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

using model chemistry: MP2/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at MP2/STO-3G
 hartrees
Energy at 0K-191.884861
Energy at 298.15K 
HF Energy-191.610427
Nuclear repulsion energy176.933802
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 MP2/STO-3G
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' 3484 3038 0.00      
2 A1' 3403 2967 0.00      
3 A1' 1739 1516 0.00      
4 A1' 1256 1095 0.00      
5 A1' 1010 881 0.00      
6 A1" 1133 987 0.00      
7 A2' 3542 3088 0.00      
8 A2' 1048 914 0.00      
9 A2" 3474 3029 6.33      
10 A2" 1447 1262 5.93      
11 A2" 976 851 0.04      
12 E' 3545 3091 9.59      
12 E' 3545 3091 9.59      
13 E' 3406 2970 5.91      
13 E' 3406 2970 5.91      
14 E' 1707 1488 3.62      
14 E' 1707 1488 3.62      
15 E' 1425 1243 0.94      
15 E' 1425 1243 0.94      
16 E' 1213 1057 0.80      
16 E' 1213 1057 0.80      
17 E' 1017 887 0.78      
17 E' 1017 887 0.78      
18 E' 577 503 0.27      
18 E' 577 503 0.27      
19 E" 1344 1172 0.00      
19 E" 1344 1172 0.00      
20 E" 1324 1155 0.00      
20 E" 1324 1155 0.00      
21 E" 1140 994 0.00      
21 E" 1140 994 0.00      
22 E" 928 809 0.00      
22 E" 928 809 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 28882.2 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 25182.4 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 MP2/STO-3G
ABC
0.23378 0.23378 0.20394

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.961
C2 0.000 1.251 0.000
C3 1.084 -0.626 0.000
C4 -1.084 -0.626 0.000
C5 0.000 0.000 -0.961
H6 0.000 0.000 2.067
H7 0.000 0.000 -2.067
H8 0.913 1.874 0.000
H9 -0.913 1.874 0.000
H10 1.166 -1.728 0.000
H11 2.079 -0.146 0.000
H12 -2.079 -0.146 0.000
H13 -1.166 -1.728 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.57791.57791.57791.92211.10623.02832.29542.29542.29542.29542.29542.2954
C21.57792.16762.16761.57792.41662.41661.10521.10523.19942.50542.50543.1994
C31.57792.16762.16761.57792.41662.41662.50543.19941.10521.10523.19942.5054
C41.57792.16762.16761.57792.41662.41663.19942.50542.50543.19941.10521.1052
C51.92211.57791.57791.57793.02831.10622.29542.29542.29542.29542.29542.2954
H61.10622.41662.41662.41663.02834.13462.93582.93582.93582.93582.93582.9358
H73.02832.41662.41662.41661.10624.13462.93582.93582.93582.93582.93582.9358
H82.29541.10522.50543.19942.29542.93582.93581.82643.61062.33253.61064.1589
H92.29541.10523.19942.50542.29542.93582.93581.82644.15893.61062.33253.6106
H102.29543.19941.10522.50542.29542.93582.93583.61064.15891.82643.61062.3325
H112.29542.50541.10523.19942.29542.93582.93582.33253.61061.82644.15893.6106
H122.29542.50543.19941.10522.29542.93582.93583.61062.33253.61064.15891.8264
H132.29543.19942.50541.10522.29542.93582.93584.15893.61062.33253.61061.8264

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 75.044 C1 C2 H8 116.532
C1 C2 H9 116.532 C1 C3 C5 75.044
C1 C3 H10 116.532 C1 C3 H11 116.532
C1 C4 C5 75.044 C1 C4 H12 116.532
C1 C4 H13 116.532 C2 C1 C3 86.764
C2 C1 C4 86.764 C2 C1 H6 127.522
C2 C5 C3 86.764 C2 C5 C4 86.764
C2 C5 H7 127.522 C3 C1 C4 86.764
C3 C1 H6 127.522 C3 C5 C4 86.764
C3 C5 H7 127.522 C4 C1 H6 127.522
C4 C5 H7 127.522 C5 C2 H8 116.532
C5 C2 H9 116.532 C5 C3 H10 116.532
C5 C3 H11 116.532 C5 C4 H12 116.532
C5 C4 H13 116.532 H8 C2 H9 111.442
H10 C3 H11 111.443 H12 C4 H13 111.443
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability