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/6-31G

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/6-31G
Rotational Constants (cm-1) from geometry optimized at CCD/6-31G
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCD/6-31G
 hartrees
Energy at 0K-234.691670
Energy at 298.15K-234.705210
Nuclear repulsion energy251.849966
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/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' 3109 2984 72.23      
2 A' 3085 2960 23.74      
3 A' 3082 2957 50.90      
4 A' 3076 2951 13.01      
5 A' 3051 2927 22.71      
6 A' 3033 2911 12.66      
7 A' 3004 2882 27.82      
8 A' 2999 2878 28.73      
9 A' 1563 1500 3.42      
10 A' 1555 1492 1.90      
11 A' 1551 1489 6.27      
12 A' 1541 1479 0.09      
13 A' 1474 1414 2.11      
14 A' 1457 1398 9.89      
15 A' 1351 1296 5.34      
16 A' 1326 1272 3.23      
17 A' 1275 1223 0.80      
18 A' 1237 1187 0.12      
19 A' 1032 990 0.77      
20 A' 1005 964 0.09      
21 A' 975 935 0.34      
22 A' 926 889 0.77      
23 A' 899 862 0.43      
24 A' 720 691 1.08      
25 A' 616 591 0.92      
26 A' 405 389 0.32      
27 A' 360 345 0.02      
28 A' 166 160 0.01      
29 A" 3087 2962 25.06      
30 A" 3078 2953 48.37      
31 A" 3071 2947 6.61      
32 A" 3029 2906 55.23      
33 A" 1557 1494 5.60      
34 A" 1542 1479 0.60      
35 A" 1536 1473 3.97      
36 A" 1314 1260 0.22      
37 A" 1294 1241 0.12      
38 A" 1262 1211 0.71      
39 A" 1213 1163 2.79      
40 A" 1112 1067 0.08      
41 A" 1020 978 0.01      
42 A" 935 898 1.95      
43 A" 880 844 0.06      
44 A" 812 779 0.04      
45 A" 393 377 0.10      
46 A" 303 290 0.01      
47 A" 261 251 0.00      
48 A" 227 218 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 36897.8 cm-1
Scaled (by 0.9595) Zero Point Vibrational Energy (zpe) 35403.5 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/6-31G
ABC
0.16185 0.10055 0.09200

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.098 0.413 0.000
C2 0.362 -1.754 0.000
C3 -0.098 -0.726 1.098
C4 -0.098 -0.726 -1.098
C5 1.232 1.202 0.000
C6 -1.307 1.366 0.000
H7 1.453 -1.903 0.000
H8 -0.124 -2.741 0.000
H9 0.557 -0.577 1.972
H10 0.557 -0.577 -1.972
H11 -1.121 -0.939 1.455
H12 -1.121 -0.939 -1.455
H13 2.099 0.519 0.000
H14 -2.252 0.794 0.000
H15 1.301 1.845 -0.895
H16 1.301 1.845 0.895
H17 -1.296 2.014 0.894
H18 -1.296 2.014 -0.894

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16 H17 H18
C12.21601.58271.58271.54641.53902.78793.15482.30172.30172.23372.23372.19992.18682.19282.19282.19022.1902
C22.21601.57341.57343.08203.53831.10151.10012.30462.30462.23122.23122.86173.65033.82623.82624.21294.2129
C31.58271.57342.19682.58722.65392.23582.29541.10173.14271.10342.75832.75432.85563.54152.93422.99733.5936
C41.58271.57342.19682.58722.65392.23582.29543.14271.10172.75831.10342.75432.85562.93423.54153.59362.9973
C51.54643.08202.58722.58722.54443.11314.17022.74032.74033.49773.49771.10363.50731.10431.10432.80192.8019
C61.53903.53832.65392.65392.54444.27834.27393.33713.33712.73142.73143.50991.10382.79882.79881.10471.1047
H72.78791.10152.23582.23583.11314.27831.78642.53942.53943.10963.10962.50734.58263.85663.85664.86844.8684
H83.15481.10012.29542.29544.17024.27391.78643.00583.00582.52142.52143.94684.12614.88554.88554.97854.9785
H92.30172.30461.10173.14272.74033.33712.53943.00583.94331.79233.83192.73293.69533.82622.75313.36274.2851
H102.30172.30463.14271.10172.74033.33712.53943.00583.94333.83191.79232.73293.69532.75313.82624.28513.3627
H112.23372.23121.10342.75833.49772.73143.10962.52141.79233.83192.90903.82222.52944.37433.73183.01053.7771
H122.23372.23122.75831.10343.49772.73143.10962.52143.83191.79232.90903.82222.52943.73184.37433.77713.0105
H132.19992.86172.75432.75431.10363.50992.50733.94682.73292.73293.82223.82224.35941.78771.78773.81593.8159
H142.18683.65032.85562.85563.50731.10384.58264.12613.69533.69532.52942.52944.35943.81123.81121.78901.7890
H152.19283.82623.54152.93421.10432.79883.85664.88553.82622.75314.37433.73181.78773.81121.79033.15842.6025
H162.19283.82622.93423.54151.10432.79883.85664.88552.75313.82623.73184.37431.78773.81121.79032.60253.1584
H172.19024.21292.99733.59362.80191.10474.86844.97853.36274.28513.01053.77713.81591.78903.15842.60251.7888
H182.19024.21293.59362.99732.80191.10474.86844.97854.28513.36273.77713.01053.81591.78902.60253.15841.7888

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 89.199 C1 C3 H9 116.926
C1 C3 H11 111.274 C1 C4 C2 89.199
C1 C4 H10 116.926 C1 C4 H12 111.274
C1 C5 H13 111.124 C1 C5 H15 110.526
C1 C5 H16 110.526 C1 C6 H14 110.597
C1 C6 H17 110.809 C1 C6 H18 110.809
C2 C3 H9 117.895 C2 C3 H11 111.723
C2 C4 H10 117.895 C2 C4 H12 111.723
C3 C1 C4 87.901 C3 C1 C5 111.545
C3 C1 C6 116.452 C3 C2 C4 88.553
C3 C2 H7 112.201 C3 C2 H8 117.207
C4 C1 C5 111.545 C4 C1 C6 116.452
C4 C2 H7 112.201 C4 C2 H8 117.207
C5 C1 C6 111.108 H7 C2 H8 108.461
H9 C3 H11 108.736 H10 C4 H12 108.736
H13 C5 H15 108.126 H13 C5 H16 108.126
H14 C6 H17 108.201 H14 C6 H18 108.201
H15 C5 H16 108.314 H17 C6 H18 108.122
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability