THE INTERACTION OF FRIEDEL–CRAFTS CATALYSTS WITH ORGANIC MOLECULES: II. BORON TRIFLUORIDE WITH BENZOIC ANHYDRIDE

1962 ◽  
Vol 40 (3) ◽  
pp. 445-448 ◽  
Author(s):  
Denys Cook
Keyword(s):  
Infrared Spectrum ◽  
Boron Trifluoride ◽  
Organic Molecules ◽  
Carbonyl Groups ◽  
Benzoic Anhydride

The complex of boron trifluoride with benzoic anhydride has been prepared. One molecule of anhydride coordinates three molecules of boron trifluoride. The infrared spectrum shows that coordination takes place at the carbonyl groups, whose frequency is lowered some 200 cm−1. There is no trace of the benzoylium cation, C6H5O+. Although the spectra are complex, tentative assignments are made.

scholarly journals Crystal structure of methyl 4-(4-hydroxyphenyl)-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate monohydrate

2016 ◽  
Vol 72 (9) ◽  
pp. 1335-1338 ◽  
Author(s):  
Keshab M. Bairagi ◽  
Katharigatta N. Venugopala ◽  
Pradip Kumar Mondal ◽  
Bharti Odhav ◽  
Susanta K. Nayak
Keyword(s):  
Hydrogen Bonds ◽  
Organic Molecules ◽  
Weak Interactions ◽  
Three Dimensional ◽  
Ester Group ◽  
Dihedral Angles ◽  
Water Molecules ◽  
Carbonyl Groups ◽  
Dimensional Network ◽  
Hydroxy Groups

The title hydrate, C13H14N2O4·H2O, crystallizes with two formula units in the asymmetric unit (Z′ = 2). The dihedral angles between the planes of the tetrahydropyrimidine ring and the 4-hydroxyphenyl ring and ester group are 86.78 (4) and 6.81 (6)°, respectively, for one molecule and 89.35 (4) and 3.02 (4)° for the other. In the crystal, the organic molecules form a dimer, linked by a pair of N—H...O hydrogen bonds. The hydroxy groups of the organic molecules donate O—H...O hydrogen bonds to water molecules. Further, the hydroxy group accepts N—H...O hydrogen bonds from amides whereas the water molecules donate O—H...O hydrogen bonds to the both the amide and ester carbonyl groups. Other weak interactions, including C—H...O, C—H...π and π–π, further consolidate the packing, generating a three-dimensional network.

Noncovalent functionalization of multi-walled carbon nanotubes as metal-free catalysts for the reduction of nitrobenzene

2014 ◽  
Vol 4 (6) ◽  
pp. 1730-1733 ◽  
Author(s):  
Xianmo Gu ◽  
Wei Qi ◽  
Shuchang Wu ◽  
Zhenhua Sun ◽  
Xianzhu Xu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Active Sites ◽  
Organic Molecules ◽  
Carbonyl Groups ◽  
Small Organic Molecules ◽  
Metal Free ◽  
Noncovalent Functionalization ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Multi-walled carbon nanotubes were functionalized noncovalently with small organic molecules containing specific ketonic carbonyl groups. The comparison of intrinsic activities for a series of catalysts indicates that carbonyl groups are active sites in the reduction of nitrobenzene.

scholarly journals (S)-3-[(S)-5-(4-Fluorophenyl)-5-hydroxypentanoyl]-4-phenyloxazolidin-2-one 0.67-hydrate

IUCrData ◽  
2017 ◽  
Vol 2 (2) ◽  
Author(s):  
Xiao-Guang Wang ◽  
Qing-Shuang Ma ◽  
Bin Sun ◽  
Lei Xu ◽  
Feng-Tao Zhan ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Organic Molecules ◽  
Three Dimensional ◽  
Water Molecules ◽  
Supramolecular Architecture ◽  
Carbonyl Groups ◽  
Asymmetric Unit ◽  
Axis Direction ◽  
Solvent Water

The asymmetric unit of the title compound, 3C20H20FNO4·2H2O, consists of three (S)-3-[(S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyloxazolidin-2-one molecules and two solvent water molecules. The carbonyl groups of the oxazolidin-2-one and hydroxypentanoyl units are orientedantito one another in each molecule. In the crystal, O—H...O, C—H...O and C—H...F hydrogen bonds link the molecules into a three-dimensional supramolecular architecture with the organic molecules linked by water molecules and stacked along theb-axis direction.

scholarly journals The Shape-Memory Effect of Hindered Phenol (AO-80)/Acrylic Rubber (ACM) Composites with Tunable Transition Temperature

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2461 ◽  
Author(s):  
Shi-kai Hu ◽  
Si Chen ◽  
Xiu-ying Zhao ◽  
Ming-ming Guo ◽  
Li-qun Zhang
Keyword(s):  
Transition Temperature ◽  
Shape Memory ◽  
Molecular Hydrogen ◽  
Shape Recovery ◽  
Organic Molecules ◽  
Shape Memory Polymers ◽  
Carbonyl Groups ◽  
Rubber Composites ◽  
Small Organic Molecules ◽  
Hindered Phenol

To broaden the types and scope of use of shape-memory polymers (SMPs), we added the hindered phenol 3,9-bis[1,1-dimethyl-2-{b-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy}ethyl]-2,4,8,10-tetraoxaspiro-[5,5]-undecane (AO-80), which comprises small organic molecules, to acrylic rubber (ACM) to form a series of AO-80/ACM rubber composites. The structural, thermal, mechanical property, and shape-memory properties of the AO-80/ACM rubber composites were investigated. We identified the formation of intra-molecular hydrogen bonding between –OH of AO-80 and the carbonyl groups and the ether groups of ACM molecules. The amount of AO-80 used can be adjusted to tailor the transition temperature. AO-80/ACM rubber composites showed excellent shape recovery and fixity. The approach for adjusting the transition temperature of AO-80/ACM rubber composites provides remarkable ideas for the design and preparation of new SMPs.

THE INTERACTION OF FRIEDEL–CRAFTS CATALYSTS WITH ORGANIC MOLECULES: III. THE CH3COCl:GaCl3 SYSTEM

1962 ◽  
Vol 40 (3) ◽  
pp. 480-485 ◽  
Author(s):  
Denys Cook
Keyword(s):  
Solid State ◽  
Infrared Spectrum ◽  
Pure State ◽  
Acetyl Chloride ◽  
Organic Molecules ◽  
Ionic Species ◽  
Chloride Complex ◽  
Nitrobenzene Solution ◽  
Strong Band ◽  
Gallium Trichloride

The equimolar complex of acetyl chloride and gallium trichloride has been prepared and its infrared spectrum, both in the pure state and in nitrobenzene solution, has been recorded. In the pure complex a strong band at 2300 cm−1, hitherto attributed to the acetylium ion, has been observed. In solution in nitrobenzene, the 2300 cm−1 band is almost completely replaced by one at 2200 cm−1, while undissociated CH3COCl is present. Certain bands in this spectrum are consistent with the presence of the nitrobenzene – gallium chloride complex. A re-evaluation of the assignments of the acetylium ion suggests that a more complicated ionic species may be present in the solid state, possibly [CH3CO … GaCl3]+Cl−.

Reaction of H + HONO in solid para-hydrogen: infrared spectrum of ˙ONH(OH)

2017 ◽  
Vol 19 (24) ◽  
pp. 16169-16177 ◽  
Author(s):  
Karolina Anna Haupa ◽  
Alexander Godfried Gerardus Maria Tielens ◽  
Yuan-Pern Lee
Keyword(s):  
Infrared Spectrum ◽  
Organic Molecules ◽  
Para Hydrogen ◽  
Mechanism Of Formation ◽  
Interstellar Clouds ◽  
Hydrogenation Reactions

Hydrogenation reactions in the N/O chemical network are important for an understanding of the mechanism of formation of organic molecules in dark interstellar clouds, but many reactions remain unknown.

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