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

using model chemistry: B3PW91/6-311G*

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 B3PW91/6-311G*
 hartrees
Energy at 0K-268.345169
Energy at 298.15K-268.352341
HF Energy-268.345169
Nuclear repulsion energy177.873582
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 B3PW91/6-311G*
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' 3128 3011 26.59      
2 A' 3069 2954 13.51      
3 A' 3052 2938 16.14      
4 A' 3048 2934 81.71      
5 A' 1830 1762 317.56      
6 A' 1529 1472 9.27      
7 A' 1510 1454 2.97      
8 A' 1435 1381 19.06      
9 A' 1408 1356 1.45      
10 A' 1398 1346 0.60      
11 A' 1225 1179 402.35      
12 A' 1142 1099 12.89      
13 A' 1044 1005 21.63      
14 A' 868 835 12.01      
15 A' 798 768 1.98      
16 A' 382 367 6.30      
17 A' 225 217 7.01      
18 A" 3137 3020 44.41      
19 A" 3107 2991 4.49      
20 A" 1499 1443 8.70      
21 A" 1311 1262 1.17      
22 A" 1185 1141 4.77      
23 A" 1035 996 0.08      
24 A" 812 782 0.96      
25 A" 353 340 21.70      
26 A" 236 227 2.20      
27 A" 59 57 0.64      

Unscaled Zero Point Vibrational Energy (zpe) 19911.2 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 19168.6 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 B3PW91/6-311G*
ABC
0.60239 0.09655 0.08588

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.175 -0.275 0.000
C2 -0.695 -0.569 0.000
O3 0.000 0.696 0.000
C4 1.333 0.626 0.000
O5 1.990 -0.377 0.000
H6 -2.741 -1.211 0.000
H7 -2.461 0.297 0.886
H8 -2.461 0.297 -0.886
H9 -0.386 -1.136 -0.882
H10 -0.386 -1.136 0.882
H11 1.744 1.647 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50892.38233.62254.16621.09341.09261.09262.17282.17284.3651
C21.50891.44372.35462.69182.14422.15732.15731.09321.09323.2956
O32.38231.44371.33512.26043.33922.64602.64602.06992.06991.9862
C43.62252.35461.33511.19864.46953.91043.91042.61542.61541.1004
O54.16622.69182.26041.19864.80394.58804.58802.64552.64552.0388
H61.09342.14423.33924.46954.80391.77111.77112.51612.51615.3181
H71.09262.15732.64603.91044.58801.77111.77113.08002.52244.5042
H81.09262.15732.64603.91044.58801.77111.77112.52243.08004.5042
H92.17281.09322.06992.61542.64552.51613.08002.52241.76383.6141
H102.17281.09322.06992.61542.64552.51612.52243.08001.76383.6141
H114.36513.29561.98621.10042.03885.31814.50424.50423.61413.6141

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 107.552 C1 C2 H9 112.250
C1 C2 H10 112.250 C2 C1 H6 109.938
C2 C1 H7 111.032 C2 C1 H8 111.032
C2 O3 C4 115.795 O3 C2 H9 108.565
O3 C2 H10 108.565 O3 C4 O5 126.198
O3 C4 H11 108.900 O5 C4 H11 124.901
H6 C1 H7 108.227 H6 C1 H8 108.227
H7 C1 H8 108.290 H9 C2 H10 107.552
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.670      
2 C -0.257      
3 O -0.281      
4 C 0.190      
5 O -0.336      
6 H 0.228      
7 H 0.232      
8 H 0.232      
9 H 0.233      
10 H 0.233      
11 H 0.195      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.997 0.513 0.000 2.062
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.026 4.828 0.000
y 4.828 -29.190 0.000
z 0.000 0.000 -29.163
Traceless
 xyz
x -3.850 4.828 0.000
y 4.828 1.904 0.000
z 0.000 0.000 1.945
Polar
3z2-r23.891
x2-y2-3.836
xy4.828
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.197 0.207 0.000
y 0.207 5.843 0.000
z 0.000 0.000 4.468


<r2> (average value of r2) Å2
<r2> 135.446
(<r2>)1/2 11.638