scholarly journals Pseudoaglycone of Spinosyn A

2012 ◽  
Vol 68 (8) ◽  
pp. o2488-o2488 ◽  
Author(s):  
Hongxin Chai ◽  
Mingxing Liu ◽  
Qi Zhang ◽  
Daxin Shi ◽  
Jiarong Li
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Hydrolysis Of ◽  
Cyclopentene Ring

The title compound [systematic name: 9-ethyl-13-hydroxy-14-methyl-2-(3,4,5-trimethoxy-6-methyltetrahydro-2H-pyran-2-yloxy)-3,3a,5b,6,9,10,11,12,13,14,16a,16b-dodecahydro-1H-as-indaceno[3,2-d][1]oxacyclododecine-7,15(2H,5aH)-dione], C33H50O9, was obtained by hydrolysis of Spinosyn A. The fused cyclopentene ring adopts a twisted conformation, while the fused cyclohexene and cyclopentane rings are in envelope conformations with the same C atom at the flaps. In the crystal, molecules are linked by O—H...O and C—H...O hydrogen bonds into a layer parallel to theabplane.

scholarly journals 2,4-Dibromo-2,3-dihydro-1H-inden-1-yl acetate

2012 ◽  
Vol 68 (6) ◽  
pp. o1884-o1884 ◽  
Author(s):  
Ísmail Çelik ◽  
Mehmet Akkurt ◽  
Makbule Yilmaz ◽  
Ahmet Tutar ◽  
Ramazan Erenler ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Van Der Waals ◽  
Van Der Waals Forces ◽  
Stacking Interactions ◽  
Compound C ◽  
Centroid Distance ◽  
Cyclopentene Ring

In the title compound, C11H10Br2O2, the cyclopentene ring fused to the benzene ring adopts an envelope conformation, with the C atom attached to the Br atom as the flap. The crystal structure does not exhibit any classical hydrogen bonds. The molecular packing is stabilized by van der Waals forces and π–π stacking interactions with a centroid–centroid distance of 3.811 (4) Å.

Ammonium 4-chloropyridine-3-sulfonate

2006 ◽  
Vol 62 (4) ◽  
pp. o1488-o1489
Author(s):  
Tie-Han Li ◽  
Xin-Biao Mao ◽  
Qing-Bao Song ◽  
Chun-An Ma
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Dimensional Network ◽  
Hydrolysis Of

The title compound, NH4 +·C5H3ClNO3S−, was prepared by the hydrolysis of 4-chloropyridine-3-sulfonamide. In the crystal structure, a three-dimensional network is formed via N—H...O [H...O = 1.97 (3)–2.41 (2) Å] and N—H...N [H...N = 2.13 (3) Å] hydrogen bonds.

scholarly journals Crystal structure of 4-amino-1-benzyl-1,2,4-triazolin-5-one

2014 ◽  
Vol 70 (10) ◽  
pp. o1083-o1084
Author(s):  
Gerhard Laus ◽  
Volker Kahlenberg ◽  
Herwig Schottenberger
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Sodium Azide ◽  
Title Compound ◽  
Carbonyl Groups ◽  
Compound C ◽  
Hydrolysis Of

The title compound, C9H10N4O, was obtained unintentionally by hydrolysis of 4-amino-1-benzyl-5-methylsulfanyl-1,2,4-triazolium tetrafluoroborate in the presence of sodium azide. In the crystal, alternating layers of polar aminotriazolinone and apolar benzene moieties are observed. N—H...O hydrogen bonds between the amino and carbonyl groups form infinite chains along [010]. These infinite chains are linked by additional C—H...O contacts.

scholarly journals 2-(5-Fluoro-3-isopropylsulfanyl-7-methyl-1-benzofuran-2-yl)acetic acid

2012 ◽  
Vol 68 (4) ◽  
pp. o946-o946
Author(s):  
Hong Dae Choi ◽  
Pil Ja Seo ◽  
Uk Lee
Keyword(s):  
Acetic Acid ◽  
Hydrogen Bonds ◽  
Alkaline Hydrolysis ◽  
Title Compound ◽  
Compound C ◽  
Hydrolysis Of

The title compound, C14H15FO3S, was prepared by alkaline hydrolysis of ethyl 2-(5-fluoro-3-isopropylsulfanyl-7-methyl-1-benzofuran-2-yl)acetate. In the crystal, molecules are linkedviapairs of O—H...O hydrogen bonds, forming inversion dimers. These dimers are connected by weak C—H...O hydrogen bonds.

Darstellung, Eigenschaften und Kristallstruktur der N-[2-(4.5.6.7-Tetrahydro-2-benzimidazolyl)-ethyl] -phthalamidsäure / Preparation, Properties and Crystal Structure of N-[2-(4.5.6.7-Tetrahydro-2-benzimidazolyl)-ethyl]-phthalamic Acid

1983 ◽  
Vol 38 (10) ◽  
pp. 1203-1207 ◽  
Author(s):  
Sigurd Elz ◽  
Armin Buschauer ◽  
Martin Dräger ◽  
Walter Schunack
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Aqueous Ammonia ◽  
Condi Tions ◽  
Phthalamic Acid ◽  
Work Up ◽  
Hydrolysis Of

Abstract During syntheses using the phthalimide rest in liquid, ethanolic or aqueous ammonia, phthalamides, phthalimides or phthalamic acids are formed depending on reaction condi-tions and work-up. As demonstrated by the synthesis of the title compound via hydrolysis of 4 with aqueous ammonia, dipolar ions of phthalamic acids are obtained if the phthal-imide-N substituent is sufficiently basic. The crystal structure of 5 • 4H2O has been determined and refined until R = 0.0878. It shows a vast system of hydrogen bonds.

S-Methyl 5-methylpyrazine-2-carbothioate

2007 ◽  
Vol 63 (11) ◽  
pp. o4306-o4307
Author(s):  
Emmanuel Aubert ◽  
Victor Mamane ◽  
Yves Fort
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Interplanar Spacing ◽  
Intermolecular Hydrogen Bond ◽  
Methyl Group ◽  
Compound C ◽  
Biological Interest ◽  
Hydrolysis Of ◽  
Synthetic Intermediate

The title compound, C7H8N2OS, can be a key synthetic intermediate for the preparation of various pyrazine compounds of biological interest. It was prepared by the hydrolysis of 2-tris(methylsulfanyl)methyl-5-methylpyrazine using the HgCl2/CaCO3 system. The molecule is quasi-planar; the H atoms of the methyl group linked to the pyrazine ring break the molecular mirror pseudosymmetry. One of these H atoms is involved in an intermolecular hydrogen bond with the carbonyl group of a neighbouring molecule. Two molecules related by an inversion centre interact through C—H...N hydrogen bonds, forming R 2 2(6) dimers. Neighbouring dimers interact through longer C—H...N contacts and form infinite planes parallel to (10\overline{3}). These planes interact together through C—H...O hydrogen bonds and π–π interactions (pyrazine centroids are separated by 3.99 Å and the interplanar spacing is 3.38 Å).

scholarly journals N-[(3aR*,3bS*)-1,3b,7,7-Tetramethyl-3a,3b,4,5,6,7,7a,7b-octahydro-3H-cyclopenta[3,4]cyclobuta[1,2]benzen-3a-yl]acetamide

IUCrData ◽  
2017 ◽  
Vol 2 (2) ◽  
Author(s):  
Mustapha Ait Elhad ◽  
Ahmed Benharref ◽  
Lahcen El Ammari ◽  
Mohamed Saadi ◽  
Abdelouahd Oukhrib ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Membered Ring ◽  
Dihedral Angles ◽  
Axis Direction ◽  
Compound C ◽  
The Mean ◽  
Cyclobutane Ring ◽  
Cyclopentene Ring

