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All results from a given calculation for HCOOC2H5 (Ethyl formate)

using model chemistry: MP2=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS trans 1A'
Energy calculated at MP2=FULL/3-21G
 hartrees
Energy at 0K-265.862920
Energy at 298.15K-265.870038
HF Energy-265.332986
Nuclear repulsion energy174.241172
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/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' 3179 3035 16.14      
2 A' 3115 2974 57.10      
3 A' 3113 2973 18.83      
4 A' 3104 2964 10.12      
5 A' 1672 1596 141.81      
6 A' 1614 1541 16.51      
7 A' 1602 1530 5.36      
8 A' 1498 1431 8.02      
9 A' 1441 1376 12.96      
10 A' 1437 1372 12.01      
11 A' 1171 1118 216.68      
12 A' 1157 1104 172.53      
13 A' 1025 978 6.36      
14 A' 838 800 8.69      
15 A' 779 744 4.01      
16 A' 368 351 7.48      
17 A' 218 208 6.53      
18 A" 3194 3050 25.17      
19 A" 3157 3015 11.69      
20 A" 1591 1520 5.35      
21 A" 1342 1282 0.01      
22 A" 1222 1167 5.67      
23 A" 1051 1004 0.09      
24 A" 862 823 1.06      
25 A" 336 320 24.61      
26 A" 242 231 3.22      
27 A" 41 39 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 20184.9 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 19272.6 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/3-21G
ABC
0.56194 0.09388 0.08296

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.209 -0.225 0.000
C2 -0.722 -0.587 0.000
O3 0.000 0.725 0.000
C4 1.380 0.620 0.000
O5 2.010 -0.445 0.000
H6 -2.819 -1.133 0.000
H7 -2.446 0.366 0.888
H8 -2.446 0.366 -0.888
H9 -0.431 -1.157 -0.887
H10 -0.431 -1.157 0.887
H11 1.805 1.626 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.53042.40453.68684.22431.09451.09251.09252.19452.19454.4204
C21.53041.49792.42382.73542.16672.16042.16041.09341.09343.3596
O32.40451.49791.38382.32543.37642.62652.62652.12472.12472.0176
C43.68682.42381.38381.23704.55003.93533.93532.68752.68751.0928
O54.22432.73542.32541.23704.87724.61464.61462.69272.69272.0813
H61.09452.16673.37644.55004.87721.78241.78242.54702.54705.3850
H71.09252.16042.62653.93534.61461.78241.77633.08652.52524.5217
H81.09252.16042.62653.93534.61461.78241.77632.52523.08654.5217
H92.19451.09342.12472.68752.69272.54703.08652.52521.77333.6789
H102.19451.09342.12472.68752.69272.54702.52523.08651.77333.6789
H114.42043.35962.01761.09282.08135.38504.52174.52173.67893.6789

picture of Ethyl formate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 105.123 C1 C2 H9 112.453
C1 C2 H10 112.453 C2 C1 H6 110.155
C2 C1 H7 109.779 C2 C1 H8 109.779
C2 O3 C4 114.456 O3 C2 H9 109.165
O3 C2 H10 109.165 O3 C4 O5 124.975
O3 C4 H11 108.537 O5 C4 H11 126.488
H6 C1 H7 109.168 H6 C1 H8 109.168
H7 C1 H8 108.766 H9 C2 H10 108.376
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability