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

using model chemistry: HF/3-21G*

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/3-21G*
 hartrees
Energy at 0K-265.338659
Energy at 298.15K-265.345953
HF Energy-265.338659
Nuclear repulsion energy177.102477
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/3-21G*
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' 3302 2980 58.09 111.12 0.29 0.44
2 A' 3280 2961 28.19 52.73 0.72 0.84
3 A' 3251 2934 8.39 100.21 0.19 0.31
4 A' 3216 2903 14.87 94.75 0.03 0.05
5 A' 1911 1725 286.02 5.38 0.35 0.52
6 A' 1692 1528 8.69 3.81 0.70 0.82
7 A' 1672 1509 5.02 27.97 0.75 0.86
8 A' 1580 1426 9.76 3.40 0.75 0.86
9 A' 1542 1392 9.74 1.82 0.71 0.83
10 A' 1539 1389 5.61 6.68 0.60 0.75
11 A' 1315 1187 538.25 0.89 0.24 0.38
12 A' 1236 1116 10.90 6.14 0.16 0.28
13 A' 1075 971 10.08 7.56 0.74 0.85
14 A' 911 823 16.62 15.72 0.30 0.46
15 A' 846 764 6.60 4.68 0.41 0.58
16 A' 391 353 9.52 1.77 0.41 0.58
17 A' 226 204 10.18 0.51 0.44 0.61
18 A" 3307 2985 43.98 1.65 0.75 0.86
19 A" 3280 2960 0.06 106.64 0.75 0.86
20 A" 1658 1496 5.77 24.19 0.75 0.86
21 A" 1427 1288 0.14 13.16 0.75 0.86
22 A" 1294 1168 8.76 2.21 0.75 0.86
23 A" 1181 1066 2.97 4.43 0.75 0.86
24 A" 905 817 0.65 0.06 0.75 0.86
25 A" 334 301 41.06 2.17 0.75 0.86
26 A" 241 217 5.19 0.56 0.75 0.86
27 A" 58 52 0.45 0.36 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 21333.6 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 19255.8 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/3-21G*
ABC
0.60981 0.09474 0.08456

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.191 -0.269 0.000
C2 -0.710 -0.613 0.000
O3 0.000 0.666 0.000
C4 1.342 0.654 0.000
O5 2.016 -0.340 0.000
H6 -2.787 -1.174 0.000
H7 -2.435 0.314 0.878
H8 -2.435 0.314 -0.878
H9 -0.421 -1.174 -0.877
H10 -0.421 -1.174 0.877
H11 1.720 1.662 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.52082.38213.65204.20761.08351.08181.08182.17282.17284.3619
C21.52081.46282.41182.73932.15112.14622.14621.07971.07973.3288
O32.38211.46281.34252.25303.33912.61212.61212.08052.08051.9878
C43.65202.41181.34251.20064.51543.89273.89272.68632.68631.0764
O54.20762.73932.25301.20064.87434.58334.58332.72032.72032.0235
H61.08352.15113.33914.51544.87431.76321.76322.52302.52305.3248
H71.08182.14622.61213.89274.58331.76321.75683.05742.50354.4556
H81.08182.14622.61213.89274.58331.76321.75682.50353.05744.4556
H92.17281.07972.08052.68632.72032.52303.05742.50351.75323.6594
H102.17281.07972.08052.68632.72032.52302.50353.05741.75323.6594
H114.36193.32881.98781.07642.02355.32484.45564.45563.65943.6594

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 105.937 C1 C2 H9 112.225
C1 C2 H10 112.225 C2 C1 H6 110.247
C2 C1 H7 109.951 C2 C1 H8 109.951
C2 O3 C4 118.513 O3 C2 H9 108.895
O3 C2 H10 108.895 O3 C4 O5 124.636
O3 C4 H11 110.043 O5 C4 H11 125.321
H6 C1 H7 109.040 H6 C1 H8 109.040
H7 C1 H8 108.578 H9 C2 H10 108.553
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.614      
2 C -0.103      
3 O -0.692      
4 C 0.648      
5 O -0.589      
6 H 0.206      
7 H 0.226      
8 H 0.226      
9 H 0.229      
10 H 0.229      
11 H 0.233      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.916 0.545 0.000 1.992
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.626 5.905 0.000
y 5.905 -29.160 0.000
z 0.000 0.000 -29.274
Traceless
 xyz
x -4.408 5.905 0.000
y 5.905 2.290 0.000
z 0.000 0.000 2.119
Polar
3z2-r24.238
x2-y2-4.465
xy5.905
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.840 0.124 0.000
y 0.124 4.898 0.000
z 0.000 0.000 3.580


<r2> (average value of r2) Å2
<r2> 137.149
(<r2>)1/2 11.711