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: B3PW91/6-31G

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 B3PW91/6-31G
 hartrees
Energy at 0K-268.189122
Energy at 298.15K-268.196189
HF Energy-268.189122
Nuclear repulsion energy175.135718
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 B3PW91/6-31G
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' 3157 3023 20.43      
2 A' 3139 3007 49.77      
3 A' 3088 2958 11.16      
4 A' 3070 2940 15.31      
5 A' 1723 1650 249.84      
6 A' 1552 1487 11.80      
7 A' 1541 1476 4.58      
8 A' 1463 1401 14.33      
9 A' 1417 1357 5.47      
10 A' 1400 1341 10.36      
11 A' 1189 1139 371.11      
12 A' 1156 1107 7.89      
13 A' 1050 1006 19.47      
14 A' 829 794 11.96      
15 A' 775 742 1.83      
16 A' 373 357 7.38      
17 A' 212 203 8.05      
18 A" 3173 3038 33.66      
19 A" 3139 3007 5.61      
20 A" 1528 1463 8.98      
21 A" 1308 1253 0.16      
22 A" 1192 1142 7.70      
23 A" 1025 982 0.08      
24 A" 837 801 1.94      
25 A" 344 329 30.96      
26 A" 222 213 2.33      
27 A" 43 41 0.61      

Unscaled Zero Point Vibrational Energy (zpe) 19971.5 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 19126.7 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 B3PW91/6-31G
ABC
0.58638 0.09334 0.08304

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.203 -0.261 0.000
C2 -0.728 -0.592 0.000
O3 0.000 0.696 0.000
C4 1.360 0.642 0.000
O5 2.031 -0.388 0.000
H6 -2.792 -1.184 0.000
H7 -2.472 0.320 0.887
H8 -2.472 0.320 -0.887
H9 -0.422 -1.157 -0.886
H10 -0.422 -1.157 0.886
H11 1.763 1.657 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51202.40213.67544.23621.09541.09391.09392.18212.18214.4061
C21.51201.47962.42502.76662.14742.15912.15911.09441.09443.3567
O32.40211.47961.36072.30203.36632.65352.65352.09662.09662.0084
C43.67542.42501.36071.22884.53563.94653.94652.68192.68191.0930
O54.23622.76662.30201.22884.88854.64424.64422.71892.71892.0624
H61.09542.14743.36634.53564.88851.77551.77552.53072.53075.3692
H71.09392.15912.65353.94654.64421.77551.77393.08712.52724.5296
H81.09392.15912.65353.94654.64421.77551.77392.52723.08714.5296
H92.18211.09442.09662.68192.71892.53073.08712.52721.77193.6714
H102.18211.09442.09662.68192.71892.53072.52723.08711.77193.6714
H114.40613.35672.00841.09302.06245.36924.52964.52963.67143.6714

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 106.821 C1 C2 H9 112.717
C1 C2 H10 112.717 C2 C1 H6 109.860
C2 C1 H7 110.883 C2 C1 H8 110.883
C2 O3 C4 117.188 O3 C2 H9 108.152
O3 C2 H10 108.152 O3 C4 O5 125.407
O3 C4 H11 109.387 O5 C4 H11 125.206
H6 C1 H7 108.391 H6 C1 H8 108.391
H7 C1 H8 108.356 H9 C2 H10 108.096
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.489      
2 C -0.089      
3 O -0.482      
4 C 0.362      
5 O -0.415      
6 H 0.170      
7 H 0.185      
8 H 0.185      
9 H 0.195      
10 H 0.195      
11 H 0.183      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.183 0.381 0.000 2.216
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.930 5.540 0.000
y 5.540 -29.345 0.000
z 0.000 0.000 -29.171
Traceless
 xyz
x -3.672 5.540 0.000
y 5.540 1.706 0.000
z 0.000 0.000 1.966
Polar
3z2-r23.932
x2-y2-3.585
xy5.540
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.990 0.195 0.000
y 0.195 5.547 0.000
z 0.000 0.000 4.005


<r2> (average value of r2) Å2
<r2> 139.157
(<r2>)1/2 11.796