Author/Authors :
Semenov، نويسنده , , Vaycheslav E and Akamsin، نويسنده , , Valentin D and Reznik، نويسنده , , Vladimir S and Chernova، نويسنده , , Alla V and Dorozhkina، نويسنده , , Galina M and Efremov، نويسنده , , Yurij Ya and Nafikova، نويسنده , , Adilay A، نويسنده ,
Abstract :
Acyclic and cyclic counterparts containing thymine and two 3,6-dimethyluracil fragments bridged by methylene chains have been prepared and studied by UV and NMR spectroscopy; in water the uracil units of the acyclic counterpart form an intramolecular stack but arrange in a linear array in chloroform while the fragments of the uracilophane form an intramolecular stack both in chloroform and water; uracil units of bis(3,6-dimethyluracil-1-yl)butane and the macrocyclic counterpart form a stack in chloroform.
Keywords :
uracilophanes , hypochromism , hyperchromism , stacking
