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 (Isoxazole)

using model chemistry: QCISD/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-245.370709
Energy at 298.15K 
HF Energy-244.604325
Nuclear repulsion energy161.126929
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/cc-pVDZ
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' 3322 3187 0.13      
2 A' 3297 3163 0.09      
3 A' 3278 3145 1.51      
4 A' 1635 1568 9.94      
5 A' 1507 1446 33.73      
6 A' 1413 1356 9.24      
7 A' 1255 1204 7.99      
8 A' 1166 1118 22.57      
9 A' 1127 1081 7.78      
10 A' 1043 1001 4.68      
11 A' 932 894 14.62      
12 A' 915 878 0.27      
13 A' 906 869 21.36      
14 A" 908 871 5.81      
15 A" 883 847 0.45      
16 A" 785 754 47.91      
17 A" 639 613 2.29      
18 A" 601 576 14.96      

Unscaled Zero Point Vibrational Energy (zpe) 12805.2 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 12285.3 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/cc-pVDZ
ABC
0.32383 0.31708 0.16021

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.138 0.372 0.000
C2 0.617 -0.969 0.000
C3 0.000 1.129 0.000
N4 -0.700 -0.991 0.000
O5 -1.098 0.344 0.000
H6 2.175 0.704 0.000
H7 1.159 -1.916 0.000
H8 -0.186 2.203 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.43851.36712.28862.23631.08832.28832.2596
C21.43852.18671.31692.15962.28551.09173.2719
C31.36712.18672.23321.34972.21603.25861.0899
N42.28861.31692.23321.39373.33712.07633.2359
O52.23632.15961.34971.39373.29233.19432.0710
H61.08832.28552.21603.33713.29232.80982.7963
H72.28831.09173.25862.07633.19432.80984.3334
H82.25963.27191.08993.23592.07102.79634.3334

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.242 C1 C2 H7 128.962
C1 C3 O5 110.796 C1 C3 H8 133.432
C2 C1 C3 102.384 C2 C1 H6 128.994
C2 N4 O5 105.603 C3 C1 H6 128.622
C3 O5 N4 108.975 N4 C2 H7 118.795
O5 C3 H8 115.772
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability