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: HF/CEP-31G*

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 HF/CEP-31G*
 hartrees
Energy at 0K-51.356944
Energy at 298.15K-51.364330
HF Energy-51.356944
Nuclear repulsion energy99.901385
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 HF/CEP-31G*
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' 3317 2979 80.94 109.64 0.25 0.40
2 A' 3304 2967 83.44 52.87 0.62 0.76
3 A' 3283 2949 15.98 123.83 0.18 0.30
4 A' 3232 2903 34.74 135.27 0.02 0.04
5 A' 1976 1774 491.37 7.50 0.22 0.36
6 A' 1650 1482 6.01 2.82 0.45 0.62
7 A' 1625 1459 2.55 17.29 0.72 0.83
8 A' 1575 1415 20.69 5.19 0.44 0.61
9 A' 1523 1368 5.02 4.61 0.46 0.63
10 A' 1516 1362 3.81 0.56 0.50 0.66
11 A' 1366 1227 561.02 1.23 0.38 0.55
12 A' 1228 1103 16.98 9.15 0.27 0.42
13 A' 1113 1000 23.27 6.72 0.75 0.86
14 A' 939 843 22.68 9.90 0.30 0.46
15 A' 844 758 2.75 4.61 0.46 0.63
16 A' 402 361 7.05 1.79 0.36 0.53
17 A' 243 218 9.71 0.37 0.37 0.54
18 A" 3344 3003 87.11 14.08 0.75 0.86
19 A" 3306 2969 18.87 93.59 0.75 0.86
20 A" 1613 1448 3.79 15.32 0.75 0.86
21 A" 1415 1270 1.78 16.41 0.75 0.86
22 A" 1283 1152 6.66 0.90 0.75 0.86
23 A" 1171 1051 2.54 1.14 0.75 0.86
24 A" 863 775 0.00 0.16 0.75 0.86
25 A" 347 311 32.17 0.93 0.75 0.86
26 A" 253 227 5.27 0.53 0.75 0.86
27 A" 84 75 1.02 0.15 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 21406.7 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 19223.2 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 HF/CEP-31G*
ABC
0.61169 0.09605 0.08567

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.184 -0.289 0.000
C2 -0.686 -0.586 0.000
O3 0.000 0.680 0.000
C4 1.323 0.644 0.000
O5 1.999 -0.344 0.000
H6 -2.743 -1.227 0.000
H7 -2.463 0.282 0.886
H8 -2.463 0.282 -0.886
H9 -0.384 -1.146 -0.881
H10 -0.384 -1.146 0.881
H11 1.727 1.658 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.52782.38973.62984.18331.09161.09031.09032.18042.18044.3695
C21.52781.43932.35552.69512.15482.16752.16751.08741.08743.2948
O32.38971.43931.32392.24553.34062.64772.64772.06352.06351.9850
C43.62982.35551.32391.19684.47613.90573.90572.62592.62591.0913
O54.18332.69512.24551.19684.82284.59184.59182.66362.66362.0203
H61.09162.15483.34064.47614.82281.77241.77242.51982.51985.3202
H71.09032.16752.64773.90574.59181.77241.77113.08042.52314.4986
H81.09032.16752.64773.90574.59181.77241.77112.52313.08044.4986
H92.18041.08742.06352.62592.66362.51983.08042.52311.76303.6187
H102.18041.08742.06352.62592.66362.51982.52313.08041.76303.6187
H114.36953.29481.98501.09132.02035.32024.49864.49863.61873.6187

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 107.258 C1 C2 H9 111.874
C1 C2 H10 111.874 C2 C1 H6 109.573
C2 C1 H7 110.653 C2 C1 H8 110.653
C2 O3 C4 116.901 O3 C2 H9 108.713
O3 C2 H10 108.713 O3 C4 O5 125.892
O3 C4 H11 110.171 O5 C4 H11 123.937
H6 C1 H7 108.641 H6 C1 H8 108.641
H7 C1 H8 108.627 H9 C2 H10 108.321
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.200      
2 C -0.117      
3 O -0.242      
4 C 0.027      
5 O -0.253      
6 H 0.112      
7 H 0.112      
8 H 0.112      
9 H 0.134      
10 H 0.134      
11 H 0.180      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.204 0.733 0.000 2.323
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.042 5.686 0.000
y 5.686 -28.815 0.000
z 0.000 0.000 -28.997
Traceless
 xyz
x -5.136 5.686 0.000
y 5.686 2.704 0.000
z 0.000 0.000 2.432
Polar
3z2-r24.864
x2-y2-5.226
xy5.686
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.214 0.021 0.000
y 0.021 5.087 0.000
z 0.000 0.000 4.030


<r2> (average value of r2) Å2
<r2> 111.010
(<r2>)1/2 10.536