How to change one column in row?

arisenUA

 $('#newprod_table tbody').on('click', '#select', function () {
         $($(this).parents('tr').css('background-color', 'Red'); //its change whole row
                    $($(this).parents('tr th:nth-child(2)')).css('background-color', 'Red'); //this doesn't work. But why?
                  });