Search for a trans-Disulfide: Structural Analysis of Di-tert-adamantyl Disulfide by Photoelectron Spectroscopy, Derivation of σI (t-Ad), and Molecular Mechanics Calculations for Related Bulky Disulfides
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Search for a trans-Disulfide : Structural Analysis of Di-tert-adamantyl Disulfide by Photoelectron Spectroscopy, Derivation of σI (t-Ad), and Molecular Mechanics Calculations for Related Bulky Disulfides. / Jørgensen, Flemming S.; Snyder, James P.
In: Journal of Organic Chemistry, Vol. 45, No. 6, 01.01.1980, p. 1015-1020.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Search for a trans-Disulfide
T2 - Structural Analysis of Di-tert-adamantyl Disulfide by Photoelectron Spectroscopy, Derivation of σI (t-Ad), and Molecular Mechanics Calculations for Related Bulky Disulfides
AU - Jørgensen, Flemming S.
AU - Snyder, James P.
PY - 1980/1/1
Y1 - 1980/1/1
N2 - Photoelectron spectroscopy of t-Ad-SS-t-Ad yields an IE(n) - IE(n+) energy difference of 0.51 eV at the frontier orbital gap suggesting to an S-S dihedral angle of θ(CSSC) = 103°. Molecular mechanics calculations with Allinger's MMI yield a shallow energy minimum with respect to rotation about the S-S bond. Two conformations differing by 0.7 kcal/mol are located at θ(CSSC) = 100 and 114°. Regression analysis of dialkyl disulfide ionization energies and substituent inductive parameters (σI) leads to σ(t-Ad) = -0.089, indicating t-Ad to be a better electron donor than t-Bu. Finally force field calculations for several sterically congested disulfides suggest that trans disulfides may be realizable for very large alkyl substituents such as the (t-Bu)3C, polymethyladamantyl, and trimethylperhydrotriquinicenyl moieties.
AB - Photoelectron spectroscopy of t-Ad-SS-t-Ad yields an IE(n) - IE(n+) energy difference of 0.51 eV at the frontier orbital gap suggesting to an S-S dihedral angle of θ(CSSC) = 103°. Molecular mechanics calculations with Allinger's MMI yield a shallow energy minimum with respect to rotation about the S-S bond. Two conformations differing by 0.7 kcal/mol are located at θ(CSSC) = 100 and 114°. Regression analysis of dialkyl disulfide ionization energies and substituent inductive parameters (σI) leads to σ(t-Ad) = -0.089, indicating t-Ad to be a better electron donor than t-Bu. Finally force field calculations for several sterically congested disulfides suggest that trans disulfides may be realizable for very large alkyl substituents such as the (t-Bu)3C, polymethyladamantyl, and trimethylperhydrotriquinicenyl moieties.
UR - http://www.scopus.com/inward/record.url?scp=0007438193&partnerID=8YFLogxK
U2 - 10.1021/jo01294a020
DO - 10.1021/jo01294a020
M3 - Journal article
AN - SCOPUS:0007438193
VL - 45
SP - 1015
EP - 1020
JO - Journal of Organic Chemistry
JF - Journal of Organic Chemistry
SN - 0022-3263
IS - 6
ER -
ID: 218715279