INTRAMOLECULAR HYDROGEN BONDS
Strong symmetrical intramolecular hydrogen bonds in diprotonated piperazinium bis(hydrogenmaleate)
... centered H atoms in the intramolecular hydrogen bonds, atoms O2, O4, O5 and O7 are both hydrogen donors and acceptors. The O2ÐC1, O4ÐC4, O5ÐC5 and O7ÐC8 distances are longer than those of ...
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Crystal structure and Hirshfeld surface analysis of 4 allyl 2 methoxy 6 nitrophenol
... exhibit intramolecular hydrogen bonds involving the nitro O atoms with the H atoms of the hydroxide group, and other intermolecular hydrogen bonds, in addition to – interactions, which ...
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N,N,N′,N′ Tetramethylstreptamine 2,4,6 orthoformate
... in intramolecular hydrogen bonds, and this might be expected to favour proton transfer catalysis when an in-flight proton can be stabilized by interactions with two (perhaps even all three) ...with ...
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Crystal structure of the acyclic form of 1 deoxy 1 [(4 methoxyphenyl)(methyl)amino] D fructose
... no hydrogen bonds involving N1 were detected in acyclic (I), FruNMpti or FruNEpca (Mossine et ...one hydrogen-mediated intramolecular heteroatom contact between the amino nitrogen atom and an ...
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Hexa μ2 bromido μ4 oxo tetrakis[(nicotine)copper(II)]
... five intramolecular and two intermolecular C—H···Br hydrogen bonds (Table ...The intramolecular hydrogen bonds determine (or support) the orientation of the nicotine molecules ...
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Intramolecular hydrogen bonding in dibenzyl 2,2′ (propane 1,3 diyldiimino)bis(cyclopent 1 ene 1 carbodithioate)
... intramolecular hydrogen bonds, N—H S and C—H S, described by the graph-set symbols S(6) and S(5), respectively. The structural parameters of the molecule suggest a partial electron delocalization ...
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Quinoline 2 sulfonamide
... different hydrogen-bond patterns in the solid ...primary hydrogen-bond connectivity is somewhat predictable. Two general hydrogen-bond rules based on empirical observations of hundreds of crystal ...
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meso 4,4′ Difluoro 2,2′ {[(3aR,7aS) 2,3,3a,4,5,6,7,7a octahydro 1H 1,3 benzimidazole 1,3 diyl]bis(methylene)}diphenol
... The molecular structure and atom-numbering scheme for ( I ) are shown in Fig. 1. In the molecular structure of the title compound, the two N atoms of the heterocyclic ring interact with the H atoms of the hydroxy groups ...
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trans Dichloridotetrakis[(dimethylphosphoryl)methanaminium κO]cobalt(II) tetrachloridocobaltate(II)
... center. Intramolecular hydrogen bonds between the aminium groups and the O atom of the phosphoryl groups and additional hydrogen bonds between the aminium groups and the chloride ...
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3 (4 Acetylphenyliminomethyl) 1,2 dihydroxybenzene
... strong intramolecular hydrogen bonds (O1ÐH1 N1 and O2ÐH2 O1), which give rise to two ®ve-membered ...analogous hydrogen bonds in N-(2-hydroxyphenyl)salicylaldimine ...
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1 [N (p Hydroxyphenyl)aminomethylidene]naphthalen 2(1H) one propan 1 ol hemisolvate
... of intramolecular hydrogen bonds (OÐH N and NÐH O) can exist in aldimine compounds derived from aromatic aldehydes having a hydroxyl group in an ortho position to the aldehyde group, and there is ...
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A tetrakis(secondary amide) derivative of norbornadiene: 7 isopropylidene N,N′,N′′,N′′′ tetraphenylnorborna 2,5 diene 2,3,5,6 tetracarboxamide
... The molecule of (I) (Fig. 1) possesses crystallographic twofold symmetry, with atoms C7 and C8 lying on the twofold axis. Molecular dimensions (Table 1) may be considered normal, e.g. the distorted bond angles of the ...
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4,4,4 Trifluoro 3 hydroxy 3 (trifluoromethyl)butanoic acid
... intermolecular hydrogen bonds can be observed between the carboxylic acid groups′ OH-groups and carbonylic ...the intramolecular hydrogen bonds is S(6)S(6) on the unitary level while ...
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2,4 Di(butylureido) 6 methyl s triazine
... by intramolecular hydrogen ...quadruply hydrogen-bonded dimer is, however, not observed in the crystalline state, because one of the intramolecular hydrogen bonds that stabilize ...
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Di μ acetato μ aqua bis[acetatobis(1H benzimidazole)cobalt(II)]
... O hydrogen bonds between the non- bridging acetate groups and the bridging water molecule, and intermolecular N—H O hydrogen bonds between the acetates and amine H atoms of the benzimidazoles ...
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6,6′ Dichloro 3,3′ (butane 1,4 diyldioxy)diflavone
... O hydrogen bonds and the crystal packing is stabilized by CÐH Cl intermolecular hydrogen bonds (Table ...The intramolecular C16ÐH16A O1 hydrogen bond is involved in R 1 1 (5) ...
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Disorder in methyl 4 (3,5 dimethoxy 2 methylphenoxy) 2,6 dihydroxy 3 iodo 5 methylbenzoate
... an intramolecular Smiles rearrangement (Elix et ...an intramolecular Smiles rearrangement of the prepared depsides have also been studied extensively (Elix & Jenie, 1989; Elix et ...
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(Z) 6 {2 [(E) 2,4 Dihydroxybenzylideneamino]phenylaminomethylene} 3 hydroxycyclohexa 2,4 dienone toluene solvate
... Schiff bases have received much attention because of their potential applications with some of these compounds exhibiting various pharmacological activities, as noted by their anticancer (Dao et al., 2000), anti-HIV ...
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(2E,5E) 2,5 Bis(4 hydroxy 3 methoxybenzylidene)cyclopentanone ethanol monosolvate
... via hydrogen bonds (Table ...bifurcated hydrogen bonds with intramolecular branches to adjacent methoxy O atoms (O3—H12···O5, O5—H20···O4) and intermolecular branches to either a ...
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Methyl N [(2 hydroxynaphthalen 1 yl)(phenyl)methyl]carbamate
... O hydrogen bonds (Table 1) link the molecules, to form infinite chains along the c ...and intramolecular N—H O hydrogen bonds seem to be effective in the stabilization of the crystal ...
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