(13)C CP MAS NMR study of some 4,4'-disubstituted-trans-azobenzenes

• Autorzy: Maciejewska D. , Koleva V. , Wawer I.
• Języki publikacji: EN

Abstrakty

EN

Azobenzenes with para-dimethylamino group at aromatic ring and various para substitutes to another phenyl have been studied by (13)C CP MAS NMR spetroscopy followed by semi-empirical AMI MO calculations. The locked trans-configuration around N=N bond in the state results in non-equivalence of ortho carbons (C2 and C6, also C2' and C6') and the diference in chemical shifts is 12.9-22.0 ppm. The separation of meta carbons resonances is less manifested but in 1, 3, 4, 8 the non-equivalence of C3' and C5' is enhanced by the orientation of X-substituents at C4'.

Słowa kluczowe

EN

solid state (13)C NMR; 4,4'-disubstituted-trans-azobenzenes; AMI semi-empirical calculation

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1998
• Tom: Vol. 72, nr 12
• Strony: 2531--2536
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Maciejewska D.

autor

Koleva V.

autor

Wawer I.

• Departament of Physical Chemistry , Faculty of Pharmacy Medical University of Warsaw I. Banacha, 02-097 Warsaw, Poland