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 C3H3NO (Oxazole)

using model chemistry: HF/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/CEP-31G*
 hartrees
Energy at 0K-43.556102
Energy at 298.15K-43.560914
HF Energy-43.556102
Nuclear repulsion energy84.834470
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/CEP-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' 3506 3148 3.25      
2 A' 3486 3131 5.65      
3 A' 3467 3114 6.22      
4 A' 1763 1583 32.26      
5 A' 1702 1528 43.11      
6 A' 1494 1341 12.32      
7 A' 1382 1241 0.91      
8 A' 1291 1160 40.86      
9 A' 1220 1095 13.88      
10 A' 1192 1070 10.22      
11 A' 1159 1041 58.06      
12 A' 999 897 12.12      
13 A' 978 878 24.46      
14 A" 1016 912 3.69      
15 A" 983 883 12.92      
16 A" 866 778 54.92      
17 A" 702 630 35.77      
18 A" 657 590 9.38      

Unscaled Zero Point Vibrational Energy (zpe) 13931.2 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 12510.2 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 HF/CEP-31G*
ABC
0.33876 0.32621 0.16618

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.090 0.310 0.000
C2 0.000 1.090 0.000
N3 1.117 0.469 0.000
C4 0.752 -0.876 0.000
C5 -0.602 -0.962 0.000
H6 -0.165 2.152 0.000
H7 1.481 -1.665 0.000
H8 -1.316 -1.761 0.000

Atom - Atom Distances (Å)
  O1 C2 N3 C4 C5 H6 H7 H8
O11.33972.21262.19081.36222.06043.24202.0841
C21.33971.27822.10472.13801.07473.12763.1403
N32.21261.27821.39332.23652.11582.16443.3008
C42.19082.10471.39331.35703.16351.07422.2500
C51.36222.13802.23651.35703.14392.19871.0722
H62.06041.07472.11583.16353.14394.15654.0789
H73.24203.12762.16441.07422.19874.15652.7990
H82.08413.14033.30082.25001.07224.07892.7990

picture of Oxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 N3 115.353 O1 C2 H6 116.738
O1 C5 C4 107.348 O1 C5 H8 117.264
C2 O1 C5 104.606 C2 N3 C4 103.880
N3 C2 H6 127.909 N3 C4 C5 108.813
N3 C4 H7 122.074 C4 C5 H8 135.388
C5 C4 H7 129.113
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.117      
2 C -0.337      
3 N 0.087      
4 C -0.297      
5 C -0.113      
6 H 0.239      
7 H 0.267      
8 H 0.271      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.384 -0.861 0.000 1.630
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.743 -1.413 0.000
y -1.413 -22.110 0.000
z 0.000 0.000 -30.195
Traceless
 xyz
x -5.591 -1.413 0.000
y -1.413 8.859 0.000
z 0.000 0.000 -3.268
Polar
3z2-r2-6.536
x2-y2-9.633
xy-1.413
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.931 0.034 0.000
y 0.034 5.981 0.000
z 0.000 0.000 3.072


<r2> (average value of r2) Å2
<r2> 62.286
(<r2>)1/2 7.892