A Catenated Cyclic Octamine : A Noncovalently Bonded Molecular System without Attractive Interaction between the Two Units
A novel catenane consisted of two cyclic tetramine units (<B>6</B>) was prepared and characterized in terms of mobility of the units. The preparation of <B>6</B> was performed by reduction of the corresponding cyclic octamide-type catenane (<B>3</B>) with borane. Varying temperature NMR study indicated that the units of <B>6</B> actually move or rotate quite freely unlike those of <B>3</B>, evidently suggesting a noncovalently bonded molecule without attractive interaction<SUP>1</SUP> between the two units.
- Chemistry letters
Chemistry letters 1997(9), 881-882, 1997-09
The Chemical Society of Japan