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All results from a given calculation for CH3CHCHCH3 (2-Butene, (Z)-)

using model chemistry: MP2/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/cc-pVTZ
 hartrees
Energy at 0K-156.850088
Energy at 298.15K-156.857783
HF Energy-156.165070
Nuclear repulsion energy117.856119
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/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 A1 3202 3040 44.08      
2 A1 3184 3023 2.18      
3 A1 3073 2918 12.02      
4 A1 1728 1641 4.29      
5 A1 1512 1435 5.04      
6 A1 1422 1351 4.74      
7 A1 1292 1227 0.00      
8 A1 1030 978 0.69      
9 A1 884 840 0.51      
10 A1 297 282 0.00      
11 A2 3137 2979 0.00      
12 A2 1496 1420 0.00      
13 A2 1061 1007 0.00      
14 A2 1006 955 0.00      
15 A2 391 372 0.00      
16 A2 121 115 0.00      
17 B1 3137 2979 28.56      
18 B1 1502 1426 11.24      
19 B1 1071 1017 3.96      
20 B1 701 665 37.33      
21 B1 122 115 0.74      
22 B2 3182 3021 14.91      
23 B2 3167 3007 0.56      
24 B2 3070 2915 29.82      
25 B2 1504 1428 4.70      
26 B2 1445 1372 7.97      
27 B2 1389 1318 1.29      
28 B2 1164 1105 0.34      
29 B2 997 947 12.89      
30 B2 563 534 5.58      

Unscaled Zero Point Vibrational Energy (zpe) 23924.3 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 22716.1 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/cc-pVTZ
ABC
0.54265 0.17170 0.13698

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.672 0.649
C2 0.000 -0.672 0.649
C3 0.000 1.622 -0.513
C4 0.000 -1.622 -0.513
H5 0.000 1.155 1.619
H6 0.000 -1.155 1.619
H7 0.000 1.131 -1.478
H8 0.000 -1.131 -1.478
H9 -0.874 2.273 -0.479
H10 0.874 2.273 -0.479
H11 0.874 -2.273 -0.479
H12 -0.874 -2.273 -0.479

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.34391.50002.57071.08382.06832.17582.78812.14462.14463.27253.2725
C21.34392.57071.50002.06831.08382.78812.17583.27253.27252.14462.1446
C31.50002.57073.24302.18223.50011.08312.91681.09101.09103.99183.9918
C42.57071.50003.24303.50012.18222.91681.08313.99183.99181.09101.0910
H51.08382.06832.18223.50012.30923.09733.84922.53312.53314.11284.1128
H62.06831.08383.50012.18222.30923.84923.09734.11284.11282.53312.5331
H72.17582.78811.08312.91683.09733.84922.26161.75161.75163.65383.6538
H82.78812.17582.91681.08313.84923.09732.26163.65383.65381.75161.7516
H92.14463.27251.09103.99182.53314.11281.75163.65381.74864.87104.5463
H102.14463.27251.09103.99182.53314.11281.75163.65381.74864.54634.8710
H113.27252.14463.99181.09104.11282.53313.65381.75164.87104.54631.7486
H123.27252.14463.99181.09104.11282.53313.65381.75164.54634.87101.7486

picture of 2-Butene, (Z)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 129.274 C1 C2 H6 116.445
C1 C3 H7 113.788 C1 C3 H9 110.739
C1 C3 H10 110.739 C2 C1 C3 129.274
C2 C1 H5 116.445 C2 C4 H8 113.788
C2 C4 H11 110.739 C2 C4 H12 110.739
C3 C1 H5 114.281 C4 C2 H6 114.281
H7 C3 H9 107.352 H7 C3 H10 107.352
H8 C4 H11 107.352 H8 C4 H12 107.352
H9 C3 H10 106.529 H11 C4 H12 106.529
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability