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All results from a given calculation for C3H3NO (Isoxazole)

using model chemistry: CCSD/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 CCSD/6-31G(2df,p)
 hartrees
Energy at 0K-245.489739
Energy at 298.15K 
HF Energy-244.610721
Nuclear repulsion energy162.505433
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(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' 3343 3161 0.36      
2 A' 3314 3133 0.21      
3 A' 3299 3120 0.88      
4 A' 1643 1553 8.59      
5 A' 1505 1423 30.30      
6 A' 1426 1348 11.81      
7 A' 1276 1207 6.98      
8 A' 1194 1129 19.27      
9 A' 1141 1079 8.31      
10 A' 1060 1003 3.39      
11 A' 959 907 31.53      
12 A' 935 884 5.00      
13 A' 930 879 3.49      
14 A" 932 881 4.80      
15 A" 900 851 0.86      
16 A" 804 760 45.42      
17 A" 654 618 2.26      
18 A" 612 578 13.53      

Unscaled Zero Point Vibrational Energy (zpe) 12963.2 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 12256.7 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(2df,p)
ABC
0.32917 0.32267 0.16294

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.128 0.371 0.000
C2 0.614 -0.960 0.000
C3 0.000 1.120 0.000
N4 -0.693 -0.984 0.000
O5 -1.090 0.340 0.000
H6 2.151 0.700 0.000
H7 1.153 -1.895 0.000
H8 -0.188 2.180 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42671.35382.26902.21791.07522.26592.2374
C21.42672.16871.30722.14372.26261.07893.2416
C31.35382.16872.21421.33992.19193.22761.0774
N42.26901.30722.21421.38193.30502.05863.2041
O52.21792.14371.33991.38193.26123.16652.0496
H61.07522.26262.19193.30503.26122.78052.7682
H72.26591.07893.22762.05863.16652.78054.2904
H82.23743.24161.07743.20412.04962.76824.2904

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.116 C1 C2 H7 128.942
C1 C3 O5 110.846 C1 C3 H8 133.613
C2 C1 C3 102.483 C2 C1 H6 128.933
C2 N4 O5 105.684 C3 C1 H6 128.584
C3 O5 N4 108.871 N4 C2 H7 118.942
O5 C3 H8 115.540
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability