Cyclopropenimine as a hydrogen bond acceptor—towards the strongest non-phosphorus superbasesOrganic superbaseHydrogen bondsDFT calculationsProton affinityPKaUtilizing dialkylamino cyclopropenimines as hydrogen bond acceptors in tri-substituted guanidines and cyclopropenimines, we computationally designed the ...
The three predicted absorption peaks (696, 720, and 746 cm−1), occurring below 750 cm−1, arise from the libration of three neighboring DDAh-type neutral water molecules around the surface-bound H3O+ ion in the single hydrogen-bond acceptor configurations. The remaining bands in this...
Halogen bonding (XB) is a strong intermolecular interaction that is commonly compared to hydrogen bonding (HB)1,2,3,4,5,6,7. Both interactions are nearly linear attractions between a nucleophile (an HB or XB-acceptor) and an electrophilic site on the terminus of either a hydrogen or halogen...
Theoretically, this process has a standard electrode potential (E0) of 0.401 V versus the standard hydrogen electrode (SHE) and a formal potential (\(E^{0\prime }\)) of 1.229 V versus the reversible hydrogen electrode (RHE) [22,23]. In practical operations, however, it proceeds through m...
It then forms a short (2.5 Å) hydrogen bond with the Oγ atom of another fully conserved residue, S54 (S36 in P. aeruginosa), which in turn is held in place by yet another invariable residue, R63 (R45 in P. aeruginosa) (Fig. 4). These residues thus show an intricate pattern ...
1– strongest base 2– intermediate base 3– weakest base 4– not a B-L base 3 4 4 2 1 4 Molecular Structure and Acid Strength What makes a strong acid? A weak H–A bond, so H+ can be easily removed! smaller bond energy larger acid strength Consider the binary acids HF, HCl, ...
In this unique structure, the strongest bond is the in-plane σC-C bond, and the out-of-plane π bond is responsible for the electron conduction of graphene, which offers weak interaction among graphene layers or between graphene and the substrate [131]. Due to this unique electronic ...
It can be seen that the composite filled with ACPS silanized nanosilica showed the highest sorption value (2.68 μg/mm3) relative to the other tested materials, maybe as a result of its strongest hydrophylicity, which is responsible for hydrogen bonding between ester groups of the methacrylate ...
Weaker electrostatic interactions of two atoms appear in their mutual polarization—the displacement of the electrons with respect to the nuclei, which is strongest for the weakly bound outer electrons. There arise polarization forces of attraction between atoms which must be considered even for large ...
Answer and Explanation:1 The structure of Vitamin C is as shown in the image (1): (1) The hydrogen atom attached to {eq}\rm -OH {/eq} bond that participates in... Learn more about this topic: Acidic Solution Definition, Properties & Examples ...