The title compound, C17H27NO, is built up from a four-membered ring to which a six- and a five-membered ring are fused. The cyclohexane ring has a chair conformation, while the cyclopentene ring has an envelope conformation, with the C atom substituted by the acetamide group as the flap. The dihedral angles between the mean plane of the central cyclobutane ring and the mean planes of the cyclopentene and cyclohexane rings are 62.52 (2) and 61.06 (11)°, respectively. In the crystal, molecules are linked by N—H...O hydrogen bonds, forming chains propagating along theb-axis direction.

scholarly journals Crystal structure of 2-(diphenylphosphanyl)phenyl 4-(hydroxymethyl)benzoate

2014 ◽  
Vol 70 (12) ◽  
pp. o1288-o1289
Author(s):  
Constantin Mamat ◽  
Anke Flemming ◽  
Martin Köckerling
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Intermolecular Interactions ◽  
Title Compound ◽  
Dihedral Angles ◽  
Aromatic Rings ◽  
Hydroxymethyl Group ◽  
Compound C ◽  
Hydrolysis Of

The title compound, C26H21O3P, was obtained as by-product due to the hydrolysis of the desired tosylated compound. The dihedral angles between the three aromatic rings attached to the P atom lie in the range 78.1 (1)–87.6 (1)°. The hydroxymethyl group is disordered between two conformations in a 0.719 (9):0.281 (9) ratio. The hydroxy H atom is not involved in intermolecular interactions, while the hydroxy O atom serves as a donor for weak C—H...O hydrogen bonds, which link the molecules into chains propagating in [0-11].

Preparation and characterization of diethylnicotinamidium perchlorate

2008 ◽  
Vol 62 (5) ◽  
Author(s):  
Iveta Ondrejkovičová ◽  
Dušan Mikloš ◽  
Silvia Štefániková
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Ir Spectra ◽  
Title Compound ◽  
Linear Chain ◽  
Ionic Interactions ◽  
X Ray ◽  
Hydrolysis Of ◽  
Infinite Linear

AbstractThe title compound is the first example of N,N′-diethylnicotinamidium, [denaH]+, salt which has been characterized by X-ray analysis and IR spectra. [denaH]ClO4 was obtained from the reaction mixture prepared from N,N′-diethylnicotinamide (dena) and Fe(ClO4)3 in ethanol without any addition of HClO4. The proton required for protonation of dena is produced by hydrolysis of aquairon(III) cations. In the crystal structure, cations and anions are held together by ionic interactions. The cations are linked to each other by pyridinium-carbonyl N-H⋯O=C hydrogen bonds and an infinite linear chain along axis a is formed.

Structure of Sodium Hydrogen Selenite-Selenious Acid Adduct (1:3), NaHSeO3.3H2SeO3

1992 ◽  
Vol 57 (11) ◽  
pp. 2309-2314 ◽  
Author(s):  
Josef Loub ◽  
Zdeněk Mička ◽  
Jana Podlahová ◽  
Karel Malý ◽  
Jürgen Kopf
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Heavy Atom ◽  
Selenious Acid ◽  
Space Group ◽  
Sodium Hydrogen ◽  
Heavy Atom Method ◽  
Acid Adduct ◽  
Oxygen Atoms

Structure of sodium hydrogen selenite-selenious acid (1:3) was solved by heavy-atom method and refined anisotropically to R = 0.098 for 1223 unique observed reflections. The title compound crystallizes in the Pc space group with a = 5.756(2), b = 4.911(2), c = 20.010(5) Å, β = 100.48(3)°, V = 556(1) Å3, T = 293 K, (a = 5.763(2), b = 4.878(1), c = 20.03(1) Å, β = 100.48(3)°, V = 554(1) Å3, T = 173 K), Z = 2. The structure consist of HSeO3- anions, molecules of selenious acid and Na+ cations which are octahedrally coordinated with oxygen atoms. The structure is stabilized by a system of hydrogen bonds.

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