140834-29-3

Upstream product

• 78053-58-4 1,8-diethynylanthracene 
• 140834-28-2 4-Brom-3',5'-di-tert-butylstilben 
• 62938-08-3 3,5-di-tert-butylbenzyl bromide 
• 14381-66-9 1,8-dichloroanthracene 
• 119796-31-5 1,8-Bis<2-(trimethylsilyl)ethinyl>anthracen 
• 1122-91-4 4-bromo-benzaldehyde 

Relevant academic research and scientific papers

Tweezer-Shaped Hydrocarbons

1,8-Bis- and anthracenes of type I (e.g. 9, 6a) and 1,8-bisethynyl>- and -ethynyl>anthracenes of type II (e.g. 16, 13) were synthesized for the first time.Their hydrocarbon framework is formed by Grignard coupling and by Hagihara coupling, respectively.An X-ray analysis of 13 exhibits an approximate planar skeleton, only one aromatic ring showing a considerable deviation from that plane (Figure 2).The UV and fluorescence properties are discussed.In spite of their preorganized and rather rigid tweezer-shape the new hydrocarbons do not seem to use their multiple bonds for the cooperative binding of transition metal cations. Key Words: Hagihara coupling / Alkynes / Anthracenes / Molecular tweezers / Nanoscale molecules