Early events in the photochemistry of 5-diazo Meldrum's acid : Formation of a product manifold in C-N bound and pre-dissociated intersection seam regions - Li, Huijing (Beijing Institute of Technology. School of Chemistry and Chemical Engineering) ; Migani, Annapaola (Institut Català de Nanociència i Nanotecnologia) ; Blancafort, Lluís (Institut de Química Computacional i Catàlisi) ; Li, Quansong (Beijing Institute of Technology. School of Chemistry and Chemical Engineering) ; Li, Zesheng (Beijing Institute of Technology. School of Chemistry and Chemical Engineering)