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

using model chemistry: PBEPBEultrafine/6-31G(2df,p)

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 PBEPBEultrafine/6-31G(2df,p)
 hartrees
Energy at 0K-268.085051
Energy at 298.15K-268.092079
HF Energy-268.085051
Nuclear repulsion energy176.629232
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 PBEPBEultrafine/6-31G(2df,p)
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' 3073 3041 15.10      
2 A' 2989 2958 14.83      
3 A' 2985 2955 11.29      
4 A' 2942 2912 70.77      
5 A' 1768 1750 240.05      
6 A' 1465 1449 6.82      
7 A' 1445 1430 2.69      
8 A' 1367 1353 9.96      
9 A' 1352 1338 1.33      
10 A' 1335 1321 3.40      
11 A' 1165 1153 318.25      
12 A' 1098 1087 8.17      
13 A' 1011 1000 22.53      
14 A' 831 822 7.64      
15 A' 768 760 1.96      
16 A' 367 363 5.48      
17 A' 218 216 6.03      
18 A" 3076 3044 22.75      
19 A" 3028 2996 9.92      
20 A" 1436 1421 5.20      
21 A" 1245 1232 0.96      
22 A" 1138 1127 4.12      
23 A" 992 982 0.00      
24 A" 778 770 1.31      
25 A" 351 348 15.48      
26 A" 228 226 1.26      
27 A" 45 44 0.57      

Unscaled Zero Point Vibrational Energy (zpe) 19247.9 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 19049.6 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 PBEPBEultrafine/6-31G(2df,p)
ABC
0.58544 0.09587 0.08504

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.186 -0.269 0.000
C2 -0.698 -0.561 0.000
O3 0.000 0.714 0.000
C4 1.346 0.620 0.000
O5 1.992 -0.404 0.000
H6 -2.751 -1.214 0.000
H7 -2.476 0.307 0.893
H8 -2.476 0.307 -0.893
H9 -0.383 -1.135 -0.888
H10 -0.383 -1.135 0.888
H11 1.765 1.649 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51742.39743.64244.18031.10131.10101.10102.18922.18924.3928
C21.51741.45382.36022.69382.15512.17082.17081.10311.10313.3094
O32.39741.45381.34892.28413.36002.66312.66312.08662.08661.9977
C43.64242.36021.34891.21114.48903.93683.93682.61832.61831.1113
O54.18032.69382.28411.21114.81174.61094.61092.63812.63812.0658
H61.10132.15513.36004.48904.81171.78521.78522.53112.53115.3480
H71.10102.17082.66313.93684.61091.78521.78543.10342.54164.5372
H81.10102.17082.66313.93684.61091.78521.78542.54163.10344.5372
H92.18921.10312.08662.61832.63812.53113.10342.54161.77623.6267
H102.18921.10312.08662.61832.63812.53112.54163.10341.77623.6267
H114.39283.30941.99771.11132.06585.34804.53724.53723.62673.6267

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 107.567 C1 C2 H9 112.355
C1 C2 H10 112.355 C2 C1 H6 109.750
C2 C1 H7 111.012 C2 C1 H8 111.012
C2 O3 C4 114.681 O3 C2 H9 108.609
O3 C2 H10 108.609 O3 C4 O5 126.231
O3 C4 H11 108.198 O5 C4 H11 125.571
H6 C1 H7 108.315 H6 C1 H8 108.315
H7 C1 H8 108.351 H9 C2 H10 107.240
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.426      
2 C -0.080      
3 O -0.168      
4 C 0.143      
5 O -0.277      
6 H 0.138      
7 H 0.144      
8 H 0.144      
9 H 0.137      
10 H 0.137      
11 H 0.110      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.976 0.479 0.000 2.034
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.276 4.181 0.000
y 4.181 -29.050 0.000
z 0.000 0.000 -28.935
Traceless
 xyz
x -3.283 4.181 0.000
y 4.181 1.556 0.000
z 0.000 0.000 1.728
Polar
3z2-r23.456
x2-y2-3.226
xy4.181
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.709 0.405 0.000
y 0.405 6.020 0.000
z 0.000 0.000 4.641


<r2> (average value of r2) Å2
<r2> 136.382
(<r2>)1/2 11.678