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: CCSD(T)/cc-pVTZ

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(T)/cc-pVTZ
 hartrees
Energy at 0K-245.638937
Energy at 298.15K 
HF Energy-244.672631
Nuclear repulsion energy161.722972
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(T)/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3298 3215        
2 A' 3271 3189        
3 A' 3258 3176        
4 A' 1595 1555        
5 A' 1467 1430        
6 A' 1401 1365        
7 A' 1245 1213        
8 A' 1160 1131        
9 A' 1121 1093        
10 A' 1043 1017        
11 A' 927 904        
12 A' 908 885        
13 A' 885 863        
14 A" 905 883        
15 A" 874 852        
16 A" 781 762        
17 A" 638 622        
18 A" 601 585        

Unscaled Zero Point Vibrational Energy (zpe) 12689.7 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 12369.9 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 CCSD(T)/cc-pVTZ
ABC
0.32592 0.31974 0.16140

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.130 0.369 0.000
C2 0.620 -0.962 0.000
C3 0.000 1.126 0.000
N4 -0.694 -0.994 0.000
O5 -1.097 0.346 0.000
H6 2.154 0.699 0.000
H7 1.159 -1.896 0.000
H8 -0.179 2.188 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42581.35992.27702.22701.07532.26512.2411
C21.42582.17761.31382.15762.26101.07843.2497
C31.35992.17762.23021.34602.19553.23601.0774
N42.27701.31382.23021.39873.31272.06073.2232
O52.22702.15761.34601.39873.26963.17992.0583
H61.07532.26102.19553.31273.26962.77882.7677
H72.26511.07843.23602.06073.17992.77884.2974
H82.24113.24971.07743.22322.05832.76774.2974

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.375 C1 C2 H7 129.000
C1 C3 O5 110.779 C1 C3 H8 133.378
C2 C1 C3 102.814 C2 C1 H6 128.836
C2 N4 O5 105.350 C3 C1 H6 128.350
C3 O5 N4 108.682 N4 C2 H7 118.625
O5 C3 H8 115.842
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability