return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-267.629466
Energy at 298.15K-267.636716
HF Energy-266.846101
Nuclear repulsion energy177.150777
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/cc-pVDZ
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' 3200 3048 15.01      
2 A' 3106 2959 2.60      
3 A' 3104 2956 83.23      
4 A' 3097 2950 14.98      
5 A' 1812 1726 253.99      
6 A' 1520 1448 6.73      
7 A' 1499 1428 2.12      
8 A' 1432 1364 19.96      
9 A' 1405 1338 0.48      
10 A' 1387 1321 2.11      
11 A' 1231 1173 415.75      
12 A' 1146 1092 8.25      
13 A' 1066 1015 16.03      
14 A' 877 835 10.21      
15 A' 793 756 3.67      
16 A' 385 366 5.93      
17 A' 234 223 5.75      
18 A" 3207 3055 22.57      
19 A" 3165 3014 14.72      
20 A" 1484 1413 5.95      
21 A" 1303 1241 1.33      
22 A" 1187 1131 4.61      
23 A" 1047 998 0.05      
24 A" 815 776 0.49      
25 A" 353 336 18.36      
26 A" 250 238 2.43      
27 A" 73 69 0.39      

Unscaled Zero Point Vibrational Energy (zpe) 20088.0 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 19133.9 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 MP2/cc-pVDZ
ABC
0.58353 0.09704 0.08592

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.177 -0.249 0.000
C2 -0.692 -0.555 0.000
O3 0.000 0.715 0.000
C4 1.344 0.609 0.000
O5 1.975 -0.424 0.000
H6 -2.753 -1.188 0.000
H7 -2.452 0.332 0.894
H8 -2.452 0.332 -0.894
H9 -0.388 -1.131 -0.890
H10 -0.388 -1.131 0.890
H11 1.779 1.629 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51552.38063.62374.15571.10191.10111.10112.18402.18404.3791
C21.51551.44682.34582.67092.15602.16412.16411.10271.10273.2985
O32.38061.44681.34812.28053.34712.63792.63792.08602.08602.0003
C43.62372.34581.34811.21144.47433.90973.90972.61162.61161.1085
O54.15572.67092.28051.21144.79014.57984.57982.62222.62222.0625
H61.10192.15603.34714.47434.79011.78891.78892.52802.52805.3368
H71.10112.16412.63793.90974.57981.78891.78733.09582.53064.5151
H81.10112.16412.63793.90974.57981.78891.78732.53063.09584.5151
H92.18401.10272.08602.61162.62222.52803.09582.53061.77913.6204
H102.18401.10272.08602.61162.62222.52802.53063.09581.77913.6204
H114.37913.29852.00031.10852.06255.33684.51514.51513.62043.6204

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 106.932 C1 C2 H9 112.090
C1 C2 H10 112.090 C2 C1 H6 109.912
C2 C1 H7 110.596 C2 C1 H8 110.596
C2 O3 C4 114.092 O3 C2 H9 109.064
O3 C2 H10 109.064 O3 C4 O5 125.915
O3 C4 H11 108.637 O5 C4 H11 125.448
H6 C1 H7 108.587 H6 C1 H8 108.587
H7 C1 H8 108.506 H9 C2 H10 107.545
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability