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All results from a given calculation for C4H8 (cyclobutane)

using model chemistry: B2PLYP=FULL/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at B2PLYP=FULL/cc-pVTZ
 hartrees
Energy at 0K-157.127106
Energy at 298.15K-157.136279
HF Energy-156.883486
Nuclear repulsion energy127.480609
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 B2PLYP=FULL/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 A1 3112 2974 0.00      
2 A1 3079 2943 0.00      
3 A1 1537 1469 0.00      
4 A1 1188 1135 0.00      
5 A1 1028 982 0.00      
6 A1 216 206 0.00      
7 A2 1270 1214 0.00      
8 A2 970 927 0.00      
9 B1 1269 1213 0.00      
10 B1 1177 1125 0.00      
11 B1 949 907 0.00      
12 B2 3140 3002 93.02      
13 B2 3075 2939 12.68      
14 B2 1507 1440 4.03      
15 B2 906 866 0.01      
16 B2 633 605 2.27      
17 E 3124 2986 24.84      
17 E 3124 2986 24.84      
18 E 3075 2939 72.49      
18 E 3075 2939 72.49      
19 E 1499 1432 0.81      
19 E 1499 1432 0.81      
20 E 1298 1241 1.57      
20 E 1298 1241 1.57      
21 E 1261 1206 0.36      
21 E 1261 1206 0.36      
22 E 923 882 2.50      
22 E 923 882 2.50      
23 E 761 728 0.25      
23 E 761 728 0.25      

Unscaled Zero Point Vibrational Energy (zpe) 24468.3 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 23386.8 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 B2PLYP=FULL/cc-pVTZ
ABC
0.35933 0.35933 0.21363

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVTZ

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.077 0.136
C2 0.000 -1.077 0.136
C3 -1.077 0.000 -0.136
C4 1.077 0.000 -0.136
H5 0.000 1.378 1.181
H6 0.000 1.969 -0.485
H7 0.000 -1.378 1.181
H8 0.000 -1.969 -0.485
H9 -1.378 0.000 -1.181
H10 -1.969 0.000 0.485
H11 1.378 0.000 -1.181
H12 1.969 0.000 0.485

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.15331.54661.54661.08801.08662.66783.10782.18912.27072.18912.2707
C22.15331.54661.54662.66783.10781.08801.08662.18912.27072.18912.2707
C31.54661.54662.15332.18912.27072.18912.27071.08801.08662.66783.1078
C41.54661.54662.15332.18912.27072.18912.27072.66783.10781.08801.0866
H51.08802.66782.18912.18911.76772.75553.73813.06242.50173.06242.5017
H61.08663.10782.27072.27071.76773.73813.93712.50172.94792.50172.9479
H72.66781.08802.18912.18912.75553.73811.76773.06242.50173.06242.5017
H83.10781.08662.27072.27073.73813.93711.76772.50172.94792.50172.9479
H92.18912.18911.08802.66783.06242.50173.06242.50171.76772.75553.7381
H102.27072.27071.08663.10782.50172.94792.50172.94791.76773.73813.9371
H112.18912.18912.66781.08803.06242.50173.06242.50172.75553.73811.7677
H122.27072.27073.10781.08662.50172.94792.50172.94793.73813.93711.7677

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.232 C1 C3 H9 111.188
C1 C3 H10 118.105 C1 C4 C2 88.232
C1 C4 H11 111.188 C1 C4 H12 118.105
C2 C3 H9 111.188 C2 C3 H10 118.105
C2 C4 H11 111.188 C2 C4 H12 118.105
C3 C1 C4 88.232 C3 C1 H5 111.188
C3 C1 H6 118.105 C3 C2 C4 88.232
C3 C2 H7 111.188 C3 C2 H8 118.105
C4 C1 H5 111.188 C4 C1 H6 118.105
C4 C2 H7 111.188 C4 C2 H8 118.105
H5 C1 H6 108.763 H7 C2 H8 108.763
H9 C3 H10 108.763 H11 C4 H12 108.763
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability