HYDROGEN BONDS
Characterising organic hydrogen bonds
... the hydrogen bond, this time in the frame of molecular orbital theory, at the Hartree-Fock ...small hydrogen bonded systems led them to a conclusion in line with Coulson’s ideas, ...strong hydrogen ...
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2,2′ Dipropylmalonic acid: intermolecular association via strong O—H⋯O hydrogen bonds
... N hydrogen bonds (Desiraju, 2002). Quite often, hydrogen- bonded patterns are formed which are interesting in supra- molecular design and crystal ...of hydrogen bonds were ®rst analysed ...
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Microscopic mechanism of electron transfer through the hydrogen bonds between carboxylated alkanethiol molecules connected to gold electrodes
... of hydrogen bonds formed between two carboxylated alkanethiol molecules connected to gold electrodes by means of the NEGF+DFT ...Au–S bonds localized at the molecule-electrode ...
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Peptoids with aliphatic sidechains as helical structures without hydrogen bonds and collagen/ inverse collagen type structures
... out hydrogen bonds takes place at the sub picoseconds time ...of hydrogen bonds formed be- tween water molecules and the carbonyl moieties attain the maximum val ues within 10 ps and ...
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The discovery of hydrogen bonds in DNA and a re evaluation of the 1948 Creeth two chain model for its structure
... of hydrogen bonds in DNA by scientists at the University of Nottingham and part of the meeting held on 10 November 2017 to commemorate this [2], we review the experiments undertaken on highly purified ...
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4,4′ Dithiodiphenol: a chain of rings generated by two pairs of O—H⋯O hydrogen bonds
... The hydroxy groups in the title compound form OÐH O hydrogen bonds which link molecules head-to-tail, forming one-dimensional chains. In addition, adjacent one-dimen- sional chains are linked together ...
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Two dimensional network of C–H⋯Cl–Co hydrogen bonds in the structure of 1,1,4,4 tetraisopropylpiperazinium tetrachlorocobaltate(II)
... Cl hydrogen bonds has been recently reviewed by AakeroÈy et ...better hydrogen-bond acceptors than neutral chlorine-containing molecules; however, no attention has been given to Cl(ÐM) groups as ...
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Short N⋯O hydrogen bonds in the 1:1 adduct of 4,4′ bipyridyl and oxalic acid
... The structures of segments of both independent chain, with the atom- numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. Dashed lines indicate hydrogen bonds and H atoms are ...
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3 Aminopyridinium 2,4 dihydroxybenzoate: a three dimensional supramolecular adduct assembled via hydrogen bonds
... addition, the 2,4-dihydroxybenzoate anion shows an intra- molecular O—H O hydrogen bond, forming an S(6) ring (Figs. 1 and 2; Table 1, entry 3). Adjacent chains are further organized into a three-dimensional ...
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A β sheet structure formed by C–H⋯O hydrogen bonds between the thiazole rings and amide bonds of a dimeric desoxazoline ascidiacyclamide analogue
... The conformational properties which were found in the folded and squared structures of ASC and dASC analogues are not found in the structure of [D-aThr,Thr]-dASC2. The molecule is relatively flat, with accompanying ...
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Change in Energy of Hydrogen Bonds upon Excitation of Coumarin 1: TDDFT/EFP1 Method
... form hydrogen bonds with protic solvent molecules, influence the absorption and/or emission spectra as well as their structure and photophysical properties 21–23 ...
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Hydrogen bonds and π–π interactions in two new crystalline phases of methylene blue
... both hydrogen bonds and stacking can be found in the solid phase, the two interactions compete to maximize their ...i.e. hydrogen bonds (Gospodinova & Tomsˇı´k, ...strong hydrogen ...
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2 Ethyl 2 (hydroxymethyl) 1,3 propanediol at 120 K: three hydrogen bonds generate a three dimensional structure
... temperature, 120 (2) K, study of the monoclinic phase of (II), as grown directly from solution rather than obtained indirectly from the melt, and we give a detailed analysis of the hydrogen bonding. Although there ...
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Coordination polymer chains built from CuII and adipate ions linked by hydrogen bonds to form a three dimensional framework structure
... bipyridine and 1,1,3,3-tetracyano-2-ethoxypropenide compo- nents are pendent, and where each adipate dianion is bonded to four different Cu II centres. The coordination polymer chains are linked into a three-dimensional ...
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Supramolecular self assembly via inter ligands hydrogen bonds in [Cu(H2O)2(NO3)2(tb)] (tb is thiabendazole)
... inter-ligand hydrogen bonds involve the water mol- ecules, nitrate ions and the NH group of the thiabendazole ...a hydrogen-bonded dimeric unit, as shown in Fig. 2. A hydrogen-bonded dimer ...
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(E) 3 (4 Chlorophenyl) 2 (2 thienyl)acrylonitrile: chains built from C—H⋯N hydrogen bonds
... The molecules are linked by a single C—H N hydrogen bond (Table 2) into C(5) (Bernstein et al., 1995) chains generated by the n-glide planes and running parallel to the [101] direction (Fig. 2). Two such chains, ...
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Theoretical model of infrared spectra of hydrogen bonds in molecular crystals of 2-thiopheneacetic acid: Fermi resonance and Davdov coupling effects.
... centrosymmetric hydrogen-bonded dimers in each unit cell, linked by ...termolecular hydrogen bond vibrations, described by Maréchal and Witkowski [8], is an important mechanism for shaping the fine ...
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One dimensional P–OH⋯O=P hydrogen bonds restricted by the bulky molecule 2,6 diisopropylphenyl dihydrogen phosphate
... reported hydrogen-bond networks in the dihydrogen phosphate or phosphonate state are characterized by single P—OH···O═P hydrogen bonds (Weakly, 1976; Calvo & Berg, 1984; Tkachev et ...OH···O═P ...
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N (4 Ethoxyphenyl) 2 [(4 ethoxyphenylcarbamoyl)methoxy]acetamide monohydrate, a supramolecular chain structure formed by hydrogen bonds
... by hydrogen bonding between cyanuric acid and ...work, hydrogen bonds between water and the O atoms of C 20 H 24 N 2 O 5 were used to form a novel supramolecular ...
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Hydrogen bonds and van der Waals forces as tools for the construction of a herringbone pattern in the crystal structure of hexane 1,6 diaminium hexane 1,6 diyl bis(hydrogen phosphonate)
... O hydrogen bonds (Steiner, 2002; Table 2). The hydrogen-bonding inter- actions help to construct a two-dimensional network which propagates parallel to the ac plane ...twelve-membered ...
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