Spin-state control of thermal and photochemical Bergman cyclization

Spin-state control of thermal and photochemical Bergman cyclization

Thermal Bergman cyclization of Pt(II) dialkynylporphyrins reveals a marked reduction in the cyclization temperature relative to the free base and Zn(II) derivatives. In contrast, photogenerated (3)ππ* population produces no detectable Bergman photocyclization, suggesting that the photoreactivities o...

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Veröffentlicht in:Chemical communications (Cambridge, England) England), 2013-03, Vol.49 (21), p.2145-2147
Hauptverfasser: Boerner, Leigh J K, Pink, Maren, Park, Hyunsoo, LeSueur, Amanda, Zaleski, Jeffrey M
Format: Artikel
Sprache:eng
Schlagworte:
Coordination Complexes - chemistry
Cyclization
Derivatives
Photochemical
Photochemical Processes
Platinum - chemistry
Porphyrins - chemistry
Quantum Theory
Reduction
Temperature
Zinc - chemistry
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Zusammenfassung:Thermal Bergman cyclization of Pt(II) dialkynylporphyrins reveals a marked reduction in the cyclization temperature relative to the free base and Zn(II) derivatives. In contrast, photogenerated (3)ππ* population produces no detectable Bergman photocyclization, suggesting that the photoreactivities of the related free base and Zn(II) derivatives occurs via the (1)ππ* state.
ISSN:1359-7345
1364-548X
DOI:10.1039/c3cc34471a