Its empirical formula is c 2 h 3 more generally a vinylic cation is any disubstituted trivalent carbon where the carbon bearing the positive charge is part of a double bond and is sp hybridized in the chemical literature substituted vinylic cations are often referred to as vinyl cations and understood to. An allylic carbon is an sp3 carbon that is adjacent to a vinylic carbon. A vinyl cation is a positively charged molecule a cation where the positive charge is located on a vinyl group ch ch2.
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