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: CID/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CID/3-21G
 hartrees
Energy at 0K-243.689718
Energy at 298.15K-243.694407
HF Energy-243.249221
Nuclear repulsion energy160.860501
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 CID/3-21G
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' 3418 3184 0.19      
2 A' 3398 3166 0.01      
3 A' 3383 3152 1.17      
4 A' 1603 1494 4.28      
5 A' 1554 1448 21.72      
6 A' 1388 1293 14.20      
7 A' 1325 1235 0.07      
8 A' 1207 1125 13.26      
9 A' 1099 1024 28.71      
10 A' 1069 996 16.65      
11 A' 1043 972 14.42      
12 A' 943 878 6.33      
13 A' 927 864 43.15      
14 A" 952 886 0.14      
15 A" 915 853 20.37      
16 A" 835 778 44.71      
17 A" 680 633 25.37      
18 A" 635 592 21.21      

Unscaled Zero Point Vibrational Energy (zpe) 13186.6 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 12284.7 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 CID/3-21G
ABC
0.32270 0.31669 0.15984

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 1.144 0.000
C2 1.105 0.309 0.000
N3 0.759 -0.946 0.000
C4 -0.664 -0.972 0.000
C5 -1.122 0.303 0.000
H6 2.079 0.751 0.000
H7 -1.219 -1.887 0.000
H8 -2.089 0.760 0.000

Atom - Atom Distances (Å)
  O1 C2 N3 C4 C5 H6 H7 H8
O11.38472.22312.21731.40232.11593.26682.1242
C21.38471.30162.18392.22721.06983.19773.2257
N32.22311.30161.42332.25822.14982.19113.3199
C42.21732.18391.42331.35483.23931.07052.2427
C51.40232.22722.25821.35483.23262.19211.0693
H62.11591.06982.14983.23933.23264.22374.1683
H73.26683.19772.19111.07052.19214.22372.7858
H82.12423.22573.31992.24271.06934.16832.7858

picture of Oxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 N3 111.666 O1 C2 H6 118.529
O1 C5 C4 107.061 O1 C5 H8 117.879
C2 O1 C5 106.096 C2 N3 C4 106.453
N3 C2 H6 129.805 N3 C4 C5 108.724
N3 C4 H7 122.317 C4 C5 H8 135.060
C5 C4 H7 128.959
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability