Which of the following is one of the steps in the mechanism of the following reaction? 
Definitions:
Mean
Calculated by dividing the total of the numbers by their quantity, the average represents the mean value of a set.
Median
The middle value in an ordered list of numbers, effectively dividing the dataset into two halves.
Central Location
The midpoint or center of a dataset where it tends to cluster around.
Sample Mean
The average of a set of numerical values drawn from a larger population, often used to estimate the population mean.
Q25: Which of the following substituent on the
Q27: Give the organic products for the reaction.
Q44: Which of the following compounds is N,N-dimethylbenzamide?
Q58: Give the best product for the following
Q75: Give the ion that corresponds to a
Q85: Predict the number of signals expected,their splitting,and
Q85: Give the systematic name of the structure.
Q88: Which of the following underlined alpha hydrogens
Q99: Which compound's α H is the least
Q112: Draw the structure of 3-bromobutanal.