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: B3LYP/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/cc-pVTZ
 hartrees
Energy at 0K-195.367780
Energy at 298.15K-195.376229
Nuclear repulsion energy167.699111
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 B3LYP/cc-pVTZ
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' 3126 3022 8.17      
2 A' 3114 3010 43.41      
3 A' 3079 2976 18.65      
4 A' 3063 2961 39.92      
5 A' 3036 2934 9.75      
6 A' 1743 1685 27.55      
7 A' 1501 1451 0.07      
8 A' 1475 1426 1.44      
9 A' 1443 1395 0.94      
10 A' 1260 1218 0.18      
11 A' 1223 1182 0.25      
12 A' 1096 1059 0.50      
13 A' 966 934 0.69      
14 A' 912 882 42.25      
15 A' 881 851 0.48      
16 A' 745 721 1.63      
17 A' 667 645 1.53      
18 A' 385 372 6.35      
19 A' 89 86 0.04      
20 A" 3203 3096 12.46      
21 A" 3082 2979 16.95      
22 A" 3032 2931 47.36      
23 A" 1461 1412 4.82      
24 A" 1282 1240 0.05      
25 A" 1241 1200 0.01      
26 A" 1226 1185 0.78      
27 A" 1190 1150 1.82      
28 A" 1043 1008 0.10      
29 A" 921 890 0.50      
30 A" 907 877 1.98      
31 A" 810 783 0.04      
32 A" 639 618 0.04      
33 A" 358 346 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 25099.3 cm-1
Scaled (by 0.9666) Zero Point Vibrational Energy (zpe) 24261.0 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 B3LYP/cc-pVTZ
ABC
0.34995 0.15388 0.11533

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.153 -0.423 1.093
C2 0.153 -0.423 -1.093
C3 0.000 0.622 0.000
C4 -0.019 -1.520 0.000
C5 -0.290 1.912 0.000
H6 -0.577 -0.402 1.901
H7 -0.577 -0.402 -1.901
H8 1.153 -0.425 1.533
H9 1.153 -0.425 -1.533
H10 -0.416 2.463 0.924
H11 -0.416 2.463 -0.924
H12 0.711 -2.327 0.000
H13 -1.019 -1.950 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C12.18521.51971.55752.61601.08993.08181.09232.80942.94703.56672.26472.2133
C22.18521.51971.55752.61603.08181.08992.80941.09233.56672.94702.26472.2133
C31.51971.51972.14171.32232.23512.23512.18542.18542.10162.10163.03332.7663
C41.55751.55752.14173.44232.27522.27522.21822.21824.10804.10801.08811.0886
C52.61602.61601.32233.44233.00833.00833.14583.14581.08301.08304.35553.9299
H61.08993.08182.23512.27523.00833.80271.76893.84543.03164.02682.99672.4914
H73.08181.08992.23512.27523.00833.80273.84541.76894.02683.03162.99672.4914
H81.09232.80942.18542.21823.14581.76893.84543.06583.34334.10372.48223.0644
H92.80941.09232.18542.21823.14583.84541.76893.06584.10373.34332.48223.0644
H102.94703.56672.10164.10801.08303.03164.02683.34334.10371.84715.00694.5490
H113.56672.94702.10164.10801.08304.02683.03164.10373.34331.84715.00694.5490
H122.26472.26473.03331.08814.35552.99672.99672.48222.48225.00695.00691.7702
H132.21332.21332.76631.08863.92992.49142.49143.06443.06444.54904.54901.7702

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 91.936 C1 C3 C5 133.874
C1 C4 C2 89.100 C1 C4 H12 116.627
C1 C4 H13 112.318 C2 C3 C5 133.874
C2 C4 H12 116.627 C2 C4 H13 112.318
C3 C1 C4 88.203 C3 C1 H6 116.890
C3 C1 H8 112.552 C3 C2 C4 88.203
C3 C2 H7 116.890 C3 C2 H9 112.552
C3 C5 H10 121.482 C3 C5 H11 121.482
C4 C1 H6 117.411 C4 C1 H8 112.491
C4 C2 H7 117.411 C4 C2 H9 112.491
H6 C1 H8 108.312 H7 C2 H9 108.312
H10 C5 H11 117.035 H12 C4 H13 108.831
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.188     -0.048
2 C -0.188     -0.048
3 C 0.081     0.225
4 C -0.159     -0.069
5 C -0.293     -0.685
6 H 0.089     0.031
7 H 0.089     0.031
8 H 0.092     0.032
9 H 0.092     0.032
10 H 0.103     0.220
11 H 0.103     0.220
12 H 0.089     0.025
13 H 0.090     0.034


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.087 -0.553 0.000 0.560
CHELPG        
AIM        
ESP 0.111 -0.550 0.000 0.561


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.501 -0.481 0.000
y -0.481 -32.340 0.000
z 0.000 0.000 -31.137
Traceless
 xyz
x -0.762 -0.481 0.000
y -0.481 -0.521 0.000
z 0.000 0.000 1.284
Polar
3z2-r22.567
x2-y2-0.161
xy-0.481
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.879 0.002 -0.324
y 0.002 8.317 -0.004
z -0.324 -0.004 6.469


<r2> (average value of r2) Å2
<r2> 116.244
(<r2>)1/2 10.782