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 C6H12 ((1r,3r)-1,3-dimethylcyclobutane)

using model chemistry: MP2=FULL/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 (C2H)

Jump to S1C2
Vibrational Frequencies calculated at MP2=FULL/6-31G**
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/6-31G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP2=FULL/6-31G**
 hartrees
Energy at 0K-235.085075
Energy at 298.15K-235.098657
HF Energy-234.188414
Nuclear repulsion energy251.056946
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 MP2=FULL/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' 3217 3006 54.52      
2 A' 3213 3002 30.09      
3 A' 3201 2991 34.08      
4 A' 3151 2944 24.02      
5 A' 3146 2940 18.36      
6 A' 3131 2926 4.86      
7 A' 3119 2914 23.44      
8 A' 3115 2911 24.28      
9 A' 1563 1461 8.47      
10 A' 1558 1455 1.56      
11 A' 1553 1451 1.36      
12 A' 1464 1368 6.41      
13 A' 1461 1365 0.37      
14 A' 1425 1332 0.39      
15 A' 1409 1316 9.73      
16 A' 1318 1231 1.81      
17 A' 1290 1205 0.68      
18 A' 1237 1156 0.04      
19 A' 1179 1102 0.42      
20 A' 1084 1013 0.21      
21 A' 992 927 0.99      
22 A' 986 922 0.83      
23 A' 891 833 0.77      
24 A' 833 778 0.68      
25 A' 659 616 2.04      
26 A' 445 416 0.04      
27 A' 336 314 0.13      
28 A' 132 123 0.02      
29 A" 3214 3003 27.17      
30 A" 3212 3002 23.32      
31 A" 3199 2989 11.73      
32 A" 3129 2924 55.91      
33 A" 1558 1456 2.93      
34 A" 1557 1455 0.02      
35 A" 1530 1430 1.71      
36 A" 1336 1249 0.41      
37 A" 1310 1224 0.00      
38 A" 1268 1185 0.04      
39 A" 1176 1099 0.26      
40 A" 1166 1089 0.09      
41 A" 1021 954 2.48      
42 A" 940 879 0.01      
43 A" 934 873 0.04      
44 A" 834 779 0.33      
45 A" 378 353 0.00      
46 A" 265 248 0.12      
47 A" 258 241 0.00      
48 A" 243 227 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 37815.8 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 35335.1 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 MP2=FULL/6-31G**
ABC
0.25603 0.07851 0.07223

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.298 0.115 1.071
C2 0.298 0.115 -1.071
C3 -0.674 0.657 0.000
C4 0.905 -0.820 0.000
C5 -1.011 2.132 0.000
C6 0.298 -2.213 0.000
H7 1.007 0.887 1.372
H8 -0.123 -0.345 1.966
H9 1.007 0.887 -1.372
H10 -0.123 -0.345 -1.966
H11 -1.591 0.066 0.000
H12 1.993 -0.895 0.000
H13 -0.099 2.729 0.000
H14 -0.791 -2.165 0.000
H15 -1.590 2.405 -0.882
H16 -1.590 2.405 0.882
H17 0.607 -2.772 -0.882
H18 0.607 -2.772 0.882

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16 H17 H18
C12.14211.54441.54592.63272.56181.09081.09022.65853.10002.17202.24502.85272.74403.55322.97463.49922.9095
C22.14211.54441.54592.63272.56182.65853.10001.09081.09022.17202.24502.85272.74402.97463.55322.90953.4992
C31.54441.54442.16201.51353.02952.18142.27392.18142.27391.09113.08542.15012.82462.16202.16203.76533.7653
C41.54591.54592.16203.51971.51872.19292.26862.19292.26862.64871.09073.68822.16404.17224.17222.16252.1625
C52.63272.63271.51353.51974.53772.73903.28462.73903.28462.14614.26471.08984.30331.08971.08975.23935.2393
C62.56182.56183.02951.51874.53773.46322.74403.46322.74402.95992.14694.95721.08945.06635.06631.08951.0895
H71.09082.65852.18142.19292.73903.46321.77392.74383.73283.05032.45602.54843.79873.75843.04774.31663.7138
H81.09023.10002.27392.26863.28462.74401.77393.73283.93142.48772.94003.64842.76114.22173.30023.81262.7567
H92.65851.09082.18142.19292.73903.46322.74383.73281.77393.05032.45602.54843.79873.04773.75843.71384.3166
H103.10001.09022.27392.26863.28462.74403.73283.93141.77392.48772.94003.64842.76113.30024.22172.75673.8126
H112.17202.17201.09112.64872.14612.95993.05032.48773.05032.48773.71073.05232.37082.49972.49973.69693.6969
H122.24502.24503.08541.09074.26472.14692.45602.94002.45602.94003.71074.18413.05964.95064.95062.49452.4945
H132.85272.85272.15013.68821.08984.95722.54843.64842.54843.64843.05234.18414.94271.76261.76265.61575.6157
H142.74402.74402.82462.16404.30331.08943.79872.76113.79872.76112.37083.05964.94274.72304.72301.76061.7606
H153.55322.97462.16204.17221.08975.06633.75844.22173.04773.30022.49974.95061.76264.72301.76315.62455.8946
H162.97463.55322.16204.17221.08975.06633.04773.30023.75844.22172.49974.95061.76264.72301.76315.89465.6245
H173.49922.90953.76532.16255.23931.08954.31663.81263.71382.75673.69692.49455.61571.76065.62455.89461.7643
H182.90953.49923.76532.16255.23931.08953.71382.75674.31663.81263.69692.49455.61571.76065.89465.62451.7643

picture of (1r,3r)-1,3-dimethylcyclobutane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 87.817 C1 C3 C5 118.845
C1 C3 H11 109.805 C1 C4 C2 87.711
C1 C4 C6 113.424 C1 C4 H12 115.665
C2 C3 C5 118.845 C2 C3 H11 109.805
C2 C4 C6 113.424 C2 C4 H12 115.665
C3 C1 C4 88.790 C3 C1 H7 110.562
C3 C1 H8 118.313 C3 C2 C4 88.790
C3 C2 H9 110.562 C3 C2 H10 118.313
C3 C5 H13 110.306 C3 C5 H15 111.262
C3 C5 H16 111.262 C4 C1 H7 111.374
C4 C1 H8 117.726 C4 C2 H9 111.374
C4 C2 H10 117.726 C4 C6 H14 111.067
C4 C6 H17 110.945 C4 C6 H18 110.945
C5 C3 H11 109.907 C6 C4 H12 109.629
H7 C1 H8 108.841 H9 C2 H10 108.841
H13 C5 H15 107.941 H13 C5 H16 107.941
H14 C6 H17 107.807 H14 C6 H18 107.807
H15 C5 H16 107.995 H17 C6 H18 108.132
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability