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

using model chemistry: HF/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-266.845848
Energy at 298.15K-266.853264
HF Energy-266.845848
Nuclear repulsion energy179.148635
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/6-31+G**
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' 3275 2962 54.64 119.59 0.28 0.43
2 A' 3261 2949 47.42 56.68 0.68 0.81
3 A' 3236 2926 11.99 108.50 0.16 0.27
4 A' 3191 2885 22.88 125.59 0.01 0.02
5 A' 1977 1788 469.98 9.41 0.21 0.35
6 A' 1650 1492 6.28 3.24 0.57 0.73
7 A' 1621 1465 3.12 11.87 0.73 0.84
8 A' 1568 1418 18.10 3.63 0.54 0.70
9 A' 1535 1388 4.68 3.82 0.37 0.54
10 A' 1523 1378 0.32 0.31 0.74 0.85
11 A' 1374 1242 568.13 1.74 0.15 0.26
12 A' 1231 1113 15.90 6.26 0.17 0.29
13 A' 1111 1004 21.59 5.35 0.74 0.85
14 A' 939 849 22.10 7.90 0.27 0.43
15 A' 852 771 2.91 4.19 0.36 0.53
16 A' 409 370 6.62 1.67 0.28 0.44
17 A' 242 218 10.39 0.41 0.33 0.49
18 A" 3294 2978 52.63 8.73 0.75 0.86
19 A" 3263 2950 6.61 103.99 0.75 0.86
20 A" 1607 1453 5.65 11.28 0.75 0.86
21 A" 1415 1279 2.16 7.71 0.75 0.86
22 A" 1287 1164 5.28 0.34 0.75 0.86
23 A" 1183 1070 2.90 2.24 0.75 0.86
24 A" 874 791 0.02 0.20 0.75 0.86
25 A" 352 318 31.42 1.47 0.75 0.86
26 A" 254 230 5.04 0.57 0.75 0.86
27 A" 76 69 0.99 0.24 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 21300.4 cm-1
Scaled (by 0.9042) Zero Point Vibrational Energy (zpe) 19259.8 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/6-31+G**
ABC
0.62533 0.09686 0.08654

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.170 -0.296 0.000
C2 -0.686 -0.588 0.000
O3 0.000 0.667 0.000
C4 1.314 0.648 0.000
O5 1.993 -0.325 0.000
H6 -2.726 -1.228 0.000
H7 -2.452 0.272 0.880
H8 -2.452 0.272 -0.880
H9 -0.386 -1.147 -0.877
H10 -0.386 -1.147 0.877
H11 1.706 1.660 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51242.37393.60984.16351.08561.08421.08422.16242.16244.3413
C21.51241.42972.35102.69232.13802.15202.15201.08211.08213.2823
O32.37391.42971.31452.22643.31982.63492.63492.05062.05061.9739
C43.60982.35101.31451.18624.45443.88603.88602.62252.62251.0856
O54.16352.69232.22641.18624.80484.57084.57082.66522.66522.0060
H61.08562.13803.31984.45444.80481.76041.76042.50012.50015.2897
H71.08422.15202.63493.88604.57081.76041.75983.06042.50614.4709
H81.08422.15202.63493.88604.57081.76041.75982.50613.06044.4709
H92.16241.08212.05062.62252.66522.50013.06042.50611.75323.6084
H102.16241.08212.05062.62252.66522.50012.50613.06041.75323.6084
H114.34133.28231.97391.08562.00605.28974.47094.47093.60843.6084

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 107.551 C1 C2 H9 111.839
C1 C2 H10 111.839 C2 C1 H6 109.661
C2 C1 H7 110.865 C2 C1 H8 110.865
C2 O3 C4 117.845 O3 C2 H9 108.659
O3 C2 H10 108.659 O3 C4 O5 125.753
O3 C4 H11 110.295 O5 C4 H11 123.952
H6 C1 H7 108.445 H6 C1 H8 108.445
H7 C1 H8 108.488 H9 C2 H10 108.206
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.473      
2 C 0.083      
3 O -0.439      
4 C 0.530      
5 O -0.544      
6 H 0.140      
7 H 0.145      
8 H 0.145      
9 H 0.143      
10 H 0.143      
11 H 0.126      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.220 0.728 0.000 2.337
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.401 5.654 0.000
y 5.654 -29.239 0.000
z 0.000 0.000 -29.476
Traceless
 xyz
x -5.044 5.654 0.000
y 5.654 2.699 0.000
z 0.000 0.000 2.345
Polar
3z2-r24.689
x2-y2-5.162
xy5.654
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.773 -0.009 0.000
y -0.009 5.759 0.000
z 0.000 0.000 4.581


<r2> (average value of r2) Å2
<r2> 134.921
(<r2>)1/2 11.616