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All results from a given calculation for C3H3NO (Isoxazole)

using model chemistry: QCISD(T)/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(T)/cc-pVDZ
 hartrees
Energy at 0K-245.401709
Energy at 298.15K 
HF Energy-244.602238
Nuclear repulsion energy160.475310
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(T)/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' 3301 3146        
2 A' 3277 3123        
3 A' 3257 3104        
4 A' 1597 1522        
5 A' 1474 1405        
6 A' 1392 1327        
7 A' 1231 1173        
8 A' 1147 1093        
9 A' 1115 1062        
10 A' 1033 984        
11 A' 918 875        
12 A' 901 859        
13 A' 866 825        
14 A" 880 838        
15 A" 850 810        
16 A" 769 733        
17 A" 627 598        
18 A" 593 565        

Unscaled Zero Point Vibrational Energy (zpe) 12613.2 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 12021.6 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(T)/cc-pVDZ
ABC
0.32083 0.31495 0.15893

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.142 0.371 0.000
C2 0.621 -0.971 0.000
C3 0.000 1.134 0.000
N4 -0.704 -0.997 0.000
O5 -1.102 0.348 0.000
H6 2.181 0.703 0.000
H7 1.164 -1.920 0.000
H8 -0.184 2.209 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.43891.37372.29762.24471.09012.29052.2675
C21.43892.19391.32512.17032.28721.09353.2805
C31.37372.19392.24411.35332.22283.26771.0916
N42.29761.32512.24411.40353.34802.08323.2486
O52.24472.17031.35331.40353.30203.20642.0751
H61.09012.28722.22283.34803.30202.81252.8043
H72.29051.09353.26772.08323.20642.81254.3439
H82.26753.28051.09163.24862.07512.80434.3439

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.392 C1 C2 H7 128.994
C1 C3 O5 110.798 C1 C3 H8 133.464
C2 C1 C3 102.505 C2 C1 H6 128.966
C2 N4 O5 105.341 C3 C1 H6 128.529
C3 O5 N4 108.964 N4 C2 H7 118.614
O5 C3 H8 115.738
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability