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All results from a given calculation for C5H8 (Bicyclo[1.1.1]pentane)

using model chemistry: CISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at CISD/6-31G*
 hartrees
Energy at 0K-194.491474
Energy at 298.15K 
HF Energy-193.905531
Nuclear repulsion energy180.327230
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 CISD/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' 3234 2994 0.00      
2 A1' 3175 2940 0.00      
3 A1' 1647 1525 0.00      
4 A1' 1190 1102 0.00      
5 A1' 963 891 0.00      
6 A1" 1053 975 0.00      
7 A2' 3228 2988 0.00      
8 A2' 1020 944 0.00      
9 A2" 3227 2988 118.78      
10 A2" 1349 1249 33.04      
11 A2" 907 840 5.71      
12 E' 3235 2995 67.16      
12 E' 3235 2995 67.16      
13 E' 3169 2934 70.01      
13 E' 3169 2934 70.01      
14 E' 1597 1478 0.06      
14 E' 1597 1478 0.06      
15 E' 1347 1247 1.20      
15 E' 1347 1247 1.20      
16 E' 1179 1092 0.43      
16 E' 1179 1092 0.43      
17 E' 962 891 0.66      
17 E' 962 891 0.66      
18 E' 577 534 0.27      
18 E' 577 534 0.27      
19 E" 1289 1193 0.00      
19 E" 1289 1193 0.00      
20 E" 1229 1138 0.00      
20 E" 1229 1138 0.00      
21 E" 1087 1007 0.00      
21 E" 1087 1007 0.00      
22 E" 849 786 0.00      
22 E" 849 786 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 27016.0 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 25011.4 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 CISD/6-31G*
ABC
0.24354 0.24354 0.21064

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.935
C2 0.000 1.231 0.000
C3 1.066 -0.615 0.000
C4 -1.066 -0.615 0.000
C5 0.000 0.000 -0.935
H6 0.000 0.000 2.022
H7 0.000 0.000 -2.022
H8 0.899 1.846 0.000
H9 -0.899 1.846 0.000
H10 1.150 -1.702 0.000
H11 2.049 -0.145 0.000
H12 -2.049 -0.145 0.000
H13 -1.150 -1.702 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.54531.54531.54531.86921.08762.95682.25632.25632.25632.25632.25632.2563
C21.54532.13172.13171.54532.36722.36721.08971.08973.14982.46742.46743.1498
C31.54532.13172.13171.54532.36722.36722.46743.14981.08971.08973.14982.4674
C41.54532.13172.13171.54532.36722.36723.14982.46742.46743.14981.08971.0897
C51.86921.54531.54531.54532.95681.08762.25632.25632.25632.25632.25632.2563
H61.08762.36722.36722.36722.95684.04442.88212.88212.88212.88212.88212.8821
H72.95682.36722.36722.36721.08764.04442.88212.88212.88212.88212.88212.8821
H82.25631.08972.46743.14982.25632.88212.88211.79813.55702.29903.55704.0971
H92.25631.08973.14982.46742.25632.88212.88211.79814.09713.55702.29903.5570
H102.25633.14981.08972.46742.25632.88212.88213.55704.09711.79813.55702.2990
H112.25632.46741.08973.14982.25632.88212.88212.29903.55701.79814.09713.5570
H122.25632.46743.14981.08972.25632.88212.88213.55702.29903.55704.09711.7981
H132.25633.14982.46741.08972.25632.88212.88214.09713.55702.29903.55701.7981

picture of Bicyclo[1.1.1]pentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 74.425 C1 C2 H8 116.743
C1 C2 H9 116.743 C1 C3 C5 74.425
C1 C3 H10 116.743 C1 C3 H11 116.743
C1 C4 C5 74.425 C1 C4 H12 116.743
C1 C4 H13 116.743 C2 C1 C3 87.213
C2 C1 C4 87.213 C2 C1 H6 127.212
C2 C5 C3 87.213 C2 C5 C4 87.213
C2 C5 H7 127.212 C3 C1 C4 87.213
C3 C1 H6 127.212 C3 C5 C4 87.213
C3 C5 H7 127.212 C4 C1 H6 127.212
C4 C5 H7 127.212 C5 C2 H8 116.743
C5 C2 H9 116.743 C5 C3 H10 116.743
C5 C3 H11 116.743 C5 C4 H12 116.743
C5 C4 H13 116.743 H8 C2 H9 111.192
H10 C3 H11 111.192 H12 C4 H13 111.192
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability