42. Приведенная структурную формулу одного изомера и одного гомолога для этого вещества

The given compound is 2-methylbut-2-ene (C5H10). An isomer with the same molecular formula (C5H10) but a different structure could be pent-1-ene, pent-2-ene, 3-methylbut-1-ene, or cyclopentane. A homolog would have one more -CH2- group, such as hex-2-ene (C6H12). The reaction shown is the addition of H2 across the double bond, which is hydrogenation, leading to 2-methylbutane.

Answer: Изомер: пент-1-ен (C5H10). Гомолог: гекс-2-ен (C6H12). Реакция: гидрирование.