Explain why 2,2,5,5-tetramethylhex-3-yne can't be made using acetylide anions. a. It would form the substitution product.
b. The 1 degree alkyl halide is too crowded for nucleophilic substitution.
c. It has a terminal alkyne. It has an internal alkyne.
d. The 2 degree alkyl halide is too crowded for nucleophilic substitution.
e. The 3 degree alkyl halide is too crowded for nucleophilic substitution.

Select the correct value for the indicated bond angle in each of the compounds. o−o−oo−o−o angle of o3 90° 109.5° < 109.5° 120° < 120° 180° f−b−ff−b−f angle of bf3 180° < 109.5° < 120° 120° 109.5° 90° f−o−ff−o−f angle of of2 < 120° 120° 90° 109.5° 180° < 109.5° cl−be−clcl−be−cl angle of becl2 90° 109.5° 180° 120° < 109.5° < 120° f−p−ff−p−f angle of pf3 90° 109.5° < 109.5° 180° 120° < 120° h−c−hh−c−h angle of ch4 90° < 109.5° 180° 120° < 120° 109.5°