B. H/D Isotope Effects in OHN Hydrogen Bonded Pyridine–Acid and Collidine–Acid Complexes ... 210 1. Low-Temperature NMR Spectroscopy of Pyridine–Acid Complexes Dissolved in Liquefied Freon Mixtures ... 210 2. Geometric Hydrogen Bond Correlations of OHN Hydrogen Bonded Complexes...
Selective introduction of hydrogen isotopes by electrolytic reduction of the carbon-halogen bond1. We studied the reaction of 1,3,3,5-tetrachioropentane, 1,1,1,3-tetrachloro-3-phenylpropane, and 2,2,4-trichloropentane with zinc in diverse solvents as the medium, which reaction leads to the...
The short carbonyl carbon–nitrogen bond length, 0.132 nm (the usual carbon–nitrogen single bond length is 0.147 nm), is consistent with the partial double-bond character of the peptide linkage. The planarity and rigidity of the peptide bond are accounted for by the fact that free rotation ...
The isotopic shift of the transition temperature in DGN and its dependence on the H-bond lengthperaluminous granitesstronlium isotopesinherited zirconsoxygen isotopesCaledonianAcadianThe isotopic shift of the transition temperature TC of diglycine nitrate (DGN) has been obtained from the measurements of ...
bond length bond angle the bond enthalpy bond order definition: covalent bonds can be characterized on the basis of several bond parameters such as bond length, bond angle, bond order, and bond energy (also known as bond enthalpy). these bond parameters offer insight into the stability of a ...
bond length brackets chiral flag chiral flag error circular r-group reference coordination system error covalent counterion crossed double bond custom checkers and fixers double bond stereo error ez double bond empty structure explicit hydrogen explicit lone pairs incorrect tetrahedral stereo isotope ...
Flakus H T,Tyl A,Jones P G.'Self-organization,processes in proton and deuteron mixtures in open-chain hydrogen bond systems:Polarization IR spectra of 4-mercaptopyridine crystals[J].Spectrochimica Acta-Part A:Molecular and Biomolecular Spectroscopy,2002,58(2):299-310....
Hydrogen bondIncoherent tunnellingThis paper deals with spin-lattice relaxation due to classical jumps and incoherent tunnelling of protons and deuterons in hydrogen bonds in solids. An analysis of experimental spin-lattice relaxation data for carboxylic acids suggests that tunnelling does not contribute ...
discussing a trend of bond shortening at helix midpoints due to the cooperative effect of H-bonding along the length of the helix [34]. Similarly, Tan et al. have shown how the strength of an H-bond is dependent on the donor-acceptor angle, introducing the concept of an ‘antecedent an...