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: B3LYP/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 B3LYP/CEP-31G*
 hartrees
Energy at 0K-52.519255
Energy at 298.15K-52.526340
HF Energy-52.519255
Nuclear repulsion energy98.467825
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 B3LYP/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' 3128 3020 43.70      
2 A' 3077 2972 15.80      
3 A' 3061 2956 73.56      
4 A' 3057 2952 26.35      
5 A' 1790 1729 343.66      
6 A' 1513 1461 8.94      
7 A' 1494 1442 2.36      
8 A' 1427 1378 17.92      
9 A' 1391 1343 1.68      
10 A' 1380 1332 3.21      
11 A' 1211 1170 398.43      
12 A' 1123 1084 12.62      
13 A' 1019 984 25.01      
14 A' 846 817 13.19      
15 A' 772 746 0.90      
16 A' 369 356 6.41      
17 A' 222 214 7.74      
18 A" 3145 3037 71.98      
19 A" 3119 3012 0.73      
20 A" 1485 1434 6.57      
21 A" 1286 1242 0.49      
22 A" 1165 1125 5.57      
23 A" 1020 985 0.30      
24 A" 793 766 1.68      
25 A" 339 327 25.42      
26 A" 231 223 2.75      
27 A" 68 66 0.71      

Unscaled Zero Point Vibrational Energy (zpe) 19764.7 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 19086.8 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 B3LYP/CEP-31G*
ABC
0.58304 0.09411 0.08362

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.207 -0.274 0.000
C2 -0.702 -0.581 0.000
O3 0.000 0.708 0.000
C4 1.349 0.636 0.000
O5 2.015 -0.388 0.000
H6 -2.777 -1.220 0.000
H7 -2.488 0.305 0.896
H8 -2.488 0.305 -0.896
H9 -0.391 -1.148 -0.893
H10 -0.391 -1.148 0.893
H11 1.771 1.661 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.53512.41523.67024.22351.10441.10291.10292.20372.20374.4232
C21.53511.46782.38512.72472.17042.18532.18531.10231.10233.3384
O32.41521.46781.35102.29403.38022.67512.67512.09612.09612.0112
C43.67022.38511.35101.22134.52383.95443.95442.64682.64681.1091
O54.22352.72472.29401.22134.86384.64384.64382.67682.67682.0638
H61.10442.17043.38024.52384.86381.79161.79162.54812.54815.3834
H71.10292.18532.67513.95444.64381.79161.79143.11542.55114.5588
H81.10292.18532.67513.95444.64381.79161.79142.55113.11544.5588
H92.20371.10232.09612.64682.67682.54813.11542.55111.78513.6554
H102.20371.10232.09612.64682.67682.54812.55113.11541.78513.6554
H114.42323.33842.01121.10912.06385.38344.55884.55883.65543.6554

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 107.056 C1 C2 H9 112.311
C1 C2 H10 112.311 C2 C1 H6 109.542
C2 C1 H7 110.803 C2 C1 H8 110.803
C2 O3 C4 115.525 O3 C2 H9 108.448
O3 C2 H10 108.448 O3 C4 O5 126.132
O3 C4 H11 109.280 O5 C4 H11 124.588
H6 C1 H7 108.513 H6 C1 H8 108.513
H7 C1 H8 108.605 H9 C2 H10 108.137
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.317      
2 C -0.274      
3 O -0.094      
4 C -0.188      
5 O -0.143      
6 H 0.150      
7 H 0.153      
8 H 0.153      
9 H 0.174      
10 H 0.174      
11 H 0.211      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.190 0.522 0.000 2.251
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.030 5.208 0.000
y 5.208 -28.763 0.000
z 0.000 0.000 -28.932
Traceless
 xyz
x -4.182 5.208 0.000
y 5.208 2.218 0.000
z 0.000 0.000 1.965
Polar
3z2-r23.929
x2-y2-4.267
xy5.208
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.223 0.149 0.000
y 0.149 5.469 0.000
z 0.000 0.000 4.232


<r2> (average value of r2) Å2
<r2> 112.967
(<r2>)1/2 10.629