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

using model chemistry: HF/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 HF/6-31G**
 hartrees
Energy at 0K-193.955817
Energy at 298.15K-193.964578
Nuclear repulsion energy168.303131
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 HF/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' 3301 2980 10.85      
2 A' 3275 2956 73.61      
3 A' 3246 2930 21.52      
4 A' 3221 2907 50.99      
5 A' 3200 2889 14.04      
6 A' 1914 1727 21.02      
7 A' 1637 1477 0.21      
8 A' 1603 1447 1.39      
9 A' 1566 1414 0.83      
10 A' 1397 1261 3.13      
11 A' 1333 1203 0.17      
12 A' 1201 1084 0.21      
13 A' 1036 935 15.08      
14 A' 1032 932 32.41      
15 A' 955 862 0.34      
16 A' 801 723 0.89      
17 A' 715 646 1.81      
18 A' 417 376 5.31      
19 A' 100 90 0.02      
20 A" 3381 3051 18.35      
21 A" 3251 2934 18.87      
22 A" 3197 2886 62.45      
23 A" 1596 1441 1.47      
24 A" 1418 1280 0.29      
25 A" 1368 1235 0.07      
26 A" 1336 1206 0.67      
27 A" 1309 1181 1.56      
28 A" 1135 1025 0.06      
29 A" 998 901 1.13      
30 A" 984 888 1.36      
31 A" 880 795 0.09      
32 A" 697 629 0.11      
33 A" 382 345 0.18      

Unscaled Zero Point Vibrational Energy (zpe) 26941.8 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 24317.7 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 HF/6-31G**
ABC
0.35185 0.15499 0.11617

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.155 -0.424 1.090
C2 0.155 -0.424 -1.090
C3 0.000 0.622 0.000
C4 -0.030 -1.512 0.000
C5 -0.282 1.906 0.000
H6 -0.568 -0.402 1.898
H7 -0.568 -0.402 -1.898
H8 1.153 -0.429 1.519
H9 1.153 -0.429 -1.519
H10 -0.404 2.455 0.919
H11 -0.404 2.455 -0.919
H12 0.683 -2.327 0.000
H13 -1.032 -1.926 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C12.18001.51891.55132.60921.08443.07431.08652.79352.93743.55432.25622.2031
C22.18001.51891.55132.60923.07431.08442.79351.08653.55432.93742.25622.2031
C31.51891.51892.13481.31422.23022.23022.17802.17802.08902.08903.02802.7497
C41.55131.55132.13483.42742.26392.26392.20902.20904.08884.08881.08331.0839
C52.60922.60921.31423.42743.00153.00153.13403.13401.07681.07684.34213.9049
H61.08443.07432.23022.26393.00153.79621.76233.82613.02394.01472.97942.4785
H73.07431.08442.23022.26393.00153.79623.82611.76234.01473.02392.97942.4785
H81.08652.79352.17802.20903.13401.76233.82613.03823.33224.08462.47613.0532
H92.79351.08652.17802.20903.13403.82611.76233.03824.08463.33222.47613.0532
H102.93743.55432.08904.08881.07683.02394.01473.33224.08461.83704.98944.5200
H113.55432.93742.08904.08881.07684.01473.02394.08463.33221.83704.98944.5200
H122.25622.25623.02801.08334.34212.97942.97942.47612.47614.98944.98941.7613
H132.20312.20312.74971.08393.90492.47852.47853.05323.05324.52004.52001.7613

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 91.715 C1 C3 C5 134.009
C1 C4 C2 89.279 C1 C4 H12 116.702
C1 C4 H13 112.228 C2 C3 C5 134.009
C2 C4 H12 116.702 C2 C4 H13 112.228
C3 C1 C4 88.101 C3 C1 H6 116.908
C3 C1 H8 112.370 C3 C2 C4 88.101
C3 C2 H7 116.908 C3 C2 H9 112.370
C3 C5 H10 121.460 C3 C5 H11 121.460
C4 C1 H6 117.297 C4 C1 H8 112.557
C4 C2 H7 117.297 C4 C2 H9 112.557
H6 C1 H8 108.546 H7 C2 H9 108.546
H10 C5 H11 117.079 H12 C4 H13 108.722
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.242 -0.014    
2 C -0.242 -0.016    
3 C 0.063 0.131    
4 C -0.249 0.074    
5 C -0.342 -0.016    
6 H 0.129 -0.014    
7 H 0.129 0.131    
8 H 0.133 0.039    
9 H 0.133 0.040    
10 H 0.121 -0.169    
11 H 0.121 0.188    
12 H 0.119 0.188    
13 H 0.128 -0.562    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.074 -0.526 0.000 0.531
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.346 -0.522 0.000
y -0.522 -31.826 0.000
z 0.000 0.000 -30.722
Traceless
 xyz
x -1.072 -0.522 0.000
y -0.522 -0.292 0.000
z 0.000 0.000 1.364
Polar
3z2-r22.728
x2-y2-0.521
xy-0.522
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.639 0.000 -0.408
y 0.000 7.046 0.000
z -0.408 0.000 5.303


<r2> (average value of r2) Å2
<r2> 115.322
(<r2>)1/2 10.739