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

using model chemistry: MP2/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-51.742537
Energy at 298.15K-51.749568
HF Energy-51.223270
Nuclear repulsion energy96.556238
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/CEP-121G
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' 3101 3026 43.35      
2 A' 3089 3015 33.75      
3 A' 3018 2946 18.04      
4 A' 2984 2913 23.57      
5 A' 1577 1539 227.44      
6 A' 1535 1498 21.17      
7 A' 1521 1484 3.80      
8 A' 1459 1424 16.13      
9 A' 1411 1377 27.45      
10 A' 1373 1340 7.97      
11 A' 1135 1108 7.17      
12 A' 1118 1091 431.69      
13 A' 1020 995 8.01      
14 A' 795 776 17.74      
15 A' 730 713 2.40      
16 A' 358 350 5.14      
17 A' 210 205 7.34      
18 A" 3114 3039 56.53      
19 A" 3088 3014 2.71      
20 A" 1513 1476 6.60      
21 A" 1281 1250 0.14      
22 A" 1181 1153 6.71      
23 A" 972 949 1.18      
24 A" 818 798 0.25      
25 A" 323 315 32.75      
26 A" 228 222 3.24      
27 A" 57 56 0.45      

Unscaled Zero Point Vibrational Energy (zpe) 19503.2 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 19035.1 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/CEP-121G
ABC
0.55695 0.09026 0.08006

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.246 -0.236 0.000
C2 -0.746 -0.599 0.000
O3 0.000 0.720 0.000
C4 1.397 0.640 0.000
O5 2.060 -0.433 0.000
H6 -2.846 -1.162 0.000
H7 -2.499 0.351 0.895
H8 -2.499 0.351 -0.895
H9 -0.440 -1.158 -0.897
H10 -0.440 -1.158 0.897
H11 1.819 1.653 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.54232.44103.74634.30991.10331.10041.10042.21702.21704.4829
C21.54231.51552.47512.81102.17382.18532.18531.10111.10113.4138
O32.44101.51551.39912.36093.41232.68052.68052.12812.12812.0446
C43.74632.47511.39911.26144.60944.00804.00802.72252.72251.0981
O54.30992.81102.36091.26144.95954.71184.71182.75322.75322.1003
H61.10332.17383.41234.60944.95951.79191.79192.56762.56765.4491
H71.10042.18532.68054.00804.71181.79191.79083.11952.55304.5990
H81.10042.18532.68054.00804.71181.79191.79082.55303.11954.5990
H92.21701.10112.12812.72252.75322.56763.11952.55301.79443.7170
H102.21701.10112.12812.72252.75322.56762.55303.11951.79443.7170
H114.48293.41382.04461.09812.10035.44914.59904.59903.71703.7170

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 105.930 C1 C2 H9 112.943
C1 C2 H10 112.943 C2 C1 H6 109.380
C2 C1 H7 110.446 C2 C1 H8 110.446
C2 O3 C4 116.198 O3 C2 H9 107.792
O3 C2 H10 107.792 O3 C4 O5 125.020
O3 C4 H11 109.334 O5 C4 H11 125.646
H6 C1 H7 108.802 H6 C1 H8 108.802
H7 C1 H8 108.925 H9 C2 H10 109.146
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability