Figure 6.
![Synthesis of negatively curved molecular carbons. (a) Several negatively curved PAHs containing seven- or eight-membered rings. Adapted with permission from refs [30,137,139–142]. Copyright 2019 John Wiley and Sons; copyright 2013 Springer Nature; copyright 2023 Elsevier; copyright 2023 American Chemical Society; copyright 2019 John Wiley and Sons; copyright 2022 American Chemical Society. (b, c) Typical synthetic routes for preparing PAHs containing [8]circulene units by (b) in-out and (c) out-in cyclization. Adapted with permission from refs [29,138]. Copyright 2019 American Chemical Society; copyright 2017 John Wiley and Sons.](https://oup.silverchair-cdn.com/oup/backfile/Content_public/Journal/nsr/12/5/10.1093_nsr_nwaf125/1/nwaf125fig6.jpeg?Expires=1749317896&Signature=HZrqVG4GF58O4DxG5zGCKIIqtUfvnobYOdcGTDWCcdEH7~m9Wk5prUpYY~K41UmAZAURaBRe0bCa4rJWpkTdgLai42XtRB88yB3YWbh-r-pp5Q6DA1h7WhSGkJYHvUFrGUI-HgQOdpZWaWcCFlTITsJwQAZcX6SiHNXZynzWyn1syJT1kcLJ8sfnaSYoVbcyOfASzS6QpTRiv8YcfQLgOEBura09A7-RJgAIdYtSsNa3HK7hwVHFIVoGm-Brod9FAMWTE6tgN1yRQwePukZYhfFC2UMYTP2m4CHfpOU~mDT0V9osop~aRzGUawTFwSKXZKc~E-0dnSpknIjztFcoMw__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Synthesis of negatively curved molecular carbons. (a) Several negatively curved PAHs containing seven- or eight-membered rings. Adapted with permission from refs [30,137,139–142]. Copyright 2019 John Wiley and Sons; copyright 2013 Springer Nature; copyright 2023 Elsevier; copyright 2023 American Chemical Society; copyright 2019 John Wiley and Sons; copyright 2022 American Chemical Society. (b, c) Typical synthetic routes for preparing PAHs containing [8]circulene units by (b) in-out and (c) out-in cyclization. Adapted with permission from refs [29,138]. Copyright 2019 American Chemical Society; copyright 2017 John Wiley and Sons.
