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: PBEPBEultrafine/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 PBEPBEultrafine/6-31G**
 hartrees
Energy at 0K-268.071972
Energy at 298.15K-268.079018
HF Energy-268.071972
Nuclear repulsion energy176.239052
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**
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' 3081 3039 16.60      
2 A' 2998 2957 16.31      
3 A' 2996 2955 10.08      
4 A' 2964 2923 74.34      
5 A' 1773 1748 246.19      
6 A' 1478 1458 6.60      
7 A' 1461 1441 2.70      
8 A' 1384 1365 13.40      
9 A' 1358 1339 0.90      
10 A' 1342 1324 4.36      
11 A' 1173 1156 328.77      
12 A' 1105 1090 9.65      
13 A' 1013 999 23.24      
14 A' 834 823 8.61      
15 A' 770 760 1.95      
16 A' 369 364 5.90      
17 A' 219 216 6.41      
18 A" 3086 3044 24.94      
19 A" 3040 2998 11.57      
20 A" 1452 1432 5.99      
21 A" 1253 1235 0.62      
22 A" 1142 1126 4.61      
23 A" 985 972 0.00      
24 A" 785 774 1.51      
25 A" 354 349 17.23      
26 A" 235 232 1.55      
27 A" 47 46 0.55      

Unscaled Zero Point Vibrational Energy (zpe) 19347.3 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 19082.2 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 PBEPBEultrafine/6-31G**
ABC
0.58277 0.09546 0.08466

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.190 -0.265 0.000
C2 -0.702 -0.563 0.000
O3 0.000 0.715 0.000
C4 1.349 0.621 0.000
O5 1.997 -0.409 0.000
H6 -2.759 -1.208 0.000
H7 -2.478 0.312 0.893
H8 -2.478 0.312 -0.893
H9 -0.389 -1.137 -0.889
H10 -0.389 -1.137 0.889
H11 1.773 1.648 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51722.39913.64804.18951.10161.10111.10112.18932.18934.4001
C21.51721.45792.36812.70372.15542.17132.17131.10321.10323.3184
O32.39911.45791.35222.29183.36292.66452.66452.09032.09032.0032
C43.64802.36811.35221.21704.49643.94173.94172.62652.62651.1109
O54.18952.70372.29181.21704.82244.61974.61972.64802.64802.0691
H61.10162.15543.36294.49644.82241.78501.78502.53182.53185.3564
H71.10112.17132.66453.94174.61971.78501.78563.10392.54184.5443
H81.10112.17132.66453.94174.61971.78501.78562.54183.10394.5443
H92.18931.10322.09032.62652.64802.53183.10392.54181.77713.6353
H102.18931.10322.09032.62652.64802.53182.54183.10391.77713.6353
H114.40013.31842.00321.11092.06915.35644.54434.54433.63533.6353

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 107.470 C1 C2 H9 112.370
C1 C2 H10 112.370 C2 C1 H6 109.760
C2 C1 H7 111.053 C2 C1 H8 111.053
C2 O3 C4 114.799 O3 C2 H9 108.611
O3 C2 H10 108.611 O3 C4 O5 126.175
O3 C4 H11 108.434 O5 C4 H11 125.391
H6 C1 H7 108.262 H6 C1 H8 108.262
H7 C1 H8 108.361 H9 C2 H10 107.305
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.391      
2 C -0.013      
3 O -0.378      
4 C 0.380      
5 O -0.396      
6 H 0.132      
7 H 0.141      
8 H 0.141      
9 H 0.140      
10 H 0.140      
11 H 0.103      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.002 0.454 0.000 2.052
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.242 4.372 0.000
y 4.372 -29.153 0.000
z 0.000 0.000 -29.073
Traceless
 xyz
x -3.128 4.372 0.000
y 4.372 1.504 0.000
z 0.000 0.000 1.624
Polar
3z2-r23.248
x2-y2-3.089
xy4.372
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.423 0.338 0.000
y 0.338 5.854 0.000
z 0.000 0.000 4.355


<r2> (average value of r2) Å2
<r2> 136.916
(<r2>)1/2 11.701