Journal Article DFT calculations Research Support, Non-U.S. Gov't 56HH86ZVCT Uracil nitrogen bases 1,1-ethenediol 1,2-ethenediol 59X161SCYL Ions Lewis acidity Mg and Be clusters Protons Se-S bridge Selenium Compounds Sulfur Compounds Thiouracil acidity acidity and basicity basicity bond cleavage clusters density functional theory (DFT) electronic reaction flux electron‐deficient compounds fluoride abstraction hydride abstraction hydrogen transfer intrinsic basicity intrinsic reactivity