Timothy W. McCorquodale was electrocuted in Jackson, Ga., for the 1974 torture-murder of a teen-age girl. He was the fifth man to be executed in Georgia this year. McCorquodale, 35, was convicted of raping, torturing and then breaking the neck of Donna Marie Dixon, a 17-year-old runaway from Newport News, Va. Witnesses at his trial said McCorquodale became enraged when he saw Dixon speaking with a black man in an Atlanta bar. McCorquodale and the victim were white.