Combine first four ingredients in a saucepan over medium heat; cook, stirring occasionally, until sugar melts and flavors are blended, about 10 minutes. Arrange chicken in a shallow pan, placing half slices of lemon between and around chicken. Pour sauce over all, cover tightly with foil, and bake at 350 for 1 hour. Remove foil, spoon juices over chicken, and continue baking until well done (30 minutes or so). Serve with rice and pass the sauce.
