title: Spin-state control of thermal and photochemical Bergman cyclization.
abstract: 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.
authors: Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana, USA.
authors: Leigh J K
authors: LJ
authors: Boerner
authors: Maren
authors: M
authors: Pink
authors: Hyunsoo
authors: H
authors: Park
authors: Amanda
authors: A
authors: LeSueur
authors: Jeffrey M
authors: JM
authors: Zaleski
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D003500:Cyclization; D055668:Photochemical Processes; D010984:Platinum / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry; D011789:Quantum Theory; D013696:Temperature; D015032:Zinc / Q000737:chemistry
chemical_list: D056831:Coordination Complexes; D011166:Porphyrins; D010984:Platinum; D015032:Zinc