How strong a base would you expect a Grignard reagent to be? Look at Table 8.1, and then predict whether the following reactions will occur as written.?(The pKa of NH₃ is 35.)

(a) CH₃MgBr + H ? C ? C ? H ? CH₄ + H ? C ? C ? MgBr

(b) CH₃MgBr + NH₃ ? CH₄ + H₂N ? MgBr

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Acidity of Simple Hydrocarbons Table 8.1 Family Example K, pK, НС— СН 10-25 Alkyne 25 Stronger acid 10-44 Alkene H2C=CH2 44 Weaker 10-60 CH4 Alkane 60 acid