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/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-267.910053
Energy at 298.15K-267.917267
HF Energy-266.939702
Nuclear repulsion energy178.083037
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/Def2TZVPP
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' 3183 3029 13.10      
2 A' 3110 2959 30.50      
3 A' 3108 2957 31.44      
4 A' 3092 2942 11.12      
5 A' 1779 1693 285.63      
6 A' 1533 1458 8.14      
7 A' 1514 1441 2.37      
8 A' 1435 1366 15.80      
9 A' 1410 1342 1.84      
10 A' 1400 1332 2.03      
11 A' 1227 1168 417.90      
12 A' 1145 1090 6.66      
13 A' 1056 1005 17.16      
14 A' 871 829 10.89      
15 A' 790 752 2.87      
16 A' 383 364 5.06      
17 A' 230 219 6.83      
18 A" 3192 3037 21.37      
19 A" 3160 3006 5.26      
20 A" 1502 1429 6.41      
21 A" 1312 1248 1.53      
22 A" 1191 1133 3.80      
23 A" 1049 998 0.08      
24 A" 816 776 0.58      
25 A" 350 333 19.79      
26 A" 243 231 2.24      
27 A" 68 65 0.59      

Unscaled Zero Point Vibrational Energy (zpe) 20074.7 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 19101.0 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/Def2TZVPP
ABC
0.59308 0.09762 0.08652

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.169 -0.258 0.000
C2 -0.692 -0.558 0.000
O3 0.000 0.709 0.000
C4 1.337 0.615 0.000
O5 1.971 -0.411 0.000
H6 -2.732 -1.189 0.000
H7 -2.445 0.313 0.883
H8 -2.445 0.313 -0.883
H9 -0.386 -1.121 -0.880
H10 -0.386 -1.121 0.880
H11 1.768 1.619 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50752.37493.61284.14321.08821.08721.08722.16722.16724.3619
C21.50751.44392.34312.66722.13602.14752.14751.08821.08823.2852
O32.37491.44391.34022.26743.32712.62942.62942.06722.06721.9886
C43.61282.34311.34021.20574.45103.89503.89502.59912.59911.0934
O54.14322.66722.26741.20574.76774.56144.56142.61482.61482.0401
H61.08822.13603.32714.45104.76771.76601.76602.50652.50655.3049
H71.08722.14752.62943.89504.56141.76601.76643.06622.50874.4984
H81.08722.14752.62943.89504.56141.76601.76642.50873.06624.4984
H92.16721.08822.06722.59912.61482.50653.06622.50871.75943.5951
H102.16721.08822.06722.59912.61482.50652.50873.06621.75943.5951
H114.36193.28521.98861.09342.04015.30494.49844.49843.59513.5951

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 107.140 C1 C2 H9 112.214
C1 C2 H10 112.214 C2 C1 H6 109.694
C2 C1 H7 110.678 C2 C1 H8 110.678
C2 O3 C4 114.568 O3 C2 H9 108.641
O3 C2 H10 108.641 O3 C4 O5 125.812
O3 C4 H11 109.183 O5 C4 H11 125.005
H6 C1 H7 108.544 H6 C1 H8 108.544
H7 C1 H8 108.646 H9 C2 H10 107.890
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability