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

using model chemistry: QCISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2h 1Ag
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-155.657876
Energy at 298.15K-155.665566
HF Energy-155.243642
Nuclear repulsion energy114.584124
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/3-21G*
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 3102 2982 0.00      
2 A 3080 2961 0.00      
3 A 3014 2897 0.00      
4 A 1721 1654 0.00      
5 A 1572 1510 0.00      
6 A 1477 1419 0.00      
7 A 1374 1320 0.00      
8 A 1183 1137 0.00      
9 A 873 839 0.00      
10 A 504 485 0.00      
11 A 3065 2946 49.49      
12 A 1564 1503 11.61      
13 A 1119 1076 0.04      
14 A 1004 965 35.38      
15 A 242 232 3.64      
16 A 160 154 0.69      
17 A 3065 2946 0.00      
18 A 1564 1503 0.00      
19 A 1113 1070 0.00      
20 A 757 728 0.00      
21 A 203 195 0.00      
22 A 3110 2989 59.07      
23 A 3078 2959 20.63      
24 A 3014 2896 45.45      
25 A 1579 1518 12.75      
26 A 1476 1419 7.12      
27 A 1382 1329 1.67      
28 A 1059 1018 4.83      
29 A 1011 971 6.07      
30 A 289 277 0.60      

Unscaled Zero Point Vibrational Energy (zpe) 23876.7 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 22947.9 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/3-21G*
ABC
1.13396 0.12145 0.11445

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.672 0.000
C2 0.000 -0.672 0.000
C3 -1.258 1.537 0.000
C4 1.258 -1.537 0.000
H5 0.953 1.211 0.000
H6 -0.953 -1.211 0.000
H7 -2.158 0.906 0.000
H8 2.158 -0.906 0.000
H9 -1.288 2.185 0.890
H10 -1.288 2.185 -0.890
H11 1.288 -2.185 0.890
H12 1.288 -2.185 -0.890

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.34391.52672.54221.09462.10992.17092.67332.17742.17743.25803.2580
C21.34392.54221.52672.10991.09462.67332.17093.25803.25802.17742.1774
C31.52672.54223.97262.23482.76471.10004.19961.10111.10114.59684.5968
C42.54221.52673.97262.76472.23484.19961.10004.59684.59681.10111.1011
H51.09462.10992.23482.76473.08133.12612.43532.60082.60083.52643.5264
H62.10991.09462.76472.23483.08132.43533.12613.52643.52642.60082.6008
H72.17092.67331.10004.19963.12612.43534.68101.78501.78504.71404.7140
H82.67332.17094.19961.10002.43533.12614.68104.71404.71401.78501.7850
H92.17743.25801.10114.59682.60083.52641.78504.71401.77955.07335.3763
H102.17743.25801.10114.59682.60083.52641.78504.71401.77955.37635.0733
H113.25802.17744.59681.10113.52642.60084.71401.78505.07335.37631.7795
H123.25802.17744.59681.10113.52642.60084.71401.78505.37635.07331.7795

picture of 2-Butene, (E)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 124.529 C1 C2 H6 119.476
C1 C3 H7 110.415 C1 C3 H9 110.871
C1 C3 H10 110.871 C2 C1 C3 124.529
C2 C1 H5 119.476 C2 C4 H8 110.415
C2 C4 H11 110.871 C2 C4 H12 110.871
C3 C1 H5 115.995 C4 C2 H6 115.995
H7 C3 H9 108.385 H7 C3 H10 108.385
H8 C4 H11 108.385 H8 C4 H12 108.385
H9 C3 H10 107.817 H11 C4 H12 107.817
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability