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

using model chemistry: CID/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 CID/3-21G
 hartrees
Energy at 0K-193.263679
Energy at 298.15K-193.273005
Nuclear repulsion energy174.454761
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 CID/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' 3321 3094 15.74      
2 A' 3296 3070 3.82      
3 A' 3221 3000 38.95      
4 A' 3212 2992 11.20      
5 A' 3161 2945 35.55      
6 A' 1607 1497 1.81      
7 A' 1580 1472 3.72      
8 A' 1405 1308 0.16      
9 A' 1302 1213 3.43      
10 A' 1259 1173 0.56      
11 A' 1164 1085 2.02      
12 A' 1079 1005 0.43      
13 A' 1011 942 7.47      
14 A' 991 923 1.84      
15 A' 910 848 1.73      
16 A' 809 754 2.00      
17 A' 786 732 8.08      
18 A' 446 415 0.85      
19 A" 3303 3077 11.55      
20 A" 3201 2982 0.02      
21 A" 3150 2935 34.65      
22 A" 1586 1477 0.69      
23 A" 1355 1262 9.36      
24 A" 1344 1252 0.77      
25 A" 1290 1202 0.30      
26 A" 1201 1119 3.25      
27 A" 1174 1094 3.11      
28 A" 1146 1067 2.01      
29 A" 1020 950 3.61      
30 A" 971 904 0.79      
31 A" 801 746 15.73      
32 A" 733 683 0.30      
33 A" 273 254 0.28      

Unscaled Zero Point Vibrational Energy (zpe) 26552.2 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 24736.0 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 CID/3-21G
ABC
0.29618 0.20138 0.15726

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.253 -0.554 0.777
C2 -0.253 -0.554 -0.777
C3 -0.253 0.999 0.796
C4 -0.253 0.999 -0.796
C5 0.965 -1.031 0.000
H6 -0.788 -1.188 1.463
H7 -0.788 -1.188 -1.463
H8 0.607 1.458 1.282
H9 0.607 1.458 -1.282
H10 -1.175 1.420 1.196
H11 -1.175 1.420 -1.196
H12 1.867 -0.431 0.000
H13 1.131 -2.100 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55331.55302.21031.52171.07642.38822.24633.00472.21822.93852.26162.2158
C21.55332.21031.55301.52172.38821.07643.00472.24632.93852.21822.26162.2158
C31.55302.21031.59252.49742.34783.18931.09002.29581.08912.23482.67863.4860
C42.21031.55301.59252.49743.18932.34782.29581.09002.23481.08912.67863.4860
C51.52171.52172.49742.49742.28892.28892.82222.82223.46613.46611.08261.0821
H61.07642.38822.34783.18932.28892.92592.99714.06002.64973.74403.12442.5797
H72.38821.07643.18932.34782.28892.92594.06002.99713.74402.64973.12442.5797
H82.24633.00471.09002.29582.82222.99714.06002.56381.78503.05242.60763.8180
H93.00472.24632.29581.09002.82224.06002.99712.56383.05241.78502.60763.8180
H102.21822.93851.08912.23483.46612.64973.74401.78503.05242.39133.75624.3743
H112.93852.21822.23481.08913.46613.74402.64973.05241.78502.39133.75624.3743
H122.26162.26162.67862.67861.08263.12443.12442.60762.60763.75623.75621.8236
H132.21582.21583.48603.48601.08212.57972.57973.81803.81804.37434.37431.8236

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 90.722 C1 C2 C5 59.310
C1 C2 H7 129.612 C1 C3 C4 89.278
C1 C3 H8 115.286 C1 C3 H10 113.016
C1 C5 C2 61.379 C1 C5 H12 119.588
C1 C5 H13 115.606 C2 C1 C3 90.722
C2 C1 C5 59.310 C2 C1 H6 129.612
C2 C4 C3 89.278 C2 C4 H9 115.286
C2 C4 H11 113.016 C2 C5 H12 119.588
C2 C5 H13 115.606 C3 C1 C5 108.630
C3 C1 H6 125.513 C3 C4 H9 116.459
C3 C4 H11 111.513 C4 C2 C5 108.630
C4 C2 H7 125.513 C4 C3 H8 116.459
C4 C3 H10 111.513 C5 C1 H6 122.600
C5 C2 H7 122.600 H8 C3 H10 110.006
H9 C4 H11 110.006 H12 C5 H13 114.789
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability