ 12

Author(s):

A.S. Gilbert ◽

N. Sheppard

Keyword(s):

Hydrogen Bonds ◽

Infrared Spectra ◽

Band Width

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Synthetic and crystallographic studies of bicyclo[3.3.1]nonane derivatives: from strong to weak hydrogen bonds and the stereochemistry of network formation

CrystEngComm ◽

10.1039/c1ce05673e ◽

2012 ◽

Vol 14 (1) ◽

pp. 178-187 ◽

Cited By ~ 7

Author(s):

Carl-Johan Wallentin ◽

Edvinas Orentas ◽

Magnus T. Johnson ◽

Nikoletta B. Báthori ◽

Eugenijus Butkus ◽

...

Keyword(s):

Hydrogen Bonds ◽

Network Formation ◽

Weak Hydrogen Bonds

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Weak Hydrogen Bonds in Some Six- and Five-atom Interactions: An AIM Topological Analysis

American Journal of Chemistry ◽

10.5923/j.chemistry.20120206.08 ◽

2013 ◽

Vol 2 (6) ◽

pp. 343-346 ◽

Cited By ~ 6

Author(s):

Francisco Sánchez-Viesca ◽

Fernando Cortés ◽

Reina Gómez ◽

Martha Berros

Keyword(s):

Hydrogen Bonds ◽

Topological Analysis ◽

Weak Hydrogen Bonds

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INFRARED SPECTRA OF THIOSACCHARINATES OF CADMIUM AND LEAD COMPARISON WITH THE ANALOGOUS METAL SACCHARINATES

Contributions Section of Natural Mathematical and Biotechnical Sciences ◽

10.20903/csnmbs.masa.2006.27.1-2.10 ◽

2017 ◽

Vol 27 (1-2) ◽

Author(s):

Gligor Jovanovski ◽

Adnan Kahil ◽

Orhideja Grupče

Keyword(s):

Infrared Spectra ◽

Room Temperature ◽

Spectral Characteristics ◽

Crystalline Hydrate ◽

Water Molecules ◽

X Ray ◽

Weak Hydrogen Bonds ◽

Deuterated Analogue ◽

The Fourier Transform ◽

Cadmium And Lead

A b s t r a c t: The Fourier transform (FT) infrared spectra of thiosaccharinates of cadmium and lead in the 4000–400 cm–1 region were studied. Although the observed resemblance between the spectra recorded in KBr pellets suggests a possible similarity between their structures as well, the powder X-ray diagrams show that these two compounds are not isomorphous. The presence of broad and intense bands in the region of the HOH stretchings shows that thiosaccharinate of cadmium is a crystalline hydrate and the spectral picture in the region of the O-D stretchings of the isotopically isolated HOD molecules in the partially deuterated analogue indicates that present in its structure are at least two types of crystallographically different water molecules involved in the formation of weak hydrogen bonds. The room temperature (RT) spectrum of lead thiosaccharinate in the region of the ν(HOH) modes differs significantly from the spectrum recorded at the boiling temperature of liquid nitrogen (LNT), which may perhaps be interpreted as an indication that a phase transition is taking place on lowering the temperature. The spectrum of lead thiosaccharinate was recorded in a Nujol mull as well. While the KBr and Nujol spectra are essentially identical in the region below 1600 cm–1, no bands are observed in the HOH stretching region of the mull spectra. In fact, it was shown that the appearance of the spectra of lead thiosaccharinates depends on the emulsion preparation rate. A comparison of the spectral characteristics of the thiosaccharinates of cadmium and lead with those of the corresponding saccharinates (their crystal structures are known) was made, special attention being paid to the analysis of the SO2 stretching region in the saccharinate and thiosaccharinate compounds.

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catena-Poly[[[bis(acetonitrile-κN)(4,4′-dimethoxy-2,2′-bipyridine-κ2 N,N′)copper(II)]-μ-trifluoromethanesulfonato-κ2 O:O′] trifluoromethanesulfonate]

IUCrData ◽

10.1107/s2414314620014078 ◽

2020 ◽

Vol 5 (10) ◽

Author(s):

Rafael A. Adrian ◽

Diego R. Hernandez ◽

Hadi D. Arman

Keyword(s):

Hydrogen Bonds ◽

Title Compound ◽

Metal Organic Frameworks ◽

Starting Material ◽

Compound A ◽

Distorted Octahedral ◽

Weak Hydrogen Bonds ◽

Polymeric Chains ◽

Metal Organic ◽

Bipyridine Ligand

The central copper(II) atom of the title salt, {[Cu(CF3SO3)(CH3CN)2(C12H12N2O2)](CF3SO3)} n or [[Cu(CH3CN)2(diOMe-bpy)(CF3SO3)](CF3SO3)] n where diOMe-bpy is 4,4′-dimethoxy-2,2′-bipyridine, C12H12N2O2, is sixfold coordinated by the N atoms of the chelating bipyridine ligand, the N atoms of two acetonitrile molecules, and two trifluoromethanesulfonate O atoms in a tetragonally distorted octahedral shape. The formation of polymeric chains [Cu(CH3CN)2(diOMe-bpy)(CF3SO3)]+ n leaves voids for the non-coordinating trifluoromethanesulfonate anions that interact with the complex through weak hydrogen bonds. The presence of weakly coordinating ligands like acetonitrile and trifluoromethanesulfonate makes the title compound a convenient starting material for the synthesis of novel metal–organic frameworks.

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