Non-Covalent Interactions in Molecular Systems: Thermodynamic Evaluation of the Hydrogen-Bond Strength in Amino-Ethers and Amino-Alcohols was written by Siewert, Riko;Zherikova, Kseniya V.;Verevkin, Sergey P.. And the article was included in Chemistry – A European Journal in 2022.Product Details of 109-85-3 The following contents are mentioned in the article:
The intramol. hydrogen bond (intra-HB) is one of the best-known examples of non-covalent interactions in mols. Among the different types of intramol. hydrogen bonding, the NH···O hydrogen bond in amino-alcs. and amino-ethers is one of the weakest. In contrast to the strong OH···N intramol. hydrogen bond, the strength of the NH···O bond can hardly be measured with conventional spectroscopic methods, even for simple amino-alcs., since the band belonging to the NH···O conformer merges with the free OH band. In this work, we developed a combination of G4 calculations, and a method based on exptl. vaporization enthalpies to determine the NH···O hydrogen bonding strength. The archetypal compounds for this study are 2-amino-1-ethanol and 3-amino-1-propanol as well as their resp. methoxy analogs. Based on these mols., different series were studied to investigate various factors influencing NH···O intra-HB strength. In the first series, the influence of alkylation near the hydroxy or methoxy group and the amino group in sterically hindered aminoalcs. was examined In the second series, the influence of alkylation of the amino-group was investigated. In the third series, the effect of extending the alkyl chain between functional groups was studied. This study involved multiple reactions and reactants, such as 2-Methoxyethylamine (cas: 109-85-3Product Details of 109-85-3).
2-Methoxyethylamine (cas: 109-85-3) belongs to ethers. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Product Details of 109-85-3
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem