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

using model chemistry: B3LYP/STO-3G

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/STO-3G
 hartrees
Energy at 0K-264.858813
Energy at 298.15K-264.865488
HF Energy-264.858813
Nuclear repulsion energy172.684479
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/STO-3G
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' 3486 3111 0.27      
2 A' 3319 2962 0.45      
3 A' 3283 2930 3.44      
4 A' 3230 2883 15.87      
5 A' 1848 1649 105.89      
6 A' 1683 1502 4.50      
7 A' 1650 1473 5.95      
8 A' 1567 1398 1.64      
9 A' 1465 1307 32.70      
10 A' 1429 1275 6.66      
11 A' 1237 1104 87.52      
12 A' 1174 1048 51.18      
13 A' 1095 977 12.81      
14 A' 925 826 5.05      
15 A' 747 667 5.60      
16 A' 365 326 3.14      
17 A' 221 198 3.44      
18 A" 3491 3116 0.64      
19 A" 3386 3022 4.39      
20 A" 1670 1490 3.44      
21 A" 1351 1206 0.01      
22 A" 1215 1084 6.22      
23 A" 936 835 0.27      
24 A" 858 766 1.51      
25 A" 325 290 9.96      
26 A" 193 173 0.38      
27 A" 27 24 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 21088.2 cm-1
Scaled (by 0.8924) Zero Point Vibrational Energy (zpe) 18819.1 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/STO-3G
ABC
0.53235 0.09358 0.08210

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.229 -0.235 0.000
C2 -0.703 -0.525 0.000
O3 0.000 0.787 0.000
C4 1.408 0.589 0.000
O5 1.986 -0.518 0.000
H6 -2.786 -1.185 0.000
H7 -2.511 0.341 0.894
H8 -2.511 0.341 -0.894
H9 -0.411 -1.113 -0.897
H10 -0.411 -1.113 0.897
H11 1.884 1.606 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.55332.45203.72924.22451.10091.10041.10042.20922.20924.5064
C21.55331.48862.38712.68902.18472.19492.19491.11181.11183.3522
O32.45201.48861.42202.37653.41292.70222.70222.14112.14112.0546
C43.72922.38711.42201.24894.55354.02714.02712.64812.64811.1233
O54.22452.68902.37651.24894.81824.66454.66452.62802.62802.1271
H61.10092.18473.41294.55354.81821.78971.78972.53962.53965.4404
H71.10042.19492.70224.02714.66451.78971.78893.11962.55374.6599
H81.10042.19492.70224.02714.66451.78971.78892.55373.11964.6599
H92.20921.11182.14112.64812.62802.53963.11962.55371.79483.6701
H102.20921.11182.14112.64812.62802.53962.55373.11961.79483.6701
H114.50643.35222.05461.12332.12715.44044.65994.65993.67013.6701

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 107.408 C1 C2 H9 110.894
C1 C2 H10 110.894 C2 C1 H6 109.619
C2 C1 H7 110.441 C2 C1 H8 110.441
C2 O3 C4 110.177 O3 C2 H9 110.007
O3 C2 H10 110.007 O3 C4 O5 125.568
O3 C4 H11 107.068 O5 C4 H11 127.365
H6 C1 H7 108.777 H6 C1 H8 108.777
H7 C1 H8 108.744 H9 C2 H10 107.645
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.221      
2 C -0.041      
3 O -0.168      
4 C 0.143      
5 O -0.206      
6 H 0.083      
7 H 0.084      
8 H 0.084      
9 H 0.085      
10 H 0.085      
11 H 0.074      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.283 0.163 0.000 1.293
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.104 3.355 0.000
y 3.355 -27.785 0.000
z 0.000 0.000 -26.924
Traceless
 xyz
x -1.750 3.355 0.000
y 3.355 0.229 0.000
z 0.000 0.000 1.521
Polar
3z2-r23.041
x2-y2-1.319
xy3.355
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.462 0.213 0.000
y 0.213 3.239 0.000
z 0.000 0.000 1.999


<r2> (average value of r2) Å2
<r2> 139.004
(<r2>)1/2 11.790