Answer

  1. 2, 3-dimethyl-4-oxo pent-2-en-oic acid.
  2. 1, 3, 3-trimethyl cyclohex-1-ene.

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A reaction between ammonia and boron trifluoride is given below:
$
: NH_3+B F_3 \rightarrow H_3 N: BF_3
$
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