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: CISD/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 CISD/3-21G
 hartrees
Energy at 0K-243.693977
Energy at 298.15K-243.698657
HF Energy-243.249004
Nuclear repulsion energy160.717369
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 CISD/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' 3415 3214 0.21      
2 A' 3395 3196 0.02      
3 A' 3380 3182 1.27      
4 A' 1600 1506 4.38      
5 A' 1551 1460 21.78      
6 A' 1385 1303 14.55      
7 A' 1323 1246 0.05      
8 A' 1205 1134 11.77      
9 A' 1088 1025 28.80      
10 A' 1062 1000 13.26      
11 A' 1038 977 16.13      
12 A' 938 883 4.83      
13 A' 923 869 45.09      
14 A" 951 895 0.12      
15 A" 915 861 20.48      
16 A" 834 785 44.83      
17 A" 678 638 25.31      
18 A" 633 596 21.07      

Unscaled Zero Point Vibrational Energy (zpe) 13156.7 cm-1
Scaled (by 0.9413) Zero Point Vibrational Energy (zpe) 12384.4 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 CISD/3-21G
ABC
0.32212 0.31611 0.15954

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 1.145 0.000
C2 1.106 0.309 0.000
N3 0.760 -0.946 0.000
C4 -0.664 -0.972 0.000
C5 -1.123 0.303 0.000
H6 2.080 0.752 0.000
H7 -1.220 -1.888 0.000
H8 -2.090 0.760 0.000

Atom - Atom Distances (Å)
  O1 C2 N3 C4 C5 H6 H7 H8
O11.38612.22532.21941.40392.11683.26892.1254
C21.38611.30232.18512.22871.07003.19893.2273
N32.22531.30231.42422.25972.15062.19193.3215
C42.21942.18511.42421.35543.24061.07062.2435
C51.40392.22872.25971.35543.23432.19271.0694
H62.11681.07002.15063.24063.23434.22524.1700
H73.26893.19892.19191.07062.19274.22522.7867
H82.12543.22733.32152.24351.06944.17002.7867

picture of Oxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 N3 111.698 O1 C2 H6 118.492
O1 C5 C4 107.076 O1 C5 H8 117.846
C2 O1 C5 106.036 C2 N3 C4 106.448
N3 C2 H6 129.810 N3 C4 C5 108.742
N3 C4 H7 122.308 C4 C5 H8 135.078
C5 C4 H7 128.950
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability