[1]State Key Laboratory of Elemento-Organic Chemistry Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) College of Chemistry Nankai University Tianjin 300071 China;
[3]Department of Chemical Engineering and Safety Binzhou University Binzhou 256603 China;
[2]Central Laboratory College of Chemistry Nankai University Tianjin 300071 China;
Koser’s reagent; double dehydrogenation; hypervalent twisting; 2; 3-benzotropone; DFT calculations;