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: MP2/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 MP2/CEP-31G
 hartrees
Energy at 0K-43.862632
Energy at 298.15K-43.867036
HF Energy-43.410090
Nuclear repulsion energy81.080660
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/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' 3330 3218 0.15      
2 A' 3320 3208 2.83      
3 A' 3284 3173 1.91      
4 A' 1474 1424 2.21      
5 A' 1404 1356 20.70      
6 A' 1286 1243 15.62      
7 A' 1228 1187 1.33      
8 A' 1125 1087 25.80      
9 A' 1042 1007 0.67      
10 A' 1013 979 22.89      
11 A' 983 950 39.13      
12 A' 871 841 18.04      
13 A' 848 819 28.67      
14 A" 798 771 1.11      
15 A" 787 761 83.82      
16 A" 714 690 28.39      
17 A" 634 613 21.99      
18 A" 586 567 7.49      

Unscaled Zero Point Vibrational Energy (zpe) 12362.8 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 11946.2 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 MP2/CEP-31G
ABC
0.30916 0.29636 0.15131

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.134 0.320 0.000
C2 0.000 1.161 0.000
N3 1.157 0.477 0.000
C4 0.787 -0.918 0.000
C5 -0.627 -1.011 0.000
H6 -0.165 2.237 0.000
H7 1.530 -1.713 0.000
H8 -1.351 -1.822 0.000

Atom - Atom Distances (Å)
  O1 C2 N3 C4 C5 H6 H7 H8
O11.41202.29692.28501.42412.14823.35182.1528
C21.41201.34422.22252.26041.08843.25633.2746
N32.29691.34421.44312.32332.20092.22193.4026
C42.28502.22251.44311.41693.29481.08922.3212
C51.42412.26042.32331.41693.28042.26911.0872
H62.14821.08842.20093.29483.28044.29844.2286
H73.35183.25632.22191.08922.26914.29842.8836
H82.15283.27463.40262.32121.08724.22862.8836

picture of Oxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 N3 112.865 O1 C2 H6 117.859
O1 C5 C4 107.090 O1 C5 H8 117.389
C2 O1 C5 105.696 C2 N3 C4 105.698
N3 C2 H6 129.276 N3 C4 C5 108.651
N3 C4 H7 122.047 C4 C5 H8 135.521
C5 C4 H7 129.301
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability