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

using model chemistry: CCD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at CCD/6-31G(2df,p)
 hartrees
Energy at 0K-194.771226
Energy at 298.15K 
HF Energy-193.928945
Nuclear repulsion energy179.606251
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(2df,p)
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' 3179 3011 0.00      
2 A1' 3116 2951 0.00      
3 A1' 1584 1501 0.00      
4 A1' 1153 1092 0.00      
5 A1' 932 883 0.00      
6 A1" 1023 969 0.00      
7 A2' 3178 3011 0.00      
8 A2' 974 923 0.00      
9 A2" 3173 3006 90.19      
10 A2" 1295 1226 27.59      
11 A2" 880 834 4.49      
12 E' 3184 3016 47.47      
12 E' 3184 3016 47.47      
13 E' 3111 2947 56.75      
13 E' 3111 2947 56.75      
14 E' 1532 1451 0.11      
14 E' 1532 1451 0.11      
15 E' 1302 1233 1.08      
15 E' 1302 1233 1.08      
16 E' 1139 1079 0.36      
16 E' 1139 1079 0.36      
17 E' 937 888 0.36      
17 E' 937 888 0.36      
18 E' 551 522 0.28      
18 E' 551 522 0.28      
19 E" 1242 1177 0.00      
19 E" 1242 1177 0.00      
20 E" 1184 1122 0.00      
20 E" 1184 1122 0.00      
21 E" 1054 998 0.00      
21 E" 1054 998 0.00      
22 E" 823 780 0.00      
22 E" 823 780 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26303.1 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 24914.3 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(2df,p)
ABC
0.24145 0.24145 0.20895

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.940
C2 0.000 1.237 0.000
C3 1.071 -0.618 0.000
C4 -1.071 -0.618 0.000
C5 0.000 0.000 -0.940
H6 0.000 0.000 2.028
H7 0.000 0.000 -2.028
H8 0.903 1.850 0.000
H9 -0.903 1.850 0.000
H10 1.151 -1.707 0.000
H11 2.053 -0.143 0.000
H12 -2.053 -0.143 0.000
H13 -1.151 -1.707 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55321.55321.55321.87941.08792.96732.26272.26272.26272.26272.26272.2627
C21.55322.14192.14191.55322.37502.37501.09141.09143.16032.47382.47383.1603
C31.55322.14192.14191.55322.37502.37502.47383.16031.09141.09143.16032.4738
C41.55322.14192.14191.55322.37502.37503.16032.47382.47383.16031.09141.0914
C51.87941.55321.55321.55322.96731.08792.26272.26272.26272.26272.26272.2627
H61.08792.37502.37502.37502.96734.05522.88932.88932.88932.88932.88932.8893
H72.96732.37502.37502.37501.08794.05522.88932.88932.88932.88932.88932.8893
H82.26271.09142.47383.16032.26272.88932.88931.80583.56522.30113.56524.1068
H92.26271.09143.16032.47382.26272.88932.88931.80584.10683.56522.30113.5652
H102.26273.16031.09142.47382.26272.88932.88933.56524.10681.80583.56522.3011
H112.26272.47381.09143.16032.26272.88932.88932.30113.56521.80584.10683.5652
H122.26272.47383.16031.09142.26272.88932.88933.56522.30113.56524.10681.8058
H132.26273.16032.47381.09142.26272.88932.88934.10683.56522.30113.56521.8058

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 74.460 C1 C2 H8 116.571
C1 C2 H9 116.571 C1 C3 C5 74.460
C1 C3 H10 116.571 C1 C3 H11 116.571
C1 C4 C5 74.460 C1 C4 H12 116.571
C1 C4 H13 116.571 C2 C1 C3 87.188
C2 C1 C4 87.188 C2 C1 H6 127.230
C2 C5 C3 87.188 C2 C5 C4 87.188
C2 C5 H7 127.230 C3 C1 C4 87.188
C3 C1 H6 127.230 C3 C5 C4 87.188
C3 C5 H7 127.230 C4 C1 H6 127.230
C4 C5 H7 127.230 C5 C2 H8 116.571
C5 C2 H9 116.571 C5 C3 H10 116.571
C5 C3 H11 116.571 C5 C4 H12 116.571
C5 C4 H13 116.571 H8 C2 H9 111.640
H10 C3 H11 111.640 H12 C4 H13 111.640
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability