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

using model chemistry: QCISD/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 QCISD/6-31G**
 hartrees
Energy at 0K-194.671230
Energy at 298.15K 
HF Energy-193.918421
Nuclear repulsion energy179.631079
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/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' 3189 3002 0.00      
2 A1' 3125 2942 0.00      
3 A1' 1609 1515 0.00      
4 A1' 1158 1090 0.00      
5 A1' 938 883 0.00      
6 A1" 1028 968 0.00      
7 A2' 3184 2997 0.00      
8 A2' 993 934 0.00      
9 A2" 3182 2996 116.89      
10 A2" 1305 1229 25.19      
11 A2" 876 824 3.74      
12 E' 3191 3004 66.26      
12 E' 3191 3004 66.26      
13 E' 3119 2936 71.23      
13 E' 3119 2936 71.23      
14 E' 1561 1469 0.06      
14 E' 1561 1469 0.06      
15 E' 1307 1230 0.80      
15 E' 1307 1230 0.80      
16 E' 1149 1082 0.81      
16 E' 1149 1082 0.81      
17 E' 933 878 0.29      
17 E' 933 878 0.29      
18 E' 558 525 0.13      
18 E' 558 525 0.13      
19 E" 1254 1181 0.00      
19 E" 1254 1181 0.00      
20 E" 1190 1120 0.00      
20 E" 1190 1120 0.00      
21 E" 1061 999 0.00      
21 E" 1061 999 0.00      
22 E" 821 772 0.00      
22 E" 821 772 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26436.2 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 24887.1 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/6-31G**
ABC
0.24150 0.24150 0.20903

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.940
C2 0.000 1.236 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 0.902 1.850 0.000
H9 -0.902 1.850 0.000
H10 1.152 -1.706 0.000
H11 2.053 -0.144 0.000
H12 -2.053 -0.144 0.000
H13 -1.152 -1.706 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55291.55291.55291.87931.08832.96772.26282.26282.26282.26282.26282.2628
C21.55292.14132.14131.55292.37512.37511.09101.09103.15982.47442.47443.1598
C31.55292.14132.14131.55292.37512.37512.47443.15981.09101.09103.15982.4744
C41.55292.14132.14131.55292.37512.37513.15982.47442.47443.15981.09101.0910
C51.87931.55291.55291.55292.96771.08832.26282.26282.26282.26282.26282.2628
H61.08832.37512.37512.37512.96774.05602.88972.88972.88972.88972.88972.8897
H72.96772.37512.37512.37511.08834.05602.88972.88972.88972.88972.88972.8897
H82.26281.09102.47443.15982.26282.88972.88971.80343.56542.30343.56544.1068
H92.26281.09103.15982.47442.26282.88972.88971.80344.10683.56542.30343.5654
H102.26283.15981.09102.47442.26282.88972.88973.56544.10681.80343.56542.3034
H112.26282.47441.09103.15982.26282.88972.88972.30343.56541.80344.10683.5654
H122.26282.47443.15981.09102.26282.88972.88973.56542.30343.56544.10681.8034
H132.26283.15982.47441.09102.26282.88972.88974.10683.56542.30343.56541.8034

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 74.474 C1 C2 H8 116.626
C1 C2 H9 116.626 C1 C3 C5 74.474
C1 C3 H10 116.626 C1 C3 H11 116.626
C1 C4 C5 74.474 C1 C4 H12 116.626
C1 C4 H13 116.626 C2 C1 C3 87.177
C2 C1 C4 87.177 C2 C1 H6 127.237
C2 C5 C3 87.177 C2 C5 C4 87.177
C2 C5 H7 127.237 C3 C1 C4 87.177
C3 C1 H6 127.237 C3 C5 C4 87.177
C3 C5 H7 127.237 C4 C1 H6 127.237
C4 C5 H7 127.237 C5 C2 H8 116.626
C5 C2 H9 116.626 C5 C3 H10 116.626
C5 C3 H11 116.626 C5 C4 H12 116.626
C5 C4 H13 116.626 H8 C2 H9 111.482
H10 C3 H11 111.482 H12 C4 H13 111.482
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability