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

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-193.364878
Energy at 298.15K-193.373172
HF Energy-192.860661
Nuclear repulsion energy164.610157
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/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' 3136 3040 37.91      
2 A' 3110 3015 8.12      
3 A' 3102 3006 10.51      
4 A' 3077 2983 30.16      
5 A' 3058 2964 1.70      
6 A' 1732 1679 6.26      
7 A' 1561 1513 0.08      
8 A' 1538 1491 0.53      
9 A' 1502 1456 0.49      
10 A' 1281 1241 0.25      
11 A' 1249 1210 0.01      
12 A' 1104 1070 0.00      
13 A' 928 899 41.51      
14 A' 919 891 0.57      
15 A' 840 814 0.00      
16 A' 750 727 1.90      
17 A' 667 646 0.53      
18 A' 360 349 6.74      
19 A' 26 26 0.02      
20 A" 3183 3085 12.85      
21 A" 3108 3013 0.00      
22 A" 3056 2962 39.25      
23 A" 1535 1488 3.11      
24 A" 1289 1249 0.35      
25 A" 1268 1229 0.66      
26 A" 1258 1220 0.00      
27 A" 1208 1171 4.12      
28 A" 1091 1057 0.00      
29 A" 895 867 0.00      
30 A" 874 848 1.82      
31 A" 834 808 0.00      
32 A" 648 628 0.00      
33 A" 360 349 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 25273.4 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 24495.0 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/3-21G
ABC
0.33916 0.14826 0.10972

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 -0.436 1.129
C2 0.001 -0.436 -1.129
C3 0.000 0.635 0.000
C4 -0.000 -1.565 0.000
C5 -0.001 1.970 0.000
H6 -0.897 -0.429 1.760
H7 -0.897 -0.429 -1.760
H8 0.900 -0.429 1.758
H9 0.900 -0.429 -1.758
H10 -0.002 2.545 0.927
H11 -0.002 2.545 -0.927
H12 0.897 -2.194 0.000
H13 -0.899 -2.191 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C12.25881.55621.59682.65791.09753.02611.09753.02442.98773.62172.27342.2731
C22.25881.55621.59682.65793.02611.09753.02441.09753.62172.98772.27342.2731
C31.55621.55622.19951.33532.24382.24382.24352.24352.12352.12352.96742.9658
C41.59681.59682.19953.53482.27902.27902.27872.27874.21314.21311.09561.0956
C52.65792.65791.33533.53483.10733.10733.10803.10801.09121.09124.25984.2573
H61.09753.02612.24382.27903.10733.52071.79753.95113.21524.10713.07132.4912
H73.02611.09752.24382.27903.10733.52073.95111.79754.10713.21523.07132.4912
H81.09753.02442.24352.27873.10801.79753.95113.51633.21694.10742.49133.0718
H93.02441.09752.24352.27873.10803.95111.79753.51634.10743.21692.49133.0718
H102.98773.62172.12354.21311.09123.21524.10713.21694.10741.85494.91174.9090
H113.62172.98772.12354.21311.09124.10713.21524.10743.21691.85494.91174.9090
H122.27342.27342.96741.09564.25983.07133.07132.49132.49134.91174.91171.7956
H132.27312.27312.96581.09564.25732.49122.49123.07183.07184.90904.90901.7956

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 93.056 C1 C3 C5 133.472
C1 C4 C2 90.030 C1 C4 H12 113.914
C1 C4 H13 113.890 C2 C3 C5 133.472
C2 C4 H12 113.914 C2 C4 H13 113.890
C3 C1 C4 88.457 C3 C1 H6 114.343
C3 C1 H8 114.320 C3 C2 C4 88.457
C3 C2 H7 114.343 C3 C2 H9 114.320
C3 C5 H10 121.793 C3 C5 H11 121.793
C4 C1 H6 114.249 C4 C1 H8 114.226
C4 C2 H7 114.249 C4 C2 H9 114.226
H6 C1 H8 109.949 H7 C2 H9 109.949
H10 C5 H11 116.415 H12 C4 H13 110.060
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability