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=FULL/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-268.009585
Energy at 298.15K-268.016864
HF Energy-266.927339
Nuclear repulsion energy178.532720
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/6-311+G(3df,2p)
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' 3190 3007 12.34      
2 A' 3116 2937 40.13      
3 A' 3110 2932 16.11      
4 A' 3098 2920 10.91      
5 A' 1787 1685 312.47      
6 A' 1541 1453 9.92      
7 A' 1523 1436 2.64      
8 A' 1441 1358 15.23      
9 A' 1414 1333 1.73      
10 A' 1406 1326 2.03      
11 A' 1243 1172 415.17      
12 A' 1152 1086 6.41      
13 A' 1064 1003 18.19      
14 A' 877 826 10.86      
15 A' 796 751 2.79      
16 A' 387 365 5.20      
17 A' 232 219 7.12      
18 A" 3199 3016 19.45      
19 A" 3163 2982 5.06      
20 A" 1511 1424 7.10      
21 A" 1319 1244 1.56      
22 A" 1196 1128 3.66      
23 A" 1054 994 0.05      
24 A" 824 777 0.71      
25 A" 356 336 20.32      
26 A" 250 236 2.72      
27 A" 78 73 0.56      

Unscaled Zero Point Vibrational Energy (zpe) 20163.3 cm-1
Scaled (by 0.9427) Zero Point Vibrational Energy (zpe) 19008.0 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/6-311+G(3df,2p)
ABC
0.59846 0.09798 0.08691

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.164 -0.259 0.000
C2 -0.691 -0.560 0.000
O3 0.000 0.702 0.000
C4 1.331 0.617 0.000
O5 1.970 -0.402 0.000
H6 -2.728 -1.188 0.000
H7 -2.440 0.312 0.882
H8 -2.440 0.312 -0.882
H9 -0.385 -1.123 -0.880
H10 -0.385 -1.123 0.880
H11 1.759 1.623 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50362.36763.60264.13611.08711.08621.08622.16422.16424.3506
C21.50361.43862.33902.66512.13222.14422.14421.08791.08793.2809
O32.36761.43861.33352.25833.31902.62362.62362.06192.06191.9852
C43.60262.33901.33351.20294.44223.88453.88452.59672.59671.0933
O54.13612.66512.25831.20294.76334.55344.55342.61492.61492.0362
H61.08712.13223.31904.44224.76331.76361.76362.50372.50375.2947
H71.08622.14422.62363.88454.55341.76361.76413.06322.50604.4862
H81.08622.14422.62363.88454.55341.76361.76412.50603.06324.4862
H92.16421.08792.06192.59672.61492.50373.06322.50601.75903.5926
H102.16421.08792.06192.59672.61492.50372.50603.06321.75903.5926
H114.35063.28091.98521.09332.03625.29474.48624.48623.59263.5926

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 107.137 C1 C2 H9 112.261
C1 C2 H10 112.261 C2 C1 H6 109.724
C2 C1 H7 110.745 C2 C1 H8 110.745
C2 O3 C4 115.022 O3 C2 H9 108.592
O3 C2 H10 108.592 O3 C4 O5 125.756
O3 C4 H11 109.377 O5 C4 H11 124.867
H6 C1 H7 108.483 H6 C1 H8 108.483
H7 C1 H8 108.596 H9 C2 H10 107.889
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability