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

using model chemistry: MP2=FULL/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=FULL/3-21G
 hartrees
Energy at 0K-193.294987
Energy at 298.15K-193.304188
HF Energy-192.838069
Nuclear repulsion energy173.724759
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=FULL/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' 3278 3129 17.37      
2 A' 3259 3111 1.49      
3 A' 3185 3041 35.03      
4 A' 3168 3025 11.59      
5 A' 3117 2976 34.01      
6 A' 1586 1515 1.39      
7 A' 1558 1487 3.02      
8 A' 1374 1312 0.23      
9 A' 1270 1212 2.97      
10 A' 1234 1178 0.61      
11 A' 1129 1078 2.56      
12 A' 1058 1010 0.37      
13 A' 988 943 9.72      
14 A' 966 922 0.39      
15 A' 892 851 1.63      
16 A' 795 759 1.60      
17 A' 746 712 6.68      
18 A' 432 413 0.84      
19 A" 3259 3112 10.89      
20 A" 3165 3022 0.03      
21 A" 3108 2968 31.92      
22 A" 1567 1496 0.44      
23 A" 1322 1262 4.16      
24 A" 1314 1255 5.71      
25 A" 1266 1209 0.33      
26 A" 1171 1118 3.80      
27 A" 1140 1089 4.60      
28 A" 1119 1069 0.47      
29 A" 1002 956 3.45      
30 A" 945 902 0.50      
31 A" 778 743 13.34      
32 A" 699 667 0.10      
33 A" 258 246 0.30      

Unscaled Zero Point Vibrational Energy (zpe) 26073.2 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 24894.7 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=FULL/3-21G
ABC
0.29324 0.20013 0.15589

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.254 -0.555 0.784
C2 -0.254 -0.555 -0.784
C3 -0.254 1.002 0.799
C4 -0.254 1.002 -0.799
C5 0.968 -1.035 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 -0.435 0.000
H13 1.129 -2.109 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.56881.55682.22061.52931.08012.40642.25283.01862.22292.94892.27062.2229
C21.56882.22061.55681.52932.40641.08013.01862.25282.94892.22292.27062.2229
C31.55682.22061.59842.50612.35663.20391.09382.30421.09272.24052.68873.4965
C42.22061.55681.59842.50613.20392.35662.30421.09382.24051.09272.68873.4965
C51.52931.52932.50612.50612.29802.29802.83422.83423.47723.47721.08641.0856
H61.08012.40642.35663.20392.29802.94773.00744.07792.65903.75843.13522.5858
H72.40641.08013.20392.35662.29802.94774.07793.00743.75842.65903.13522.5858
H82.25283.01861.09382.30422.83423.00744.07792.57321.79213.06122.61963.8333
H93.01862.25282.30421.09382.83424.07793.00742.57323.06121.79212.61963.8333
H102.22292.94891.09272.24053.47722.65903.75841.79213.06122.39363.76984.3861
H112.94892.22292.24051.09273.47723.75842.65903.06121.79212.39363.76984.3861
H122.27062.27062.68872.68871.08643.13523.13522.61962.61963.76983.76981.8321
H132.22292.22293.49653.49651.08562.58582.58583.83333.83334.38614.38611.8321

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 90.545 C1 C2 C5 59.144
C1 C2 H7 129.669 C1 C3 C4 89.455
C1 C3 H8 115.299 C1 C3 H10 112.897
C1 C5 C2 61.712 C1 C5 H12 119.508
C1 C5 H13 115.386 C2 C1 C3 90.545
C2 C1 C5 59.144 C2 C1 H6 129.669
C2 C4 C3 89.455 C2 C4 H9 115.299
C2 C4 H11 112.897 C2 C5 H12 119.508
C2 C5 H13 115.386 C3 C1 C5 108.592
C3 C1 H6 125.718 C3 C4 H9 116.462
C3 C4 H11 111.339 C4 C2 C5 108.592
C4 C2 H7 125.718 C4 C3 H8 116.462
C4 C3 H10 111.339 C5 C1 H6 122.500
C5 C2 H7 122.500 H8 C3 H10 110.096
H9 C4 H11 110.096 H12 C5 H13 115.027
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability