Correct sequence! Here is the breakdown of each compound in the sequence:

Етан (C2H6) - Ethane, a saturated hydrocarbon with two carbon atoms bonded to six hydrogen atoms.Етилен (C2H4) - Ethylene, an unsaturated hydrocarbon with two carbon atoms bonded by a double bond and two hydrogen atoms attached to each carbon.Етанол (C2H5OH) - Ethanol, a simple alcohol with two carbon atoms, five hydrogen atoms, and a hydroxyl group (-OH) attached to one of the carbons.Етен (C2H2) - Ethyne, also known as acetylene, a hydrocarbon with two carbon atoms bonded by a triple bond and two hydrogen atoms attached to each carbon.Диброметан (CH2Br2) - Dibromomethane, a halogenated hydrocarbon with two bromine atoms attached to a methane (CH4) molecule.

Overall, your sequence represents a series of chemical transformations starting from a simple hydrocarbon (ethane) and progressing through various intermediate compounds to end with a halogenated hydrocarbon. Well done!