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 C4H6(CH3)2 (1,1-dimethylcyclobutane)

using model chemistry: CCD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes CS 1A'

Conformer 1 (C2V)

Jump to S1C2
Vibrational Frequencies calculated at CCD/cc-pVDZ
Rotational Constants (cm-1) from geometry optimized at CCD/cc-pVDZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVDZ
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCD/cc-pVDZ
 hartrees
Energy at 0K-235.119339
Energy at 298.15K-235.132868
Nuclear repulsion energy253.632660
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 CCD/cc-pVDZ
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' 3161 3024 61.40      
2 A' 3142 3006 42.38      
3 A' 3139 3003 24.11      
4 A' 3133 2997 11.49      
5 A' 3100 2966 26.31      
6 A' 3080 2947 10.53      
7 A' 3053 2921 27.88      
8 A' 3048 2916 26.53      
9 A' 1515 1449 1.29      
10 A' 1504 1438 2.22      
11 A' 1492 1427 4.66      
12 A' 1478 1414 0.20      
13 A' 1425 1363 1.24      
14 A' 1416 1355 6.93      
15 A' 1342 1284 4.77      
16 A' 1327 1269 0.92      
17 A' 1251 1197 1.21      
18 A' 1215 1163 0.30      
19 A' 1027 983 0.36      
20 A' 1004 961 0.35      
21 A' 962 920 0.24      
22 A' 940 900 0.20      
23 A' 889 851 0.21      
24 A' 715 684 0.62      
25 A' 611 585 1.06      
26 A' 395 378 0.41      
27 A' 350 335 0.01      
28 A' 168 161 0.00      
29 A" 3138 3003 33.69      
30 A" 3136 3000 22.92      
31 A" 3130 2994 8.07      
32 A" 3076 2943 63.95      
33 A" 1507 1441 5.99      
34 A" 1484 1420 0.18      
35 A" 1475 1412 2.72      
36 A" 1293 1237 0.01      
37 A" 1267 1212 0.40      
38 A" 1232 1179 0.03      
39 A" 1200 1148 1.32      
40 A" 1089 1042 0.03      
41 A" 989 946 0.02      
42 A" 958 917 1.51      
43 A" 898 859 0.00      
44 A" 792 758 0.08      
45 A" 386 369 0.01      
46 A" 301 288 0.01      
47 A" 275 263 0.00      
48 A" 229 219 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 36868.9 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 35272.5 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 CCD/cc-pVDZ
ABC
0.16455 0.10236 0.09348

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.102 0.405 0.000
C2 0.378 -1.730 0.000
C3 -0.102 -0.723 1.085
C4 -0.102 -0.723 -1.085
C5 1.217 1.188 0.000
C6 -1.299 1.356 0.000
H7 1.475 -1.850 0.000
H8 -0.082 -2.732 0.000
H9 0.539 -0.571 1.972
H10 0.539 -0.571 -1.972
H11 -1.128 -0.953 1.423
H12 -1.128 -0.953 -1.423
H13 2.091 0.512 0.000
H14 -2.252 0.796 0.000
H15 1.288 1.834 -0.895
H16 1.288 1.834 0.895
H17 -1.286 2.007 0.894
H18 -1.286 2.007 -0.894

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16 H17 H18
C12.18851.56471.56471.53441.52862.75143.13702.29152.29152.21872.21872.19612.18512.18562.18562.18382.1838
C22.18851.55681.55683.03683.51241.10341.10272.29312.29312.21382.21382.82203.64693.78613.78614.18794.1879
C31.56471.55682.17012.56312.63232.22162.28381.10473.12711.10502.72002.74112.84693.52012.91632.98153.5737
C41.56471.55682.17012.56312.63232.22162.28383.12711.10472.72001.10502.74112.84692.91633.52013.57372.9815
C51.53443.03682.56312.56312.52163.04894.13032.72822.72823.48033.48031.10533.49111.10621.10622.78112.7811
C61.52863.51242.63232.63232.52164.23914.26503.31323.31322.71742.71743.49371.10532.77892.77891.10671.1067
H72.75141.10342.22162.22163.04894.23911.79042.52992.52993.09993.09992.44084.57063.79563.79564.82684.8268
H83.13701.10272.28382.28384.13034.26501.79042.99092.99092.50722.50723.90534.14174.85084.85084.97094.9709
H92.29152.29311.10473.12712.72823.31322.52992.99093.94381.79643.80182.73353.68033.81662.73933.33724.2652
H102.29152.29313.12711.10472.72823.31322.52992.99093.94383.80181.79642.73353.68032.73933.81664.26523.3372
H112.21872.21381.10502.72003.48032.71743.09992.50721.79643.80182.84663.81322.51914.35693.72633.01113.7628
H122.21872.21382.72001.10503.48032.71743.09992.50723.80181.79642.84663.81322.51913.72634.35693.76283.0111
H132.19612.82202.74112.74111.10533.49372.44083.90532.73352.73353.81323.81324.35261.78741.78743.80003.8000
H142.18513.64692.84692.84693.49111.10534.57064.14173.68033.68032.51912.51914.35263.79613.79611.78911.7891
H152.18563.78613.52012.91631.10622.77893.79564.85083.81662.73934.35693.72631.78743.79611.79093.13962.5795
H162.18563.78612.91633.52011.10622.77893.79564.85082.73933.81663.72634.35691.78743.79611.79092.57953.1396
H172.18384.18792.98153.57372.78111.10674.82684.97093.33724.26523.01113.76283.80001.78913.13962.57951.7889
H182.18384.18793.57372.98152.78111.10674.82684.97094.26523.33723.76283.01113.80001.78912.57953.13961.7889

picture of 1,1-dimethylcyclobutane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 89.030 C1 C3 H9 117.242
C1 C3 H11 111.250 C1 C4 C2 89.030
C1 C4 H10 117.242 C1 C4 H12 111.250
C1 C5 H13 111.574 C1 C5 H15 110.681
C1 C5 H16 110.681 C1 C6 H14 111.100
C1 C6 H17 110.910 C1 C6 H18 110.910
C2 C3 H9 117.993 C2 C3 H11 111.415
C2 C4 H10 117.993 C2 C4 H12 111.415
C3 C1 C4 87.809 C3 C1 C5 111.590
C3 C1 C6 116.629 C3 C2 C4 88.368
C3 C2 H7 112.131 C3 C2 H8 117.332
C4 C1 C5 111.590 C4 C1 C6 116.629
C4 C2 H7 112.131 C4 C2 H8 117.332
C5 C1 C6 110.821 H7 C2 H8 108.497
H9 C3 H11 108.775 H10 C4 H12 108.775
H13 C5 H15 107.843 H13 C5 H16 107.843
H14 C6 H17 107.967 H14 C6 H18 107.967
H15 C5 H16 108.081 H17 C6 H18 107.849
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability