I don't know if these were the officers at organization or not, but here's a start:

1st Regiment Arkansas Volunteer Infantry (African Descent) later the 46th U.S. Colored Troops - Col. William Wood
2nd Regiment Arkansas Volunteer Infantry (African Descent) later the 54th U. S. Colored Troops - Col. John E. Cone
3rd Regiment Arkansas Volunteer Infantry (African Descent) later the 56th U.S. Colored Troops - Col. Wm. S. Brooks (was a lieutenant in the 19th Iowa here at Prairie Grove and was wounded after saving the regimental colors, his uniform having 18 bullet holes through it. He was the brother of Joseph Brooks of Brooks-Baxter War fame). Was KIA at Big Creek near Helena.
4th Regiment Arkansas Volunteer Infantry (African Descent) later the 57th U.S. Colored Troops - Col. Thomas D. Seawell
5th Regiment Arkansas Volunteer Infantry (African Descent) later the 112th U.S. Colored Troops - LtCol. John G. Gustafson
6th Regiment Arkansas Volunteer Infantry (African Descent) later the 113th U.S. Colored Troops - LtCol. Lawriston W. Whipple
1st Battery, Arkansas Light Artillery (African Descent) later the Battery "H," 2nd U.S. Colored Light Artillery - Capt. John Driscoll