return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G**
 hartrees
Energy at 0K-194.672162
Energy at 298.15K-194.680739
HF Energy-193.954941
Nuclear repulsion energy168.319270
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/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' 3235 3023 4.99      
2 A' 3234 3022 38.64      
3 A' 3205 2995 13.01      
4 A' 3161 2954 36.77      
5 A' 3139 2933 9.84      
6 A' 1785 1667 8.53      
7 A' 1559 1457 0.18      
8 A' 1534 1433 2.06      
9 A' 1488 1391 0.57      
10 A' 1300 1215 0.02      
11 A' 1255 1173 0.02      
12 A' 1118 1045 0.49      
13 A' 1007 941 0.29      
14 A' 926 865 0.02      
15 A' 892 834 38.67      
16 A' 771 721 1.82      
17 A' 675 630 1.30      
18 A' 384 358 4.08      
19 A' 128 120 0.17      
20 A" 3335 3116 10.19      
21 A" 3209 2998 16.08      
22 A" 3135 2930 36.83      
23 A" 1522 1422 1.32      
24 A" 1324 1237 0.11      
25 A" 1286 1202 0.21      
26 A" 1245 1164 0.57      
27 A" 1221 1140 1.62      
28 A" 1072 1002 0.16      
29 A" 961 898 1.14      
30 A" 938 877 0.54      
31 A" 838 783 0.20      
32 A" 672 628 0.16      
33 A" 354 331 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 25953.1 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 24250.6 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 MP2=FULL/6-31G**
ABC
0.34580 0.15554 0.11787

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.231 -0.415 1.084
C2 0.231 -0.415 -1.084
C3 0.000 0.617 0.000
C4 -0.025 -1.492 0.000
C5 -0.439 1.874 0.000
H6 -0.419 -0.395 1.957
H7 -0.419 -0.395 -1.957
H8 1.270 -0.426 1.417
H9 1.270 -0.426 -1.417
H10 -0.624 2.404 0.923
H11 -0.624 2.404 -0.923
H12 0.616 -2.371 0.000
H13 -1.066 -1.809 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C12.16821.51501.54932.62051.08863.10961.09112.70862.95093.56532.26852.1907
C22.16821.51501.54932.62053.10961.08862.70861.09113.56532.95092.26852.1907
C31.51501.51502.10961.33132.24252.24252.17062.17062.10592.10593.05082.6498
C41.54931.54932.10963.39172.27772.27772.19612.19614.04884.04881.08761.0879
C52.62052.62051.33133.39172.99622.99623.19713.19711.08061.08064.37403.7360
H61.08863.10962.24252.27772.99623.91331.77373.77352.99064.02132.96722.4992
H73.10961.08862.24252.27772.99623.91333.77351.77374.02132.99062.96722.4992
H81.09112.70862.17062.19613.19711.77373.77352.83473.44134.13252.49353.0623
H92.70861.09112.17062.19613.19713.77351.77372.83474.13253.44132.49353.0623
H102.95093.56532.10594.04881.08062.99064.02133.44134.13251.84675.01894.3355
H113.56532.95092.10594.04881.08064.02132.99064.13253.44131.84675.01894.3355
H122.26852.26853.05081.08764.37402.96722.96722.49352.49355.01895.01891.7734
H132.19072.19072.64981.08793.73602.49922.49923.06233.06234.33554.33551.7734

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 91.378 C1 C3 C5 133.940
C1 C4 C2 88.812 C1 C4 H12 117.633
C1 C4 H13 111.135 C2 C3 C5 133.940
C2 C4 H12 117.633 C2 C4 H13 111.135
C3 C1 C4 87.005 C3 C1 H6 117.995
C3 C1 H8 111.758 C3 C2 C4 87.005
C3 C2 H7 117.995 C3 C2 H9 111.758
C3 C5 H10 121.299 C3 C5 H11 121.299
C4 C1 H6 118.371 C4 C1 H8 111.373
C4 C2 H7 118.371 C4 C2 H9 111.373
H6 C1 H8 108.926 H7 C2 H9 108.926
H10 C5 H11 117.403 H12 C4 H13 109.205
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability