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All results from a given calculation for C3H3NO (Isoxazole)

using model chemistry: QCISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-245.333544
Energy at 298.15K 
HF Energy-244.584212
Nuclear repulsion energy161.425091
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 QCISD/6-31G*
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' 3321 3162 0.13      
2 A' 3299 3141 0.07      
3 A' 3277 3121 2.25      
4 A' 1652 1573 8.84      
5 A' 1519 1447 34.40      
6 A' 1430 1362 9.78      
7 A' 1278 1217 6.77      
8 A' 1186 1130 20.75      
9 A' 1135 1081 8.49      
10 A' 1068 1017 4.48      
11 A' 939 894 14.29      
12 A' 922 878 0.59      
13 A' 909 865 24.31      
14 A" 889 846 7.26      
15 A" 853 813 4.62      
16 A" 776 739 46.53      
17 A" 635 605 1.84      
18 A" 593 565 18.14      

Unscaled Zero Point Vibrational Energy (zpe) 12840.4 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 12227.9 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 QCISD/6-31G*
ABC
0.32575 0.31775 0.16085

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.128 0.375 0.000
C2 0.621 -0.961 0.000
C3 0.000 1.129 0.000
N4 -0.691 -1.000 0.000
O5 -1.100 0.341 0.000
H6 2.158 0.704 0.000
H7 1.172 -1.895 0.000
H8 -0.189 2.195 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42901.35682.28062.22821.08112.27072.2464
C21.42902.18021.31262.15802.26581.08443.2579
C31.35682.18022.23871.35292.19943.24321.0823
N42.28061.31262.23871.40253.31982.06643.2341
O52.22822.15801.35291.40253.27803.18762.0650
H61.08112.26582.19943.31983.27802.77992.7807
H72.27071.08443.24322.06643.18762.77994.3103
H82.24643.25791.08233.23412.06502.78074.3103

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.506 C1 C2 H7 128.704
C1 C3 O5 110.634 C1 C3 H8 133.834
C2 C1 C3 102.971 C2 C1 H6 128.490
C2 N4 O5 105.229 C3 C1 H6 128.539
C3 O5 N4 108.660 N4 C2 H7 118.790
O5 C3 H8 115.532
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability