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

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 2A"
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-156.210875
Energy at 298.15K-156.219437
HF Energy-155.807290
Nuclear repulsion energy123.879175
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 QCISD/3-21G
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 3038 2945 43.81      
2 A1 2959 2868 46.71      
3 A1 1570 1522 17.77      
4 A1 1487 1441 0.86      
5 A1 1157 1122 0.41      
6 A1 721 699 0.62      
7 A1 250 242 4.36      
8 A2 3071 2976 0.00      
9 A2 1557 1509 0.00      
10 A2 1016 985 0.00      
11 A2 164 159 0.00      
12 E 3077 2982 40.39      
12 E 3077 2982 40.39      
13 E 3035 2941 13.34      
13 E 3035 2941 13.34      
14 E 2953 2862 19.56      
14 E 2953 2862 19.56      
15 E 1575 1526 3.84      
15 E 1575 1526 3.84      
16 E 1553 1506 1.70      
16 E 1553 1506 1.70      
17 E 1462 1417 5.24      
17 E 1462 1417 5.24      
18 E 1298 1258 9.23      
18 E 1298 1258 9.23      
19 E 1023 991 1.36      
19 E 1023 991 1.36      
20 E 977 947 0.14      
20 E 977 947 0.14      
21 E 378 366 0.02      
21 E 378 366 0.02      
22 E 151 146 0.00      
22 E 151 146 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25975.9 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 25175.9 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 QCISD/3-21G
ABC
0.26024 0.26024 0.14149

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.189
C2 0.000 1.506 -0.022
C3 1.304 -0.753 -0.022
C4 -1.304 -0.753 -0.022
H5 0.000 1.759 -1.101
H6 1.524 -0.880 -1.101
H7 -1.524 -0.880 -1.101
H8 -0.894 1.964 0.428
H9 0.894 1.964 0.428
H10 2.148 -0.208 0.428
H11 1.254 -1.756 0.428
H12 -1.254 -1.756 0.428
H13 -2.148 -0.208 0.428

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
C11.52051.52051.52052.18122.18122.18122.17112.17112.17112.17112.17112.1711
C21.52052.60812.60811.10783.02903.02901.10081.10082.78443.52353.52352.7844
C31.52052.60812.60813.02901.10783.02903.52352.78441.10081.10082.78443.5235
C41.52052.60812.60813.02903.02901.10782.78443.52353.52352.78441.10081.1008
H52.18121.10783.02903.02903.04743.04741.78271.78273.28954.03344.03343.2895
H62.18123.02901.10783.02903.04743.04744.03343.28951.78271.78273.28954.0334
H72.18123.02903.02901.10783.04743.04743.28954.03344.03343.28951.78271.7827
H82.17111.10083.52352.78441.78274.03343.28951.78763.73744.29553.73742.5080
H92.17111.10082.78443.52351.78273.28954.03341.78762.50803.73744.29553.7374
H102.17112.78441.10083.52353.28951.78274.03343.73742.50801.78763.73744.2955
H112.17113.52351.10082.78444.03341.78273.28954.29553.73741.78762.50803.7374
H122.17113.52352.78441.10084.03343.28951.78273.73744.29553.73742.50801.7876
H132.17112.78443.52351.10083.28954.03341.78272.50803.73744.29553.73741.7876

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 111.208 C1 C2 H8 110.823
C1 C2 H9 110.823 C1 C3 H6 111.208
C1 C3 H10 110.823 C1 C3 H11 110.823
C1 C4 H7 111.208 C1 C4 H12 110.823
C1 C4 H13 110.823 C2 C1 C3 118.109
C2 C1 C4 118.109 C3 C1 C4 118.109
H5 C2 H8 107.643 H5 C2 H9 107.643
H6 C3 H10 107.643 H6 C3 H11 107.643
H7 C4 H12 107.643 H7 C4 H13 107.643
H8 C2 H9 108.570 H10 C3 H11 108.570
H12 C4 H13 108.570
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability