Synthesis of podands bearing aromatic end groups and complex formation with tropylium tetrafluoroborate in 1,2-dichloroethane
✍ Scribed by Markku Lämsä; Kirsi Raitamaa; Jouni Pursiainen
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 89 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0894-3230
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✦ Synopsis
A series of podands bearing phenyl, naphthyl and anthryl end groups were prepared and characterized. UV-visible spectrophotometry was used to investigate the host-guest chemistry of the podands in complexation with tropylium tetrafluoroborate in 1,2-dichloroethane. The results are discussed and compared with those for previously studied systems containing crown ethers. The stability constants for these open-chain polyethers are in the range 5.1-8.4 dm 3 mol À1 , except for the podand having anthryl end groups [1,12-bis(anthryl-9)-2,5,8,11-tetraoxadodecane], which gives a 10-fold increase in the stability constant.