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All results from a given calculation for C3H3NO (Isoxazole)

using model chemistry: CCSD/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 CCSD/6-31G*
 hartrees
Energy at 0K-245.330654
Energy at 298.15K 
HF Energy-244.584684
Nuclear repulsion energy161.622729
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 CCSD/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' 3324 3139 0.10      
2 A' 3302 3118 0.07      
3 A' 3282 3099 2.05      
4 A' 1656 1564 8.11      
5 A' 1523 1438 32.54      
6 A' 1436 1356 9.50      
7 A' 1282 1210 6.67      
8 A' 1192 1125 20.49      
9 A' 1143 1079 8.47      
10 A' 1071 1011 4.17      
11 A' 947 894 22.28      
12 A' 927 876 0.06      
13 A' 922 871 19.30      
14 A" 888 839 7.62      
15 A" 854 807 4.69      
16 A" 777 734 46.77      
17 A" 639 603 1.41      
18 A" 597 563 18.08      

Unscaled Zero Point Vibrational Energy (zpe) 12879.9 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 12162.5 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 CCSD/6-31G*
ABC
0.32641 0.31863 0.16124

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.128 0.374 0.000
C2 0.620 -0.961 0.000
C3 0.000 1.128 0.000
N4 -0.691 -0.996 0.000
O5 -1.098 0.341 0.000
H6 2.157 0.703 0.000
H7 1.169 -1.896 0.000
H8 -0.189 2.194 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42851.35642.27772.22561.08092.27052.2457
C21.42852.17911.31182.15512.26541.08403.2565
C31.35642.17912.23431.35102.19883.24191.0820
N42.27771.31182.23431.39753.31712.06613.2293
O52.22562.15511.35101.39753.27523.18412.0637
H61.08092.26542.19883.31713.27522.78032.7798
H72.27051.08403.24192.06613.18412.78034.3088
H82.24573.25651.08203.22932.06372.77984.3088

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.370 C1 C2 H7 128.767
C1 C3 O5 110.580 C1 C3 H8 133.828
C2 C1 C3 102.948 C2 C1 H6 128.515
C2 N4 O5 105.352 C3 C1 H6 128.537
C3 O5 N4 108.751 N4 C2 H7 118.863
O5 C3 H8 115.592
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability