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All results from a given calculation for C5H8 (Bicyclo[2.1.0]pentane)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-193.286541
Energy at 298.15K-193.295726
HF Energy-192.838013
Nuclear repulsion energy173.688338
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 MP2/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3277 3117 17.55      
2 A' 3258 3099 1.46      
3 A' 3184 3029 35.20      
4 A' 3168 3013 11.66      
5 A' 3117 2965 34.16      
6 A' 1586 1509 1.37      
7 A' 1558 1482 2.99      
8 A' 1374 1307 0.24      
9 A' 1269 1207 2.96      
10 A' 1234 1174 0.60      
11 A' 1128 1073 2.54      
12 A' 1057 1006 0.36      
13 A' 987 939 9.75      
14 A' 965 918 0.37      
15 A' 892 848 1.63      
16 A' 795 757 1.60      
17 A' 745 709 6.67      
18 A' 432 411 0.84      
19 A" 3258 3099 11.00      
20 A" 3165 3011 0.03      
21 A" 3108 2956 32.06      
22 A" 1567 1491 0.42      
23 A" 1322 1257 4.11      
24 A" 1314 1250 5.70      
25 A" 1266 1205 0.33      
26 A" 1171 1114 3.75      
27 A" 1140 1084 4.63      
28 A" 1119 1064 0.46      
29 A" 1001 953 3.45      
30 A" 945 899 0.51      
31 A" 778 740 13.34      
32 A" 699 665 0.10      
33 A" 258 245 0.30      

Unscaled Zero Point Vibrational Energy (zpe) 26066.5 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 24797.1 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 MP2/3-21G*
ABC
0.29315 0.20003 0.15581

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.254 -0.555 0.785
C2 -0.254 -0.555 -0.785
C3 -0.254 1.002 0.799
C4 -0.254 1.002 -0.799
C5 0.968 -1.036 0.000
H6 -0.788 -1.192 1.474
H7 -0.788 -1.192 -1.474
H8 0.609 1.465 1.287
H9 0.609 1.465 -1.287
H10 -1.180 1.423 1.197
H11 -1.180 1.423 -1.197
H12 1.874 -0.436 0.000
H13 1.128 -2.109 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.56911.55712.22111.52971.08032.40682.25333.01922.22322.94942.27112.2232
C21.56912.22111.55711.52972.40681.08033.01922.25332.94942.22322.27112.2232
C31.55712.22111.59872.50692.35703.20451.09392.30461.09282.24092.68973.4973
C42.22111.55711.59872.50693.20452.35702.30461.09392.24091.09282.68973.4973
C51.52971.52972.50692.50692.29832.29832.83512.83513.47803.47801.08651.0858
H61.08032.40682.35703.20452.29832.94813.00804.07872.65933.75893.13572.5860
H72.40681.08033.20452.35702.29832.94814.07873.00803.75892.65933.13572.5860
H82.25333.01921.09392.30462.83513.00804.07872.57371.79243.06172.62083.8344
H93.01922.25332.30461.09392.83514.07873.00802.57373.06171.79242.62083.8344
H102.22322.94941.09282.24093.47802.65933.75891.79243.06172.39393.77094.3869
H112.94942.22322.24091.09283.47803.75892.65933.06171.79242.39393.77094.3869
H122.27112.27112.68972.68971.08653.13573.13572.62082.62083.77093.77091.8324
H132.22322.22323.49733.49731.08582.58602.58603.83443.83444.38694.38691.8324

picture of Bicyclo[2.1.0]pentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 90.544 C1 C2 C5 59.143
C1 C2 H7 129.660 C1 C3 C4 89.456
C1 C3 H8 115.300 C1 C3 H10 112.890
C1 C5 C2 61.714 C1 C5 H12 119.513
C1 C5 H13 115.376 C2 C1 C3 90.544
C2 C1 C5 59.143 C2 C1 H6 129.660
C2 C4 C3 89.456 C2 C4 H9 115.300
C2 C4 H11 112.890 C2 C5 H12 119.513
C2 C5 H13 115.376 C3 C1 C5 108.606
C3 C1 H6 125.717 C3 C4 H9 116.463
C3 C4 H11 111.336 C4 C2 C5 108.606
C4 C2 H7 125.717 C4 C3 H8 116.463
C4 C3 H10 111.336 C5 C1 H6 122.493
C5 C2 H7 122.493 H8 C3 H10 110.100
H9 C4 H11 110.100 H12 C5 H13 115.032
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability