Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 74, Issue 1, Pages 408-411Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo802080g
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Funding
- National Science Foundation of China [20572015, 20672028]
- Program for New Century Excellent Talents in University [NCET-05-0610]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars
- State Education Ministry
- Program for Young Excellent Talents in Henan Universities
- Program for Extraordinary Professors of Henan University
- Foundation of Henan University [06YBZR011, 07YB2R006]
- Technical Institute of Physics and Chemistry of CAS
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The efficient synthesis of (TMS)(2)-[7]helicene (rac-3) and double helicene, a D-2-symmetric dimer of 3,3'-bis(dithieno-[2,3-b:3',2'-d]thiophene) (rac-4) was developed. The crystal structures of 3 and 4 show both strong intermolecular pi-pi interactions and S center dot center dot center dot S interactions. UV/vis spectra reveal that both 3 and 4 show significant pi-electron delocalization.
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