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

using model chemistry: HF/SDD

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 HF/SDD
 hartrees
Energy at 0K-266.744947
Energy at 298.15K-266.752225
HF Energy-266.744947
Nuclear repulsion energy176.234245
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 HF/SDD
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' 3371 3035 47.86 108.41 0.27 0.43
2 A' 3301 2973 56.26 53.13 0.72 0.83
3 A' 3269 2944 16.58 122.80 0.11 0.20
4 A' 3214 2894 32.49 135.66 0.02 0.03
5 A' 1838 1655 434.20 8.52 0.27 0.42
6 A' 1669 1503 13.65 4.66 0.62 0.76
7 A' 1650 1485 6.43 17.29 0.74 0.85
8 A' 1579 1422 18.78 2.38 0.53 0.69
9 A' 1543 1389 5.29 1.97 0.73 0.84
10 A' 1510 1359 12.83 5.94 0.50 0.66
11 A' 1312 1181 559.10 1.42 0.30 0.46
12 A' 1241 1118 10.29 10.10 0.23 0.37
13 A' 1114 1003 14.91 7.45 0.70 0.83
14 A' 896 807 27.31 14.12 0.26 0.41
15 A' 817 736 2.93 6.05 0.48 0.65
16 A' 395 355 8.50 2.06 0.38 0.55
17 A' 221 199 12.12 0.70 0.48 0.65
18 A" 3338 3005 71.62 7.12 0.75 0.86
19 A" 3308 2978 9.11 89.63 0.75 0.86
20 A" 1634 1472 8.45 15.80 0.75 0.86
21 A" 1417 1276 1.05 15.86 0.75 0.86
22 A" 1297 1168 10.02 1.68 0.75 0.86
23 A" 1149 1035 1.39 1.61 0.75 0.86
24 A" 896 807 0.59 0.17 0.75 0.86
25 A" 335 302 49.87 1.43 0.75 0.86
26 A" 240 216 6.24 0.55 0.75 0.86
27 A" 63 57 1.18 0.44 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 21309.4 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 19187.0 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 HF/SDD
ABC
0.61706 0.09277 0.08312

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.205 -0.286 0.000
C2 -0.724 -0.618 0.000
O3 0.000 0.654 0.000
C4 1.341 0.669 0.000
O5 2.050 -0.316 0.000
H6 -2.787 -1.201 0.000
H7 -2.467 0.290 0.878
H8 -2.467 0.290 -0.878
H9 -0.429 -1.176 -0.877
H10 -0.429 -1.176 0.877
H11 1.711 1.681 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51792.39683.67244.25501.08431.08221.08222.17202.17204.3819
C21.51791.46362.43362.79032.14372.15292.15291.08041.08043.3489
O32.39681.46361.34102.26753.34752.64382.64382.07352.07351.9955
C43.67242.43361.34101.21384.53183.92633.92632.70282.70281.0771
O54.25502.79032.26751.21384.91724.64134.64132.76602.76602.0255
H61.08432.14373.34754.53184.91721.75941.75942.51652.51655.3417
H71.08222.15292.64383.92634.64131.75941.75573.06352.51114.4899
H81.08222.15292.64383.92634.64131.75941.75572.51113.06354.4899
H92.17201.08042.07352.70282.76602.51653.06352.51111.75413.6752
H102.17201.08042.07352.70282.76602.51652.51113.06351.75413.6752
H114.38193.34891.99551.07712.02555.34174.48994.48993.67523.6752

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 106.989 C1 C2 H9 112.329
C1 C2 H10 112.329 C2 C1 H6 109.809
C2 C1 H7 110.670 C2 C1 H8 110.670
C2 O3 C4 120.325 O3 C2 H9 108.244
O3 C2 H10 108.244 O3 C4 O5 125.059
O3 C4 H11 110.751 O5 C4 H11 124.189
H6 C1 H7 108.606 H6 C1 H8 108.606
H7 C1 H8 108.420 H9 C2 H10 108.544
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.552      
2 C -0.047      
3 O -0.485      
4 C 0.334      
5 O -0.408      
6 H 0.175      
7 H 0.195      
8 H 0.195      
9 H 0.197      
10 H 0.197      
11 H 0.200      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.379 0.654 0.000 2.468
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.068 6.709 0.000
y 6.709 -29.290 0.000
z 0.000 0.000 -29.510
Traceless
 xyz
x -5.669 6.709 0.000
y 6.709 2.999 0.000
z 0.000 0.000 2.669
Polar
3z2-r25.339
x2-y2-5.779
xy6.709
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.149 -0.016 0.000
y -0.016 5.105 0.000
z 0.000 0.000 3.841


<r2> (average value of r2) Å2
<r2> 139.469
(<r2>)1/2 11.810