return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C(CH3)3 (Tert-butyl radical)

using model chemistry: CCD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 2A"
Energy calculated at CCD/6-31G*
 hartrees
Energy at 0K-157.229078
Energy at 298.15K-157.237685
HF Energy-156.674166
Nuclear repulsion energy125.059005
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CCD/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3102 2936 51.53      
2 A1 3016 2855 45.45      
3 A1 1546 1463 17.70      
4 A1 1480 1401 1.38      
5 A1 1149 1088 0.01      
6 A1 786 744 0.87      
7 A1 275 260 3.47      
8 A2 3142 2974 0.00      
9 A2 1531 1449 0.00      
10 A2 997 943 0.00      
11 A2 154 146 0.00      
12 E 3147 2979 42.26      
12 E 3147 2979 42.26      
13 E 3100 2934 11.98      
13 E 3100 2934 11.98      
14 E 3009 2848 26.84      
14 E 3009 2848 26.84      
15 E 1551 1468 3.08      
15 E 1551 1468 3.08      
16 E 1528 1447 2.85      
16 E 1528 1447 2.85      
17 E 1460 1382 6.04      
17 E 1460 1382 6.04      
18 E 1346 1274 4.32      
18 E 1346 1274 4.32      
19 E 1043 987 2.38      
19 E 1043 987 2.38      
20 E 972 920 0.16      
20 E 972 920 0.16      
21 E 386 365 0.05      
21 E 386 365 0.05      
22 E 156 147 0.00      
22 E 156 147 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26285.5 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 24879.2 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CCD/6-31G*
ABC
0.26596 0.26596 0.14464

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.182
C2 0.000 1.486 -0.020
C3 1.287 -0.743 -0.020
C4 -1.287 -0.743 -0.020
H5 0.000 1.750 -1.093
H6 1.515 -0.875 -1.093
H7 -1.515 -0.875 -1.093
H8 -0.889 1.951 0.425
H9 0.889 1.951 0.425
H10 2.134 -0.205 0.425
H11 1.245 -1.745 0.425
H12 -1.245 -1.745 0.425
H13 -2.134 -0.205 0.425

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
C11.49981.49981.49982.16542.16542.16542.15732.15732.15732.15732.15732.1573
C21.49982.57402.57401.10503.00373.00371.09741.09742.75893.49133.49132.7589
C31.49982.57402.57403.00371.10503.00373.49132.75891.09741.09742.75893.4913
C41.49982.57402.57403.00373.00371.10502.75893.49133.49132.75891.09741.0974
H52.16541.10503.00373.00373.03073.03071.77071.77073.26804.00864.00863.2680
H62.16543.00371.10503.00373.03073.03074.00863.26801.77071.77073.26804.0086
H72.16543.00373.00371.10503.03073.03073.26804.00864.00863.26801.77071.7707
H82.15731.09743.49132.75891.77074.00863.26801.77833.71294.26763.71292.4893
H92.15731.09742.75893.49131.77073.26804.00861.77832.48933.71294.26763.7129
H102.15732.75891.09743.49133.26801.77074.00863.71292.48931.77833.71294.2676
H112.15733.49131.09742.75894.00861.77073.26804.26763.71291.77832.48933.7129
H122.15733.49132.75891.09744.00863.26801.77073.71294.26763.71292.48931.7783
H132.15732.75893.49131.09743.26804.00861.77072.48933.71294.26763.71291.7783

picture of Tert-butyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 111.566 C1 C2 H8 111.383
C1 C2 H9 111.383 C1 C3 H6 111.566
C1 C3 H10 111.383 C1 C3 H11 111.383
C1 C4 H7 111.566 C1 C4 H12 111.383
C1 C4 H13 111.383 C2 C1 C3 118.206
C2 C1 C4 118.206 C3 C1 C4 118.206
H5 C2 H8 107.022 H5 C2 H9 107.022
H6 C3 H10 107.022 H6 C3 H11 107.022
H7 C4 H12 107.022 H7 C4 H13 107.022
H8 C2 H9 108.240 H10 C3 H11 108.240
H12 C4 H13 108.240
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability