Place the chicken in a large bowl. Combine remaining ingredients and coat chicken. Refrigerate, covered, for 2 to 4 hours.
Remove chicken 30 minutes before cooking. Preheat oven to 375°F. Arrange chicken in a shallow roasting pan. Pour 2/3 cup of the marinade into the pan.
Bake chicken, basting frequently, for 1 hour.
Transfer to a platter. Strain pan juices into a small saucepan and boil until thickened, about 10 minutes. Drizzle sauce over the chicken and sprinkle with scallions.