The syntheses, NMR and photochromic properties of modified dimethyldihydropyrenes
The cyclopentadienone-fused dihydropyrenes 46 and 47 were synthesized. The internal methyl resonances, the coupling constants, NICS calculations and X-ray results confirmed that the cyclopentadienone displays antiaromatic character resulting in bond localization in the annulene ring consistent with...
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| Language: | English en |
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2007
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| Online Access: | http://hdl.handle.net/1828/247 |