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

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-194.635754
Energy at 298.15K-194.644243
HF Energy-193.941187
Nuclear repulsion energy167.150013
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 QCISD/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' 3167 3016 8.45      
2 A' 3151 3001 48.16      
3 A' 3123 2974 15.91      
4 A' 3095 2948 37.02      
5 A' 3074 2927 10.14      
6 A' 1785 1700 11.15      
7 A' 1556 1481 0.02      
8 A' 1527 1455 1.67      
9 A' 1476 1405 0.68      
10 A' 1300 1238 0.11      
11 A' 1248 1189 0.01      
12 A' 1120 1067 0.34      
13 A' 998 950 0.44      
14 A' 912 869 0.13      
15 A' 893 850 41.12      
16 A' 767 730 1.34      
17 A' 675 643 1.17      
18 A' 376 358 4.39      
19 A' 103 98 0.03      
20 A" 3247 3092 14.24      
21 A" 3127 2978 15.45      
22 A" 3070 2924 42.48      
23 A" 1519 1447 2.23      
24 A" 1321 1258 0.16      
25 A" 1278 1217 0.22      
26 A" 1248 1188 1.03      
27 A" 1224 1166 1.72      
28 A" 1066 1015 0.09      
29 A" 959 913 1.20      
30 A" 932 887 0.78      
31 A" 833 793 0.12      
32 A" 659 628 0.10      
33 A" 355 338 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 25591.7 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 24371.0 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 QCISD/6-31G*
ABC
0.34628 0.15295 0.11503

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.175 -0.426 1.094
C2 0.175 -0.426 -1.094
C3 0.000 0.620 0.000
C4 -0.033 -1.515 0.000
C5 -0.320 1.915 0.000
H6 -0.535 -0.404 1.929
H7 -0.535 -0.404 -1.929
H8 1.195 -0.436 1.505
H9 1.195 -0.436 -1.505
H10 -0.458 2.469 0.928
H11 -0.458 2.469 -0.928
H12 0.664 -2.360 0.000
H13 -1.058 -1.904 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C12.18731.52401.55712.63151.09693.10511.09902.79122.96833.58742.27482.2134
C22.18731.52401.55712.63153.10511.09692.79121.09903.58742.96832.27482.2134
C31.52401.52402.13551.33392.24882.24882.19272.19272.11842.11843.05372.7367
C41.55711.55712.13553.44222.28192.28192.22132.22134.11244.11241.09571.0961
C52.63152.63151.33393.44223.02453.02453.17613.17611.08911.08914.38733.8897
H61.09693.10512.24882.28193.02453.85791.78143.84503.04344.05222.99772.4985
H73.10511.09692.24882.28193.02453.85793.84501.78144.05223.04342.99772.4985
H81.09902.79122.19272.22133.17611.78143.84503.00963.39174.13382.49943.0806
H92.79121.09902.19272.22133.17613.84501.78143.00964.13383.39172.49943.0806
H102.96833.58742.11844.11241.08913.04344.05223.39174.13381.85545.04384.5099
H113.58742.96832.11844.11241.08914.05223.04344.13383.39171.85545.04384.5099
H122.27482.27483.05371.09574.38732.99772.99772.49942.49945.04385.04381.7815
H132.21342.21342.73671.09613.88972.49852.49853.08063.08064.50994.50991.7815

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 91.721 C1 C3 C5 133.979
C1 C4 C2 89.239 C1 C4 H12 117.015
C1 C4 H13 111.903 C2 C3 C5 133.979
C2 C4 H12 117.015 C2 C4 H13 111.903
C3 C1 C4 87.748 C3 C1 H6 117.257
C3 C1 H8 112.421 C3 C2 C4 87.748
C3 C2 H7 117.257 C3 C2 H9 112.421
C3 C5 H10 121.592 C3 C5 H11 121.592
C4 C1 H6 117.537 C4 C1 H8 112.363
C4 C2 H7 117.537 C4 C2 H9 112.363
H6 C1 H8 108.431 H7 C2 H9 108.431
H10 C5 H11 116.817 H12 C4 H13 108.739
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability