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 (Cyclohexane)

using model chemistry: MP2=FULL/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes twist boat 1A

Conformer 1 (Chair)

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

Conformer 2 (twist boat)

Jump to S1C1
Energy calculated at MP2=FULL/cc-pVTZ
 hartrees
Energy at 0K-235.415797
Energy at 298.15K-235.430224
Nuclear repulsion energy258.650380
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/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 3137 2978 71.05      
2 A 3129 2971 0.00      
3 A 3112 2955 13.41      
4 A 3087 2931 0.00      
5 A 3081 2925 55.77      
6 A 3075 2920 0.00      
7 A 1538 1460 0.00      
8 A 1524 1447 12.45      
9 A 1502 1426 0.00      
10 A 1390 1320 0.00      
11 A 1361 1293 0.08      
12 A 1343 1275 0.49      
13 A 1309 1242 0.00      
14 A 1285 1220 0.00      
15 A 1270 1205 0.24      
16 A 1080 1026 0.69      
17 A 1061 1007 0.00      
18 A 948 900 0.00      
19 A 908 862 0.01      
20 A 837 795 0.00      
21 A 788 748 1.65      
22 A 467 443 0.00      
23 A 427 406 0.26      
24 A 294 279 0.00      
25 A 139 132 0.05      
26 B 3133 2975 63.00      
27 B 3125 2966 50.29      
28 B 3114 2957 24.24      
29 B 3088 2932 58.65      
30 B 3076 2920 5.15      
31 B 3065 2910 18.61      
32 B 1517 1441 4.70      
33 B 1512 1435 4.60      
34 B 1503 1427 0.64      
35 B 1386 1316 0.14      
36 B 1385 1315 0.28      
37 B 1381 1311 0.11      
38 B 1326 1259 1.94      
39 B 1184 1124 1.54      
40 B 1151 1093 0.03      
41 B 1143 1085 0.05      
42 B 1119 1063 0.01      
43 B 1031 979 1.25      
44 B 903 858 2.34      
45 B 895 849 1.21      
46 B 765 726 1.59      
47 B 544 516 0.39      
48 B 250 237 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 37844.5 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 35929.6 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/cc-pVTZ
ABC
0.15008 0.14169 0.08745

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.201 -0.645 0.399
C2 0.000 1.507 -0.000
C3 1.201 -0.646 -0.399
C4 1.201 0.645 0.399
C5 -0.000 -1.507 -0.000
C6 -1.201 0.646 -0.399
H7 -1.146 -0.399 1.459
H8 -0.274 2.156 0.828
H9 2.125 -1.199 -0.258
H10 1.146 0.399 1.459
H11 0.274 -2.156 0.828
H12 -2.125 1.199 -0.258
H13 -2.125 -1.199 0.259
H14 0.274 2.156 -0.829
H15 1.146 -0.399 -1.459
H16 2.125 1.199 0.259
H17 -0.274 -2.156 -0.829
H18 -1.146 0.399 -1.459

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16 H17 H18
C12.49742.53172.72721.53141.51811.08912.98213.43542.77892.15452.16511.08603.39583.00393.80582.15602.1323
C22.49742.49741.53143.01471.53142.66001.08723.45042.16103.76592.16273.45051.08722.65992.16273.76562.1610
C32.53172.49741.51811.53142.72733.00383.39591.08602.13232.15603.80593.43542.98181.08912.16512.15442.7791
C42.72721.53141.51812.49742.53172.77892.15452.16511.08912.98213.43543.80582.15602.13231.08603.39583.0039
C51.53143.01471.53142.49742.49742.16103.76592.16272.66001.08723.45042.16273.76562.16103.45051.08722.6599
C61.51811.53142.72732.53172.49742.13232.15603.80593.00383.39591.08602.16512.15442.77913.43542.98181.0891
H71.08912.66003.00382.77892.16102.13232.77263.77982.42682.34562.54161.74323.71153.71023.83313.01313.0247
H82.98211.08723.39592.15453.76592.15602.77264.26512.34564.34702.35013.87391.74493.71142.64494.61923.0130
H93.43543.45041.08602.16512.16273.80593.77984.26512.54162.35014.87964.28123.87361.74322.45272.64513.8334
H102.77892.16102.13231.08912.66003.00382.42682.34562.54162.77263.77983.83313.01313.02471.74323.71153.7102
H112.15453.76592.15602.98211.08723.39592.34564.34702.35012.77264.26512.64494.61923.01303.87391.74493.7114
H122.16512.16273.80593.43543.45041.08602.54162.35014.87963.77984.26512.45272.64513.83344.28123.87361.7432
H131.08603.45053.43543.80582.16272.16511.74323.87394.28123.83312.64492.45274.26503.78014.87962.35012.5416
H143.39581.08722.98182.15603.76562.15443.71151.74493.87363.01314.61922.64514.26502.77212.35014.34632.3454
H153.00392.65991.08912.13232.16102.77913.71023.71141.74323.02473.01303.83343.78012.77212.54162.34542.4273
H163.80582.16272.16511.08603.45053.43543.83312.64492.45271.74323.87394.28124.87962.35012.54164.26503.7801
H172.15603.76562.15443.39581.08722.98183.01314.61922.64513.71151.74493.87362.35014.34632.34544.26502.7721
H182.13232.16102.77913.00392.65991.08913.02473.01303.83343.71023.71141.74322.54162.34542.42733.78012.7721

picture of Cyclohexane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 C2 55.752 C1 C5 H11 109.560
C1 C5 H17 109.680 C1 C6 C3 66.260
C1 C6 H12 111.406 C1 C6 H18 108.618
C2 C4 C3 109.960 C2 C4 H10 109.964
C2 C4 H16 110.280 C2 C5 H11 126.642
C2 C5 H17 126.617 C3 C4 H10 108.619
C3 C4 H16 111.406 C3 C6 H12 172.076
C3 C6 H18 81.278 C4 C2 C5 55.752
C4 C2 H8 109.560 C4 C2 H14 109.680
C4 C3 C6 66.260 C4 C3 H9 111.406
C4 C3 H15 108.618 C5 C1 C6 109.960
C5 C1 H7 109.964 C5 C1 H13 110.280
C5 C2 H8 126.642 C5 C2 H14 126.617
C6 C1 H7 108.619 C6 C1 H13 111.406
C6 C3 H9 172.076 C6 C3 H15 81.278
H7 C1 H13 106.538 H8 C2 H14 106.741
H9 C3 H15 106.538 H10 C4 H16 106.538
H11 C5 H17 106.741 H12 C6 H18 106.538
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability