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All results from a given calculation for C3H3NO (Isoxazole)

using model chemistry: CCD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/6-31G(2df,p)
 hartrees
Energy at 0K-245.482153
Energy at 298.15K 
HF Energy-244.611181
Nuclear repulsion energy162.833419
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 CCD/6-31G(2df,p)
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' 3351 3174 0.45      
2 A' 3321 3146 0.34      
3 A' 3307 3133 0.86      
4 A' 1651 1564 7.57      
5 A' 1512 1432 27.30      
6 A' 1434 1358 10.61      
7 A' 1284 1216 7.47      
8 A' 1210 1146 17.27      
9 A' 1149 1088 8.34      
10 A' 1064 1008 2.54      
11 A' 995 943 37.28      
12 A' 942 892 5.23      
13 A' 937 887 2.07      
14 A" 931 882 5.12      
15 A" 901 853 0.31      
16 A" 810 767 47.08      
17 A" 661 626 1.43      
18 A" 618 585 12.91      

Unscaled Zero Point Vibrational Energy (zpe) 13037.8 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 12349.4 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 CCD/6-31G(2df,p)
ABC
0.33039 0.32404 0.16359

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.126 0.370 0.000
C2 0.614 -0.960 0.000
C3 0.000 1.119 0.000
N4 -0.693 -0.977 0.000
O5 -1.087 0.337 0.000
H6 2.149 0.699 0.000
H7 1.149 -1.896 0.000
H8 -0.190 2.179 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42531.35262.26382.21361.07492.26582.2373
C21.42532.16741.30672.13852.26121.07853.2401
C31.35262.16742.20771.33912.18993.22641.0770
N42.26381.30672.20771.37173.30022.05883.1960
O52.21362.13851.33911.37173.25663.16012.0490
H61.07492.26122.18993.30023.25662.78142.7679
H72.26581.07853.22642.05883.16012.78144.2893
H82.23733.24011.07703.19602.04902.76794.2893

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 111.843 C1 C2 H7 129.119
C1 C3 O5 110.642 C1 C3 H8 133.782
C2 C1 C3 102.535 C2 C1 H6 128.951
C2 N4 O5 105.931 C3 C1 H6 128.514
C3 O5 N4 109.048 N4 C2 H7 119.038
O5 C3 H8 115.575
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability