(2) Thehydrogen atoms except aromatic H1 and H5 and all of the oxygen atoms can form hydrogen-bondswith H2O and CH3CH2OH. Ethanol and water form strong hydrogen-bonds with the hydroxyl, carbonyl and ether groups
4b). However, such strategies always yield the desired rotaxane as an ammonium salt with the crown ether interacting, through multiple hydrogen bonds, with the protonated nitrogen on the axle. Fig. 4: Hydrogen bonds in the synthesis of a rotaxane. Two synthetic strategies involving hydrogen bond...
92,93 Additionally, the formation of metal-organic coordination bonds and hydrogen bonding can yield 2D- and 1D-perovskite phases in the bulk, causing a positive passivating effect.94,95 Organic molecules can also be used as post-passivation after the crystallization of the perovskite. This ...
Aniline vinylether CAN cat syn cis-2-methyl-4-hydroxy sun tetrahydroquinoline tetrahydroquinolinol Pd/C O2 dehydrogenate oxidat quinolineMenendez, J C
The nitrogen atom is capable of forming Coulomb interactions, hydrogen bonds and weak interactions including van der Waals forces and dipole–dipole interactions, which enable amino-containing compounds to bind with high affinity to various enzymes and receptors as biological targets. Moreover, the ...
2,3-BDO can be produced by catalytic hydrogenation of saccharides with hydrogen at elevated pressures and temperatures, Fig.2. Hirth et al. [223] reported that by increasing temperature to approximately 225 °C or higher, selectivity can be shifted toward C2, C3, C4, and/or C6 polyols, suc...
Because there are hydrogen bonds between the molecules of microcrystalline cellulose, the hydrogen bonds are associated when pressed, so it has a high degree of compressibility and is often used as a binder; when the compressed tablet encounters liquid, water quickly ...
The polymer chains have a block structure or a random distribution of ether and ester bonds. Using the method described in this patent, it is not possible to control the comonomer insertion. WO 01/04179 and EP 1 112 243A describe the production of esters with one or more bound polyether...
In a molecule, these are metal-metal bonds. For structures emerging not due to internal bonding, but as a result of external molecular (self-)assembly forces such as dense packing and minimization of the surface energy, we need a different term with an unequivocal everyday life image to ...
is pH sensitive. Carboxylic acid groups of the PMMA tend to be protonated at low pH. Hydrogen bonds form between carboxylic acid groups and the ether oxygens on the PEG chain. This reversible ionic polymerization increases the hydrophobicity of the polymer matrix, and water is expelled from the...