Receised 7 February -969 Distortional effects on the barrier to L?p?nal rotation of ethane x-e investigated through ab tnttto calculations. yielding a theoretical barrier of 3.071 kcal/mole (experimental 2.928 kcal/mole). The com-Lwted barrier is 3.064 kcal/moIe ior borazane and 1.44 kcal/mole for m
Nonadditivity of interbond interactions and the rotation barrier in ethane a preliminary investigation
โ Scribed by G.F. Musso; V. Magnasco
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 284 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Additive (p&wise) and nonadditive contributions to the rotnrion barrier in cthane arc esplicit!y evaluated with ah-initio calcularions based on two approsimate separations ol the clcctron-nucleus potcnlial. Nonadditivc cffccts beyond three-body xc seen 10 bc negligible, ;I result which un bc wry useful Ibr applications IO larger molecules.
๐ SIMILAR VOLUMES
Sasis sets. Minimum basis set calculations predict the barrier in ethyl fluoride to be 0.5 kcd/mole smaller than the ethzne barrier. Extended basjs set cdcufations give barriers of 3.4 and 3.3 kcal/mole for ethyl fluoride and ethane. These results are in better ;igrecment with the espcrimcntal value
## Abstract Molecular Dynamic (MD) simulations were carried out to determine the MaxwellโStefan (MโS) diffusivities, ฤ~i~, and selfโdiffusivities, __D__~i,self~, of methane (C1), ethane (C2), and propane (C3) for a variety of molecular loadings, __q__~i~, in three classes of zeolite topologies: (1)
## Abstract The barriers to rotation about the C(O)๏ฃฟN bond for 13 ฮฑโalkylโ and ฮฑโhaloโsubstituted __N__โtheylโ__N__โmethylamides were determined by ^1^H NMR spectroscopy at coalescence temperature. Plots of Gibbs free energy (ฮ__G__ยฐ) and Gibbs energy of activation (ฮ__G__โก) values against Charton'