The pKa [p.k.a.] of deprotonation [dee-pro-tun-AY-shun] for most primary amines [ah-MEENS] is between 35 and 45. Which of the following is closest to the pKa of cyanamide [sigh-ANN-ah-mide], a primary amine in which the R group is a cyano group?

W) 1

X) 15

Y) 35

Z) 45
W) 1