Rotationsbarriere der Endgruppen bei Poly- methinoxonolen verschiedener Kettenlänge / Rotation Barrier of the End Groups of Polymethine Oxonols with Different Chain Lengths
1976 ◽
Vol 31
(8)
◽
pp. 1017-1018
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Keyword(s):
H Nmr
◽
Abstract Polymethine oxonols show temperature dependent 1H-NMR-spectra because of restricted rotation of the end groups. The dependence of the value of the corresponding free enthalpy of activation AGt on the length of the poly-methine chain can be explained by the change of the π-electron contribution to ⊿G≠.
1997 ◽
Vol 52
(8)
◽
pp. 883-894
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1999 ◽
Vol 64
(4)
◽
pp. 685-695
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Keyword(s):
1985 ◽
Vol 40
(10)
◽
pp. 1229-1232
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Keyword(s):