What is the name for the type of intermediate X formed in the reaction sequence below? 
Definitions:
Probability
An indicator of how probable an event is to happen, shown as a value ranging from 0 to 1, with 0 meaning it cannot happen and 1 meaning it will definitely happen.
Union
An organized association of workers formed to protect and further their rights and interests; a labor union.
Individual Probabilities
The likelihood of specific outcomes for individual events.
Probability Tree
A diagram that represents the possible outcomes of a series of events, showing the probability of each outcome in a branching format.
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