A New Chiral Molecular Square with D_4 Symmetry Composed of Enantiomerically Pure Spirosilane
A cyclic tetramer of optically active spirosilane <B>1</B> was prepared as a new chiral molecular square with <I>D</I><SUB>4</SUB> symmetry by the Pd-catalyzed cross-coupling reaction, which shows a larger anisotropy factor <I>g</I><SUB>abs</SUB> in the CD spectrum relative to a series of linear oligomers of <B>1</B>.
- Chemistry letters
Chemistry letters 1999(5), 399-400, 1999-05-05
The Chemical Society of Japan