Journal
ORGANIC LETTERS
Volume 23, Issue 12, Pages 4860-4863Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.1c01595
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- A*STAR AME grant [A20E5c0089]
- NRF Investigatorship [NRF-NRFI05-2019-0005]
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Both molecules have a highly strained structure and exhibit open-shell singlet diradical character with a small singlet-triplet energy gap.
The synthesis and characterization of two 1,8-naphthalene-bridged cyclic oligo-para-phenylenes with four or eight phenylene units are reported. Both molecules exhibit a highly strained structure with two nearly face-to-face arranged p,p'-biphenylylene/p,p'-quaterphenylylene chains. Their dications were obtained by chemical oxidation with NO center dot SbF6, and both showed open-shell singlet diradical character with a small singlet-triplet energy gap.
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