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 ((Z)-hex-2-ene)

using model chemistry: QCISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes C1 1A

Conformer 1 (C1)

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

Conformer 2 (C1)

Jump to S1C1
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-235.029252
Energy at 298.15K-235.041495
HF Energy-234.175316
Nuclear repulsion energy229.498097
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 QCISD/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3173 3022 63.99      
2 A 3160 3009 5.31      
3 A 3144 2994 16.50      
4 A 3135 2986 38.13      
5 A 3132 2982 54.03      
6 A 3114 2965 24.51      
7 A 3109 2961 17.51      
8 A 3088 2940 6.64      
9 A 3059 2913 21.54      
10 A 3058 2912 29.28      
11 A 3054 2908 35.64      
12 A 3041 2896 18.15      
13 A 1770 1686 0.90      
14 A 1561 1486 5.68      
15 A 1550 1476 4.05      
16 A 1549 1475 6.41      
17 A 1544 1470 0.55      
18 A 1537 1464 1.73      
19 A 1535 1462 3.46      
20 A 1483 1412 6.49      
21 A 1466 1396 3.00      
22 A 1456 1387 2.85      
23 A 1427 1359 0.46      
24 A 1358 1293 0.09      
25 A 1333 1269 2.92      
26 A 1329 1266 1.29      
27 A 1292 1230 0.11      
28 A 1201 1144 0.70      
29 A 1148 1093 0.94      
30 A 1095 1043 1.96      
31 A 1093 1041 0.17      
32 A 1091 1039 0.85      
33 A 1033 983 4.12      
34 A 998 951 0.24      
35 A 940 896 2.52      
36 A 924 880 4.58      
37 A 894 851 3.48      
38 A 761 725 1.89      
39 A 729 694 29.02      
40 A 575 548 6.26      
41 A 474 451 0.67      
42 A 372 354 0.01      
43 A 297 283 0.03      
44 A 249 237 0.00      
45 A 202 192 0.01      
46 A 110 105 0.21      
47 A 93 88 0.00      
48 A 41 39 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 36887.8 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 35128.2 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 QCISD/6-31G*
ABC
0.27995 0.04955 0.04564

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.483 0.951 -0.071
C2 1.998 -0.473 -0.144
C3 0.769 -0.939 0.132
C4 -0.444 -0.158 0.565
C5 -1.582 -0.236 -0.463
C6 -2.839 0.507 -0.007
H7 1.695 1.652 0.222
H8 3.305 1.044 0.652
H9 2.876 1.274 -1.045
H10 2.753 -1.198 -0.457
H11 0.602 -2.014 0.017
H12 -0.192 0.895 0.747
H13 -0.806 -0.558 1.526
H14 -1.228 0.178 -1.418
H15 -1.825 -1.291 -0.656
H16 -3.638 0.441 -0.757
H17 -3.224 0.088 0.932
H18 -2.627 1.571 0.164

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16 H17 H18
C11.50602.55983.19394.25295.34121.09431.09881.09872.19993.51262.79833.95584.02274.89166.18005.85855.1526
C21.50601.34292.56203.60214.93732.17672.15462.15311.09252.08562.73163.26473.52903.94285.74195.36085.0653
C32.55981.34291.50682.52573.89022.75293.26093.27492.08511.09352.16082.13802.76432.73394.70284.20014.2231
C43.19392.56201.50681.53582.55092.82243.93743.95793.51352.20001.09771.10212.15892.16403.50802.81492.8128
C54.25293.60212.52571.53581.52953.84335.17324.74284.44042.85732.16202.15901.09951.10042.18372.17862.1787
C65.34124.93733.89022.55091.52954.68236.20255.85935.86334.26592.77952.75982.16702.16431.09731.09811.0981
H71.09432.17672.75292.82243.84334.68231.77311.77303.11423.83052.10003.58303.66134.67135.55545.21024.3230
H81.09882.15463.26093.93745.17326.20251.77311.76592.56174.13043.50144.49775.05775.78597.10946.60415.9745
H91.09872.15313.27493.95794.74285.85931.77301.76592.54404.13663.57374.85044.26415.36946.57316.52135.6420
H102.19991.09252.08513.51354.44045.86333.11422.56172.54402.34873.80844.12414.32004.58276.60386.26916.0818
H113.51262.08561.09352.20002.85734.26593.83054.13044.13662.34873.10282.52603.19602.62004.95974.46004.8265
H122.79832.73162.16081.09772.16202.77952.10003.50143.57373.80843.10281.75922.50473.06823.78653.14272.5925
H133.95583.26472.13801.10212.15902.75983.58304.49774.85044.12412.52601.75923.06382.51703.77152.57173.1140
H144.02273.52902.76432.15891.09952.16703.66135.05774.26414.32003.19602.50473.06381.75992.51253.08482.5298
H154.89163.94282.73392.16401.10042.16434.67135.78595.36944.58272.62003.06822.51701.75992.50932.52613.0833
H166.18005.74194.70283.50802.18371.09735.55547.10946.57316.60384.95973.78653.77152.51252.50931.77451.7741
H175.85855.36084.20012.81492.17861.09815.21026.60416.52136.26914.46003.14272.57173.08482.52611.77451.7734
H185.15265.06534.22312.81282.17871.09814.32305.97455.64206.08184.82652.59253.11402.52983.08331.77411.7734

picture of (Z)-hex-2-ene state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 127.844 C1 C2 H10 114.753
C2 C1 H7 112.708 C2 C1 H8 110.643
C2 C1 H9 110.530 C2 C3 C4 127.970
C2 C3 H11 117.384 C3 C2 H10 117.403
C3 C4 C5 112.215 C3 C4 H12 111.154
C3 C4 H13 109.084 C4 C3 H11 114.636
C4 C5 C6 112.645 C4 C5 H14 108.880
C4 C5 H15 109.232 C5 C4 H12 109.228
C5 C4 H13 108.747 C5 C6 H16 111.405
C5 C6 H17 110.946 C5 C6 H18 110.952
C6 C5 H14 109.942 C6 C5 H15 109.681
H7 C1 H8 107.898 H7 C1 H9 107.892
H8 C1 H9 106.946 H12 C4 H13 106.208
H14 C5 H16 94.003 H16 C6 H17 107.861
H16 C6 H18 107.822 H17 C6 H18 107.695
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability