return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2=FULL/6-31G**

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 MP2=FULL/6-31G**
 hartrees
Energy at 0K-267.635950
Energy at 298.15K-267.643223
HF Energy-266.835521
Nuclear repulsion energy177.644489
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 MP2=FULL/6-31G**
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' 3245 3032 15.82      
2 A' 3157 2950 48.17      
3 A' 3154 2947 27.72      
4 A' 3146 2939 11.82      
5 A' 1816 1697 244.44      
6 A' 1578 1474 6.11      
7 A' 1561 1458 2.29      
8 A' 1481 1384 17.95      
9 A' 1437 1342 0.80      
10 A' 1433 1339 7.47      
11 A' 1251 1168 402.63      
12 A' 1172 1095 7.02      
13 A' 1074 1004 13.98      
14 A' 886 828 11.50      
15 A' 798 745 3.99      
16 A' 389 363 5.95      
17 A' 234 219 6.95      
18 A" 3256 3042 23.06      
19 A" 3214 3003 12.95      
20 A" 1550 1448 4.84      
21 A" 1333 1246 0.70      
22 A" 1221 1141 4.95      
23 A" 1054 985 0.21      
24 A" 836 781 0.30      
25 A" 358 334 20.92      
26 A" 254 237 2.72      
27 A" 70 65 0.40      

Unscaled Zero Point Vibrational Energy (zpe) 20477.2 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 19133.9 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 MP2=FULL/6-31G**
ABC
0.58825 0.09733 0.08618

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.172 -0.244 0.000
C2 -0.697 -0.556 0.000
O3 0.000 0.712 0.000
C4 1.341 0.609 0.000
O5 1.976 -0.426 0.000
H6 -2.745 -1.169 0.000
H7 -2.441 0.330 0.883
H8 -2.441 0.330 -0.883
H9 -0.395 -1.122 -0.880
H10 -0.395 -1.122 0.880
H11 1.775 1.613 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50772.37303.61554.15141.08781.08651.08652.16862.16864.3624
C21.50771.44742.34832.67572.13732.14592.14591.08861.08863.2894
O32.37301.44741.34542.28003.32732.62322.62322.07232.07231.9911
C43.61552.34831.34541.21434.45623.89373.89372.60532.60531.0936
O54.15142.67572.28001.21434.77824.56654.56652.62252.62252.0492
H61.08782.13733.32734.45624.77821.76571.76572.50932.50935.3076
H71.08652.14592.62323.89374.56651.76571.76503.06582.50884.4945
H81.08652.14592.62323.89374.56651.76571.76502.50883.06584.4945
H92.16861.08862.07232.60532.62252.50933.06582.50881.75913.6011
H102.16861.08862.07232.60532.62252.50932.50883.06581.75913.6011
H114.36243.28941.99111.09362.04925.30764.49454.49453.60113.6011

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 106.823 C1 C2 H9 112.280
C1 C2 H10 112.280 C2 C1 H6 109.805
C2 C1 H7 110.574 C2 C1 H8 110.574
C2 O3 C4 114.411 O3 C2 H9 108.784
O3 C2 H10 108.784 O3 C4 O5 125.853
O3 C4 H11 109.007 O5 C4 H11 125.140
H6 C1 H7 108.599 H6 C1 H8 108.599
H7 C1 H8 108.634 H9 C2 H10 107.798
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability