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In chemistry, a hydrogen bond (or H-bond) is primarily an electrostatic force of attraction between a hydrogen (H) atom which is covalently bonded to a more electronegative "donor" atom or group (Dn), and another electronegative atom bearing a lone pair of electrons—the hydrogen bond acceptor (Ac).
30 sty 2023 · Hydrogen bonding in organic molecules containing nitrogen. Hydrogen bonding also occurs in organic molecules containing N-H groups; recall the hydrogen bonds that occur with ammonia. Examples range from simple molecules like CH 3 NH 2 (methylamine) to large molecules like proteins and DNA. The two strands of the famous double helix in DNA are ...
3 lis 2020 · Hydroamination of alkenes, the addition of the N–H bond of an amine across an alkene, is a fundamental, yet challenging, organic transformation that creates an alkylamine from two abundant...
15 lis 2018 · The intramolecular dihydrogen-bonding interactions in neutral (M–H···H–N) and ionic (M–H···H–N +) forms appear to be reasonable motifs en route to an η 2-H 2 complex at the H-cluster.
16 mar 2017 · The experimental determination of N-H bond dissociation free energies (BDFEs) in coordinated nitrogen ligands provides the foundation for understanding transformations relevant to ammonia synthesis.
22 lip 2022 · Cross-dehydrogenative couplings of C−H and N−H motifs serve as a unique class of the most atom-economical and straightforward strategies for constructing C−N bonds. Herein, we enclosed the most updated methodologies developed in the assembly of C−N bonds via photo-catalyzed, transition-metal-catalyzed, electrochemical, and metal-free ...
24 sty 2008 · A nuclear magnetic resonance (NMR) experiment is described for the direct detection of N–H ⋯ N hydrogen bonds (H-bonds) in 15 N isotope-labeled biomolecules.
