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

using model chemistry: B3PW91/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-268.384781
Energy at 298.15K-268.391941
HF Energy-268.384781
Nuclear repulsion energy177.953529
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/aug-cc-pVTZ
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' 3122 3013 17.41      
2 A' 3059 2952 11.24      
3 A' 3048 2941 13.10      
4 A' 3034 2928 58.11      
5 A' 1804 1741 340.12      
6 A' 1509 1456 8.95      
7 A' 1490 1438 2.41      
8 A' 1418 1369 12.56      
9 A' 1394 1345 1.31      
10 A' 1386 1338 1.04      
11 A' 1222 1179 397.97      
12 A' 1133 1094 8.97      
13 A' 1038 1002 23.00      
14 A' 860 830 11.02      
15 A' 791 764 1.70      
16 A' 379 366 5.42      
17 A' 223 215 7.37      
18 A" 3130 3021 28.35      
19 A" 3097 2989 4.02      
20 A" 1479 1427 6.87      
21 A" 1294 1249 1.32      
22 A" 1173 1133 3.97      
23 A" 1042 1005 0.00      
24 A" 806 778 1.07      
25 A" 349 337 20.39      
26 A" 229 221 1.96      
27 A" 58 56 0.78      

Unscaled Zero Point Vibrational Energy (zpe) 19783.2 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 19092.7 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 B3PW91/aug-cc-pVTZ
ABC
0.60338 0.09653 0.08588

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.175 -0.285 0.000
C2 -0.695 -0.569 0.000
O3 0.000 0.696 0.000
C4 1.331 0.632 0.000
O5 1.990 -0.370 0.000
H6 -2.728 -1.226 0.000
H7 -2.466 0.282 0.885
H8 -2.466 0.282 -0.885
H9 -0.385 -1.134 -0.881
H10 -0.385 -1.134 0.881
H11 1.742 1.651 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50702.38623.62424.16601.09111.09051.09052.16802.16804.3697
C21.50701.44362.35542.69242.13612.15492.15491.09131.09133.2968
O32.38621.44361.33292.25793.33692.65252.65252.06722.06721.9867
C43.62422.35541.33291.19934.46383.91473.91472.61522.61521.0989
O54.16602.69242.25791.19934.79464.58974.58972.64582.64582.0364
H61.09112.13613.33694.46384.79461.76781.76782.50432.50435.3157
H71.09052.15492.65253.91474.58971.76781.76963.07452.51694.5130
H81.09052.15492.65253.91474.58971.76781.76962.51693.07454.5130
H92.16801.09132.06722.61522.64582.50433.07452.51691.76183.6134
H102.16801.09132.06722.61522.64582.50432.51693.07451.76183.6134
H114.36973.29681.98671.09892.03645.31574.51304.51303.61343.6134

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 107.918 C1 C2 H9 112.111
C1 C2 H10 112.111 C2 C1 H6 109.563
C2 C1 H7 111.106 C2 C1 H8 111.106
C2 O3 C4 116.005 O3 C2 H9 108.474
O3 C2 H10 108.474 O3 C4 O5 126.093
O3 C4 H11 109.188 O5 C4 H11 124.719
H6 C1 H7 108.259 H6 C1 H8 108.259
H7 C1 H8 108.459 H9 C2 H10 107.643
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.695      
2 C 0.030      
3 O -0.272      
4 C -0.024      
5 O -0.567      
6 H 0.217      
7 H 0.212      
8 H 0.212      
9 H 0.220      
10 H 0.220      
11 H 0.449      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.159 0.556 0.000 2.229
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.313 4.858 0.000
y 4.858 -29.405 0.000
z 0.000 0.000 -29.338
Traceless
 xyz
x -3.941 4.858 0.000
y 4.858 1.920 0.000
z 0.000 0.000 2.021
Polar
3z2-r24.042
x2-y2-3.908
xy4.858
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.490 0.229 0.000
y 0.229 6.805 0.000
z 0.000 0.000 5.455


<r2> (average value of r2) Å2
<r2> 135.578
(<r2>)1/2 11.644