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

using model chemistry: MP2/6-31G*

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 MP2/6-31G*
 hartrees
Energy at 0K-267.567328
Energy at 298.15K-267.574582
HF Energy-266.825267
Nuclear repulsion energy177.222288
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 MP2/6-31G*
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' 3211 3028 14.86      
2 A' 3137 2958 52.17      
3 A' 3132 2954 19.74      
4 A' 3120 2943 10.69      
5 A' 1810 1707 244.50      
6 A' 1579 1489 6.91      
7 A' 1562 1473 2.98      
8 A' 1482 1398 18.47      
9 A' 1434 1353 1.63      
10 A' 1432 1350 5.89      
11 A' 1249 1177 404.74      
12 A' 1172 1105 8.02      
13 A' 1073 1011 15.52      
14 A' 883 833 11.61      
15 A' 796 751 3.42      
16 A' 389 367 6.22      
17 A' 235 221 7.13      
18 A" 3225 3041 22.45      
19 A" 3188 3007 10.58      
20 A" 1551 1463 6.07      
21 A" 1331 1256 0.48      
22 A" 1222 1152 5.12      
23 A" 1046 987 0.11      
24 A" 838 791 0.58      
25 A" 355 335 21.86      
26 A" 253 239 2.92      
27 A" 71 67 0.40      

Unscaled Zero Point Vibrational Energy (zpe) 20388.6 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 19226.4 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 MP2/6-31G*
ABC
0.58613 0.09686 0.08580

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.176 -0.245 0.000
C2 -0.699 -0.561 0.000
O3 0.000 0.711 0.000
C4 1.343 0.612 0.000
O5 1.981 -0.423 0.000
H6 -2.754 -1.173 0.000
H7 -2.445 0.333 0.887
H8 -2.445 0.333 -0.887
H9 -0.395 -1.128 -0.884
H10 -0.395 -1.128 0.884
H11 1.779 1.620 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51112.37713.62214.16121.09361.09191.09192.17612.17614.3727
C21.51111.45162.35462.68332.14492.15302.15301.09331.09333.3008
O32.37711.45161.34662.28283.33742.62862.62862.07872.07871.9974
C43.62212.35461.34661.21594.46933.90073.90072.61322.61321.0983
O54.16122.68332.28281.21594.79444.57714.57712.63112.63112.0531
H61.09362.14493.33744.46934.79441.77451.77452.52012.52015.3246
H71.09192.15302.62863.90074.57711.77451.77383.07802.51764.5041
H81.09192.15302.62863.90074.57711.77451.77382.51763.07804.5041
H92.17611.09332.07872.61322.63112.52013.07802.51761.76763.6136
H102.17611.09332.07872.61322.63112.52012.51763.07801.76763.6136
H114.37273.30081.99741.09832.05315.32464.50414.50413.61363.6136

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 106.694 C1 C2 H9 112.361
C1 C2 H10 112.361 C2 C1 H6 109.833
C2 C1 H7 110.580 C2 C1 H8 110.580
C2 O3 C4 114.538 O3 C2 H9 108.720
O3 C2 H10 108.720 O3 C4 O5 125.887
O3 C4 H11 109.146 O5 C4 H11 124.967
H6 C1 H7 108.579 H6 C1 H8 108.579
H7 C1 H8 108.634 H9 C2 H10 107.880
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability