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

using model chemistry: MP2/STO-3G

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/STO-3G
 hartrees
Energy at 0K-263.650637
Energy at 298.15K-263.657480
HF Energy-263.376232
Nuclear repulsion energy173.047516
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/STO-3G
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' 3562 3106 0.99      
2 A' 3382 2949 1.09      
3 A' 3352 2923 4.36      
4 A' 3347 2918 22.08      
5 A' 1809 1577 104.80      
6 A' 1733 1511 4.59      
7 A' 1707 1489 5.96      
8 A' 1615 1408 1.20      
9 A' 1531 1335 45.43      
10 A' 1470 1282 7.78      
11 A' 1298 1131 101.88      
12 A' 1219 1063 32.80      
13 A' 1137 991 25.36      
14 A' 961 838 7.66      
15 A' 766 668 7.36      
16 A' 380 331 2.97      
17 A' 234 204 2.81      
18 A" 3566 3109 1.47      
19 A" 3458 3015 7.63      
20 A" 1718 1498 1.22      
21 A" 1405 1225 0.13      
22 A" 1265 1103 7.01      
23 A" 961 838 0.07      
24 A" 884 771 0.20      
25 A" 314 274 9.65      
26 A" 205 178 0.46      
27 A" 61 53 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 21670.3 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 18894.3 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/STO-3G
ABC
0.53271 0.09424 0.08262

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.225 -0.233 0.000
C2 -0.692 -0.516 0.000
O3 0.000 0.786 0.000
C4 1.399 0.589 0.000
O5 1.979 -0.525 0.000
H6 -2.780 -1.186 0.000
H7 -2.510 0.343 0.896
H8 -2.510 0.343 -0.896
H9 -0.406 -1.113 -0.896
H10 -0.406 -1.113 0.896
H11 1.889 1.598 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.55842.44683.71564.21331.10321.10281.10282.21042.21044.5023
C21.55841.47392.36492.67072.19322.20142.20141.11451.11453.3355
O32.44681.47391.41272.37323.40852.70182.70182.13822.13822.0558
C43.71562.36491.41271.25554.54064.01814.01812.63742.63741.1212
O54.21332.67072.37321.25554.80464.65904.65902.61422.61422.1241
H61.10322.19323.40854.54064.80461.79291.79292.53922.53925.4359
H71.10282.20142.70184.01814.65901.79291.79153.12432.55924.6612
H81.10282.20142.70184.01814.65901.79291.79152.55923.12434.6612
H92.21041.11452.13822.63742.61422.53923.12432.55921.79283.6624
H102.21041.11452.13822.63742.61422.53922.55923.12431.79283.6624
H114.50233.33552.05581.12122.12415.43594.66124.66123.66243.6624

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 107.562 C1 C2 H9 110.476
C1 C2 H10 110.476 C2 C1 H6 109.797
C2 C1 H7 110.458 C2 C1 H8 110.458
C2 O3 C4 110.003 O3 C2 H9 110.632
O3 C2 H10 110.632 O3 C4 O5 125.500
O3 C4 H11 107.901 O5 C4 H11 126.599
H6 C1 H7 108.727 H6 C1 H8 108.727
H7 C1 H8 108.629 H9 C2 H10 107.089
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability