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

using model chemistry: B3LYP/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 B3LYP/3-21G
 hartrees
Energy at 0K-266.902295
Energy at 298.15K-266.909336
HF Energy-266.902295
Nuclear repulsion energy175.090623
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/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3135 3025 18.97      
2 A' 3080 2972 8.47      
3 A' 3069 2961 10.36      
4 A' 3064 2956 69.66      
5 A' 1734 1673 191.45      
6 A' 1576 1521 9.68      
7 A' 1564 1509 5.36      
8 A' 1466 1415 9.35      
9 A' 1405 1356 9.39      
10 A' 1401 1352 5.60      
11 A' 1159 1119 344.18      
12 A' 1142 1102 18.02      
13 A' 1016 980 15.10      
14 A' 830 801 8.66      
15 A' 777 750 2.61      
16 A' 365 352 8.17      
17 A' 215 207 6.94      
18 A" 3149 3039 31.30      
19 A" 3117 3007 5.71      
20 A" 1553 1499 7.08      
21 A" 1312 1266 0.00      
22 A" 1188 1146 6.21      
23 A" 1043 1006 0.06      
24 A" 843 814 1.96      
25 A" 339 327 25.10      
26 A" 225 217 1.91      
27 A" 28 27 0.34      

Unscaled Zero Point Vibrational Energy (zpe) 19897.0 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 19198.6 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/3-21G
ABC
0.57286 0.09435 0.08356

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.201 -0.247 0.000
C2 -0.717 -0.593 0.000
O3 0.000 0.714 0.000
C4 1.368 0.630 0.000
O5 2.008 -0.412 0.000
H6 -2.801 -1.163 0.000
H7 -2.449 0.340 0.888
H8 -2.449 0.340 -0.888
H9 -0.419 -1.160 -0.887
H10 -0.419 -1.160 0.887
H11 1.774 1.647 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.52392.40183.67534.21191.09481.09341.09342.18962.18964.4034
C21.52391.49072.41732.73062.16052.15882.15881.09351.09353.3502
O32.40181.49071.37052.30183.37162.63172.63172.11462.11462.0045
C43.67532.41731.37051.22294.53813.92963.92962.68012.68011.0951
O54.21192.73062.30181.22294.86684.60624.60622.68952.68952.0724
H61.09482.16053.37164.53814.86681.78141.78142.54152.54155.3691
H71.09342.15882.63173.92964.60621.78141.77593.08562.52434.5089
H81.09342.15882.63173.92964.60621.78141.77592.52433.08564.5089
H92.18961.09352.11462.68012.68952.54153.08562.52431.77303.6707
H102.18961.09352.11462.68012.68952.54152.52433.08561.77303.6707
H114.40343.35022.00451.09512.07245.36914.50894.50893.67073.6707

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 105.629 C1 C2 H9 112.517
C1 C2 H10 112.517 C2 C1 H6 110.103
C2 C1 H7 110.055 C2 C1 H8 110.055
C2 O3 C4 115.249 O3 C2 H9 108.858
O3 C2 H10 108.858 O3 C4 O5 125.038
O3 C4 H11 108.268 O5 C4 H11 126.694
H6 C1 H7 108.995 H6 C1 H8 108.995
H7 C1 H8 108.604 H9 C2 H10 108.336
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.578      
2 C -0.162      
3 O -0.489      
4 C 0.439      
5 O -0.461      
6 H 0.196      
7 H 0.211      
8 H 0.211      
9 H 0.217      
10 H 0.217      
11 H 0.199      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.817 0.333 0.000 1.847
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.286 4.902 0.000
y 4.902 -29.314 0.000
z 0.000 0.000 -29.111
Traceless
 xyz
x -3.073 4.902 0.000
y 4.902 1.384 0.000
z 0.000 0.000 1.689
Polar
3z2-r23.378
x2-y2-2.972
xy4.902
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.598 0.330 0.000
y 0.330 5.212 0.000
z 0.000 0.000 3.706


<r2> (average value of r2) Å2
<r2> 138.280
(<r2>)1/2 11.759