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Breakthrough in Chemistry: Scientists Unveil Hidden Pathway of the Ullmann Reaction Edited by Fasi Uddin 28 September 2025 The Ullmann reaction, one of the most reliable and time-tested tools in organometallic chemistry, has taken center stage again. For over a century, this copper-mediated process has been trusted for building carbon-carbon and carbon-heteroatom bonds, playing a critical role in drug discovery, material science and industrial chemistry. Now, researchers from the Chinese Academy of Sciences and UCLA have revealed groundbreaking evidence that redefines the copper redox cycle underlying Ullmann reaction. Their work, published in Nature on September 22, uncovers a Cu(I)/Cu(III)/Cu(II)/Cu(III)/Cu(I) pathway — an unexpected yet elegant cycle that could reshape our understanding of copper chemistry. The Ullmann Reaction: A Legacy in Organic Synthesis The Ullmann reaction, first discovered in the early 20th century, is one of the oldest copper-catalyzed coupling reacti...

Quantum Entanglement Unveils Unique Electron Behavior in Strange Metals at Critical Point Introduction Scientists at Rice University have made a significant advancement in understanding strage metals — materials that challenge conventional laws of electricity and magnetism. Using a tool from quantum information science, their study, published in Nature Communications , shows that electrons in these metals become increasingly entangled at a critical threshold. This breakthrough could lead to new insights into superconductors, potentially revolutionizing energy technologies. Strange Metals and Their Intricate Behaviors The Challenge of Understanding Strange Metals Strange metals, unlike conventional conductors such as copper and gold, exhibit highly intricate behaviors that elude standard theoretical frameworks. To investigate this complexity, a team led by Qimiao Si, the Harry C, and Olga K, Wiess Professor of Physics and Astronomy, utilized Quantum Fisher Information (QFI), a quantum ...