![]() ![]() Tender Claws is developing and publishing Stranger Things VR in partnership with series writers to explore Henry Creel’s transformation into the villain Vecna. Study coauthor David Sanchez was supported by Lawrence Livermore National Laboratory.Stranger Things VR is coming in late 2023 with one of VR’s most innovative development studios making the game in collaboration with Netflix. MeV-UED is operated as part of the Linac Coherent Light Source at the SLAC National Accelerator Laboratory, supported in part by the DOE Office of Science, Office of Basic Energy Sciences, SUF Division Accelerator and Detector R&D program, the LCLS Facility, and SLAC. This work was supported by the AMOS program in the Department of Energy (DOE) Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division. The single bond dissociation, which leads to the opening of the alpha-terpinene ring, happens later, during the transformation of the molecule from the critical geometry to the reaction products. Instead, the stereospecificity is determined by the fact that the change from two to three double bonds has largely already happened when the molecule assumes the critical geometry. The new results suggest that the origins of the stereospecificity do not lie in the exact nature of the motion. The Woodward-Hoffmann rules predict that the stereospecificity of the reaction in alpha-terpinene is ensured by a rotation of the ends of the emerging chain-like reaction product away from each other in the same clockwise or counter-clockwise direction. The present study investigated a photochemical (i.e., light-triggered) electrocyclic ring-opening reaction with a combination of ultrafast electron diffraction and simulations of the reaction dynamics in alpha-terpinene. The stereospecificity can be predicted by the well-known Woodward-Hoffmann rules. The synchronization of these processes and the single critical configuration ensure their stereospecificity, a characteristic that makes them an important tool for synthetic chemistry. In the case of alpha-terpinene, the molecule studied in this project, two double bonds and one single bond are transformed into three double bonds. ![]() This can help make organic chemistry a more powerful tool.Įlectrocyclic reactions are characterized by the simultaneous formation and dissociation of multiple chemical bonds through one critical geometry. Additionally, they open a path for researchers to create new rules for other types of reactions. The new results help to address this open question. ![]() However, the rules do not give a detailed answer why reactions generate only specific reaction products. These rules received the Nobel Prize in chemistry in 1981 and are taught to every organic chemist during their undergraduate education. These products can be predicted by the Woodward-Hoffmann rules. ![]() Chemists use the reaction investigated in this study, a so-called electrocyclic reaction, because it generates very specific reaction products. ![]()
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