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

using model chemistry: PBE1PBE/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 PBE1PBE/3-21G*
 hartrees
Energy at 0K-266.598086
Energy at 298.15K-266.605176
HF Energy-266.598086
Nuclear repulsion energy175.946072
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 PBE1PBE/3-21G*
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' 3165 3038 13.77      
2 A' 3097 2972 3.89      
3 A' 3094 2970 65.48      
4 A' 3086 2962 9.71      
5 A' 1764 1694 198.94      
6 A' 1571 1508 12.01      
7 A' 1560 1497 5.26      
8 A' 1463 1404 15.54      
9 A' 1409 1352 5.85      
10 A' 1404 1348 3.61      
11 A' 1196 1148 356.49      
12 A' 1151 1105 8.10      
13 A' 1042 1001 14.52      
14 A' 852 818 6.35      
15 A' 791 759 4.20      
16 A' 370 355 9.46      
17 A' 218 209 7.37      
18 A" 3176 3049 22.46      
19 A" 3140 3013 6.58      
20 A" 1548 1486 8.89      
21 A" 1316 1263 0.00      
22 A" 1192 1144 7.24      
23 A" 1055 1013 0.12      
24 A" 843 810 2.84      
25 A" 346 333 27.12      
26 A" 228 219 2.09      
27 A" 36 35 0.32      

Unscaled Zero Point Vibrational Energy (zpe) 20057.0 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 19250.7 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 PBE1PBE/3-21G*
ABC
0.57435 0.09573 0.08467

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.187 -0.244 0.000
C2 -0.709 -0.585 0.000
O3 0.000 0.714 0.000
C4 1.360 0.626 0.000
O5 1.990 -0.419 0.000
H6 -2.787 -1.160 0.000
H7 -2.436 0.344 0.888
H8 -2.436 0.344 -0.888
H9 -0.409 -1.153 -0.887
H10 -0.409 -1.153 0.887
H11 1.775 1.639 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51702.38753.65174.18061.09511.09401.09402.18472.18474.3864
C21.51701.47972.39692.70392.15592.15272.15271.09451.09453.3338
O32.38751.47971.36232.28993.35822.61872.61872.10642.10642.0013
C43.65172.39691.36231.22064.51453.90783.90782.66042.66041.0947
O54.18062.70392.28991.22064.83374.57794.57792.66072.66072.0693
H61.09512.15593.35824.51454.83371.78211.78212.53742.53745.3517
H71.09402.15272.61873.90784.57791.78211.77663.08182.51934.4935
H81.09402.15272.61873.90784.57791.78211.77662.51933.08184.4935
H92.18471.09452.10642.66042.66072.53743.08182.51931.77313.6534
H102.18471.09452.10642.66042.66072.53742.51933.08181.77313.6534
H114.38643.33382.00131.09472.06935.35174.49354.49353.65343.6534

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 105.626 C1 C2 H9 112.550
C1 C2 H10 112.550 C2 C1 H6 110.198
C2 C1 H7 110.015 C2 C1 H8 110.015
C2 O3 C4 114.930 O3 C2 H9 108.902
O3 C2 H10 108.902 O3 C4 O5 124.792
O3 C4 H11 108.596 O5 C4 H11 126.612
H6 C1 H7 108.998 H6 C1 H8 108.998
H7 C1 H8 108.582 H9 C2 H10 108.194
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.657      
2 C -0.213      
3 O -0.504      
4 C 0.437      
5 O -0.475      
6 H 0.223      
7 H 0.238      
8 H 0.238      
9 H 0.244      
10 H 0.244      
11 H 0.226      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.806 0.385 0.000 1.847
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.210 5.061 0.000
y 5.061 -29.247 0.000
z 0.000 0.000 -29.109
Traceless
 xyz
x -3.032 5.061 0.000
y 5.061 1.413 0.000
z 0.000 0.000 1.620
Polar
3z2-r23.239
x2-y2-2.963
xy5.061
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.489 0.287 0.000
y 0.287 5.169 0.000
z 0.000 0.000 3.709


<r2> (average value of r2) Å2
<r2> 136.770
(<r2>)1/2 11.695