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

using model chemistry: mPW1PW91/3-21G

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 mPW1PW91/3-21G
 hartrees
Energy at 0K-266.831925
Energy at 298.15K-266.839028
HF Energy-266.831925
Nuclear repulsion energy175.922239
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 mPW1PW91/3-21G
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' 3168 3025 14.73      
2 A' 3104 2963 3.96      
3 A' 3102 2961 66.22      
4 A' 3091 2951 10.20      
5 A' 1764 1683 200.63      
6 A' 1576 1505 11.93      
7 A' 1565 1494 5.23      
8 A' 1468 1401 14.82      
9 A' 1414 1350 6.34      
10 A' 1409 1345 4.03      
11 A' 1194 1140 359.57      
12 A' 1153 1101 8.33      
13 A' 1040 993 14.69      
14 A' 851 812 6.85      
15 A' 790 755 3.99      
16 A' 369 353 9.29      
17 A' 217 208 7.44      
18 A" 3181 3037 24.30      
19 A" 3146 3004 5.91      
20 A" 1554 1483 8.74      
21 A" 1321 1261 0.00      
22 A" 1195 1141 7.19      
23 A" 1057 1009 0.11      
24 A" 846 808 2.77      
25 A" 345 329 27.47      
26 A" 228 218 2.18      
27 A" 37 35 0.33      

Unscaled Zero Point Vibrational Energy (zpe) 20093.5 cm-1
Scaled (by 0.9546) Zero Point Vibrational Energy (zpe) 19181.2 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 mPW1PW91/3-21G
ABC
0.57583 0.09554 0.08455

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.189 -0.246 0.000
C2 -0.710 -0.587 0.000
O3 0.000 0.712 0.000
C4 1.360 0.628 0.000
O5 1.993 -0.415 0.000
H6 -2.787 -1.162 0.000
H7 -2.437 0.341 0.887
H8 -2.437 0.341 -0.887
H9 -0.411 -1.153 -0.886
H10 -0.411 -1.153 0.886
H11 1.772 1.640 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51732.38903.65414.18531.09391.09271.09272.18332.18334.3864
C21.51731.48052.39972.70892.15472.15222.15221.09291.09293.3345
O32.38901.48051.36222.28993.35812.62012.62012.10552.10552.0000
C43.65412.39971.36221.22004.51593.90963.90962.66302.66301.0931
O54.18532.70892.28991.22004.83804.58134.58132.66672.66672.0668
H61.09392.15473.35814.51594.83801.78001.78002.53532.53535.3506
H71.09272.15222.62013.90964.58131.78001.77463.07932.51764.4932
H81.09272.15222.62013.90964.58131.78001.77462.51763.07934.4932
H92.18331.09292.10552.66302.66672.53533.07932.51761.77153.6540
H102.18331.09292.10552.66302.66672.53532.51763.07931.77153.6540
H114.38643.33452.00001.09312.06685.35064.49324.49323.65403.6540

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 105.669 C1 C2 H9 112.517
C1 C2 H10 112.517 C2 C1 H6 110.160
C2 C1 H7 110.031 C2 C1 H8 110.031
C2 O3 C4 115.104 O3 C2 H9 108.872
O3 C2 H10 108.872 O3 C4 O5 124.852
O3 C4 H11 108.595 O5 C4 H11 126.553
H6 C1 H7 108.993 H6 C1 H8 108.993
H7 C1 H8 108.598 H9 C2 H10 108.273
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.654      
2 C -0.210      
3 O -0.507      
4 C 0.439      
5 O -0.477      
6 H 0.221      
7 H 0.237      
8 H 0.237      
9 H 0.244      
10 H 0.244      
11 H 0.227      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.826 0.381 0.000 1.865
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.181 5.086 0.000
y 5.086 -29.157 0.000
z 0.000 0.000 -29.035
Traceless
 xyz
x -3.085 5.086 0.000
y 5.086 1.451 0.000
z 0.000 0.000 1.634
Polar
3z2-r23.267
x2-y2-3.024
xy5.086
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.477 0.286 0.000
y 0.286 5.151 0.000
z 0.000 0.000 3.697


<r2> (average value of r2) Å2
<r2> 136.882
(<r2>)1/2 11.700