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

using model chemistry: CISD/3-21G*

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/3-21G*
 hartrees
Energy at 0K-193.254096
Energy at 298.15K 
HF Energy-192.825105
Nuclear repulsion energy176.992125
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/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' 3247 3034 0.00      
2 A1' 3152 2946 0.00      
3 A1' 1628 1521 0.00      
4 A1' 1149 1073 0.00      
5 A1' 970 906 0.00      
6 A1" 1057 987 0.00      
7 A2' 3213 3002 0.00      
8 A2' 986 921 0.00      
9 A2" 3233 3021 74.39      
10 A2" 1312 1226 37.62      
11 A2" 832 778 6.73      
12 E' 3220 3009 45.32      
12 E' 3220 3009 45.32      
13 E' 3145 2939 50.61      
13 E' 3145 2939 50.61      
14 E' 1585 1481 0.63      
14 E' 1585 1481 0.63      
15 E' 1303 1218 1.99      
15 E' 1303 1218 1.99      
16 E' 1150 1075 0.14      
16 E' 1150 1075 0.14      
17 E' 903 844 1.13      
17 E' 903 844 1.13      
18 E' 566 529 0.18      
18 E' 566 529 0.18      
19 E" 1301 1216 0.00      
19 E" 1301 1216 0.00      
20 E" 1208 1129 0.00      
20 E" 1208 1129 0.00      
21 E" 1105 1033 0.00      
21 E" 1105 1033 0.00      
22 E" 779 728 0.00      
22 E" 779 728 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26656.4 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 24907.8 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/3-21G*
ABC
0.23334 0.23334 0.20324

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.964
C2 0.000 1.258 0.000
C3 1.090 -0.629 0.000
C4 -1.090 -0.629 0.000
C5 0.000 0.000 -0.964
H6 0.000 0.000 2.047
H7 0.000 0.000 -2.047
H8 0.906 1.862 0.000
H9 -0.906 1.862 0.000
H10 1.160 -1.716 0.000
H11 2.066 -0.146 0.000
H12 -2.066 -0.146 0.000
H13 -1.160 -1.716 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.58541.58541.58541.92901.08273.01172.28482.28482.28482.28482.28482.2848
C21.58542.17942.17941.58542.40302.40301.08931.08933.19262.49832.49833.1926
C31.58542.17942.17941.58542.40302.40302.49833.19261.08931.08933.19262.4983
C41.58542.17942.17941.58542.40302.40303.19262.49832.49833.19261.08931.0893
C51.92901.58541.58541.58543.01171.08272.28482.28482.28482.28482.28482.2848
H61.08272.40302.40302.40303.01174.09432.91222.91222.91222.91222.91222.9122
H73.01172.40302.40302.40301.08274.09432.91222.91222.91222.91222.91222.9122
H82.28481.08932.49833.19262.28482.91222.91221.81293.58752.31943.58754.1322
H92.28481.08933.19262.49832.28482.91222.91221.81294.13223.58752.31943.5875
H102.28483.19261.08932.49832.28482.91222.91223.58754.13221.81293.58752.3194
H112.28482.49831.08933.19262.28482.91222.91222.31943.58751.81294.13223.5875
H122.28482.49833.19261.08932.28482.91222.91223.58752.31943.58754.13221.8129
H132.28483.19262.49831.08932.28482.91222.91224.13223.58752.31943.58751.8129

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 74.940 C1 C2 H8 116.114
C1 C2 H9 116.114 C1 C3 C5 74.940
C1 C3 H10 116.114 C1 C3 H11 116.114
C1 C4 C5 74.940 C1 C4 H12 116.114
C1 C4 H13 116.114 C2 C1 C3 86.840
C2 C1 C4 86.840 C2 C1 H6 127.470
C2 C5 C3 86.840 C2 C5 C4 86.840
C2 C5 H7 127.470 C3 C1 C4 86.840
C3 C1 H6 127.470 C3 C5 C4 86.840
C3 C5 H7 127.470 C4 C1 H6 127.470
C4 C5 H7 127.470 C5 C2 H8 116.114
C5 C2 H9 116.114 C5 C3 H10 116.114
C5 C3 H11 116.114 C5 C4 H12 116.114
C5 C4 H13 116.114 H8 C2 H9 112.636
H10 C3 H11 112.636 H12 C4 H13 112.636
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability