INTRAMOLECULAR C-H...O INTERACTIONS
Crystal structures of two new isocoumarin derivatives: 8 amino 6 methyl 3,4 diphenyl 1H isochromen 1 one and 8 amino 3,4 diethyl 6 methyl 1H isochromen 1 one
... an intramolecular N—H O hydrogen bond present forming an S(6) ring ...N—H interactions, forming chains along the b-axis direction. A C—H interaction links the chains to ...
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2,4 Dichlorophenyl 4 toluenesulfonate: supramolecular aggregation through C—H⋯O, C—H⋯Cl, C—H⋯π and π⋯π interactions
... an intramolecular CÐH interaction (Table 2). The geometry of the CÐ H interaction was obtained from PLATON (Spek, 1998); Cg2 is the centroid of the 2,4-dichlorophenyl ...by interactions, with ...
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Enrofloxacinium oxalate
... single O—H···O intramolecular hydrogen bond is ...weak C —H···O intermolecular interactions forming R 2 2 (8) graph set ring motifs ...weak C—H···F ...
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Crystal structure of 2 [4 (4 chlorophenyl) 1 (4 methoxyphenyl) 2 oxoazetidin 3 yl]benzo[de]isoquinoline 1,3 dione dimethyl sulfoxide monosolvate
... An intramolecular C—H O hydrogen bond closes an S(6) ring and helps to establish the near coplanarity of the -lactam and methoxybenzene ...by C—H O hydrogen bonds, ...
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1 (3 Mesityl 3 methylcyclobutyl) 2 (piperidin 1 yl)ethanone
... weak intramolecular C9—H9B O1 hydrogen bond (Table 2) results in the formation of a five-membered ring, which is fused with the cyclobutane ring ...intermolecular C—H O interactions are ...
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Crystal structure of ethyl (2Z) 2 cyano 3 [(3 methyl 1 phenyl 1H pyrazol 5 yl)amino]prop 2 enoate
... by intramolecular N3—H3a···O1 and N7—H7a···O3 hydrogen bonds (Table 2 and ...while C—H···O and C—H···N interactions direct the packing into a layer structure ...
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2 Naphthyl 4 toluenesulfonate: supramolecular aggregation through C—H⋯O and C—H⋯π interactions
... weak C—H···O interactions. The range of H···O distances (Table 2) agrees with that found for weak C—H···O bonds (Desiraju & Steiner, ...C26—H26···O5 ...
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3 Carboxypyridine N oxide: supramolecular aggregation through O—H⋯O and C—H⋯O interactions
... OÐH O and weak CÐH O hydrogen bonds makes them useful in crystal design for the preparation of molecular materials with controlled physical properties (Desiraju, 1995; Desiraju & Steiner, ...strong ...
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4 Methylphenyl 4 toluenesulfonate: supramolecular aggregation through weak C—H⋯O and C—H⋯π interactions
... All H atoms were included in calculated positions, with aromatic CÐH distances of 0.93 AÊ and methyl CÐH distances of 0.96 AÊ, and re®ned as riding. Displacement parameters were re®ned for the aromatic and methyl ...
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Methyl 4 tosyloxybenzoate: supramolecular aggregation through C—H⋯O, C—H⋯π and π–π interactions
... A search of version 5.23 (July 2002 updates) of the Cambridge Structural Database (Allen, 2002) revealed 16 structures (with the following refcodes: KAWDAN, FIXCAQ, NEDXUP, NEDYAW, NEDYIE, NUNCII, RASSOT, RELVUZ, SIMVUF, ...
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1 Napthyl 4 toluenesulfonate: supramolecular aggregation through weak C—H⋯O and C—H⋯π interactions
... S O bond lengths (Table 1) are comparable with those found in related structures (Vembu, Nallu, Garrison & Youngs, 2003a, b,c, d, e, f; Vembu, Nallu, Spencer & Howard, 2003a, b, c, d, e, f, ...
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Crystal structure of 8 [7,8 bis(4 chlorobenzoyl) 7H cyclopenta[a]acenaphthylen 9 yl]naphthalene 1 carboxylic acid
... A mixture of acenaphthenequinone (1) (4.6 g, 25 mmol), 4-chloroacetophenone (2) (4.2 g, 27 mmol) and powdered potassium hydroxide (1.0 g) in methanol (30 ml) was stirred around 333 K for 4 h and later kept in a ...
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Ethyl 4 chloro 2 [(4 nitrophenyl)hydrazono] 3 oxobutyrate
... The packing is further stabilized by C—H and – interactions. There is a C—H interaction between the ethyl group and the aromatic ring. For the C12–H12B contact, the distance between ...
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4 Methoxyphenyl 4 toluenesulfonate: supramolecular aggregation through C—H⋯O and C—H⋯π interactions
... the H atoms were located in the difference Fourier map and their positional coordinates and isotropic displacement paramaters were ...The C—H bond lengths are in the range 0.89 (3)–0.99 (3) Å, the ...
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6 (2 Hydroxybenzoyl) 2 (4 methylphenyl) 5 methyl 7 phenylpyrazolo[1,5 a]pyrimidine: complex sheets built from C—H⋯N and C—H⋯O hydrogen bonds
... The bond distances in the pyrazolo[1,5-a]pyrimidine frag- ment (Table 1) are typical of this ring system (Portilla et al., 2005, 2006) and they are consistent with 10- electron delo- calization reminiscent of the ...
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Triphenyl(benzoylmethyl)phosphonium hexabromodicadmate(II): supramolecular aggregation through extensive C—H⋯Br and C—H⋯O interactions
... The dimeric structure is stabilized mainly by two types of secondary interactions, viz. a C1—H1···O1 interaction and a C1—H2···Br1 interaction (Table 2). The former, which links the cations along the b axis (Fig. ...
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Redetermination of 8 tosyloxyquinoline at 100 K: supramolecular aggregation through weak C–H⋯O and C–H⋯N interactions
... CÐH O and CÐH N interactions. The range of H O distances (Table 2) found in (I) agrees with those found for weak CÐ H O bonds (Desiraju & Steiner, ...O1 interactions ...
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Crystal structure of (2 amino 7 methyl 4 oxidopteridine 6 carboxylato κ3O4,N5,O6)aqua(1,10 phenanthroline κ2N,N′)copper(II) trihydrate
... 3. H atoms attached to N and O atoms were located in a difference Fourier map and refined with distance constraints of N—H = ...and O—H = 0.82 (1) A ˚ . H atoms attached to ...
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3 Nitrobenzenesulfonyl chloride: molecular aggregation through C—H⋯O interactions
... weak C—H···O interactions. The range of H···O distances (Table 2) found in (I) agrees with those found for weak C—H···O bonds (Desiraju & Steiner, ...1) ...
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Syntheses and crystal structures of 2 methyl 1,1,2,3,3 pentaphenyl 2 silapropane and 2 methyl 1,1,3,3 tetraphenyl 2 silapropan 2 ol
... and finally brine (10 ml). The hexanes solution was dried over sodium sulfate, filtered and concentrated in vacuo. The product was purified by dissolving it in 20 ml hexane, cooling to 195 K and isolating the white ...
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