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All results from a given calculation for C5H8 (Cyclobutane, methylene-)

using model chemistry: CISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CISD/6-31G*
 hartrees
Energy at 0K-194.521670
Energy at 298.15K-194.530318
HF Energy-193.942436
Nuclear repulsion energy168.198382
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 CISD/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 A' 3263 3021 7.33      
2 A' 3246 3005 49.60      
3 A' 3218 2979 15.51      
4 A' 3189 2952 38.77      
5 A' 3167 2932 10.61      
6 A' 1864 1726 15.32      
7 A' 1601 1482 0.02      
8 A' 1570 1454 1.86      
9 A' 1523 1410 0.85      
10 A' 1348 1248 0.35      
11 A' 1291 1195 0.04      
12 A' 1161 1075 0.22      
13 A' 1028 952 0.40      
14 A' 962 891 45.13      
15 A' 940 871 0.72      
16 A' 789 731 1.41      
17 A' 696 644 1.53      
18 A' 398 369 4.99      
19 A' 109 101 0.03      
20 A" 3343 3095 13.53      
21 A" 3221 2982 16.12      
22 A" 3163 2929 42.91      
23 A" 1562 1446 2.38      
24 A" 1370 1269 0.13      
25 A" 1323 1225 0.21      
26 A" 1291 1195 1.10      
27 A" 1266 1172 1.81      
28 A" 1101 1019 0.10      
29 A" 988 915 1.34      
30 A" 962 891 0.77      
31 A" 859 795 0.14      
32 A" 682 632 0.13      
33 A" 368 340 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 26430.7 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 24469.6 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 CISD/6-31G*
ABC
0.34999 0.15497 0.11656

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.179 -0.423 1.088
C2 0.179 -0.423 -1.088
C3 0.000 0.619 0.000
C4 -0.031 -1.506 0.000
C5 -0.329 1.899 0.000
H6 -0.523 -0.400 1.920
H7 -0.523 -0.400 -1.920
H8 1.193 -0.431 1.489
H9 1.193 -0.431 -1.489
H10 -0.471 2.447 0.921
H11 -0.471 2.447 -0.921
H12 0.659 -2.347 0.000
H13 -1.050 -1.889 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C12.17521.51681.54942.61361.08913.08871.09112.76932.94723.56292.26192.2008
C22.17521.51681.54942.61363.08871.08912.76931.09113.56292.94722.26192.2008
C31.51681.51682.12571.32122.23612.23612.17852.17852.10042.10043.03862.7195
C41.54941.54942.12573.41812.26992.26992.20732.20734.08314.08311.08791.0883
C52.61362.61361.32123.41813.00193.00193.15663.15661.08151.08154.35933.8564
H61.08913.08872.23612.26993.00193.84061.76973.81713.01804.02312.97902.4866
H73.08871.08912.23612.26993.00193.84063.81711.76974.02313.01802.97902.4866
H81.09112.76932.17852.20733.15661.76973.81712.97833.37304.10682.48443.0619
H92.76931.09112.17852.20733.15663.81711.76972.97834.10683.37302.48443.0619
H102.94723.56292.10044.08311.08153.01804.02313.37304.10681.84275.01094.4711
H113.56292.94722.10044.08311.08154.02313.01804.10683.37301.84275.01094.4711
H122.26192.26193.03861.08794.35932.97902.97902.48442.48445.01095.01091.7693
H132.20082.20082.71951.08833.85642.48662.48663.06193.06194.47114.47111.7693

picture of Cyclobutane, methylene- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 91.619 C1 C3 C5 134.007
C1 C4 C2 89.162 C1 C4 H12 117.021
C1 C4 H13 111.907 C2 C3 C5 134.007
C2 C4 H12 117.021 C2 C4 H13 111.907
C3 C1 C4 87.770 C3 C1 H6 117.260
C3 C1 H8 112.271 C3 C2 C4 87.770
C3 C2 H7 117.260 C3 C2 H9 112.271
C3 C5 H10 121.580 C3 C5 H11 121.580
C4 C1 H6 117.635 C4 C1 H8 112.262
C4 C2 H7 117.635 C4 C2 H9 112.262
H6 C1 H8 108.525 H7 C2 H9 108.525
H10 C5 H11 116.840 H12 C4 H13 108.780
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability