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 C4H5NO (3-Methylisoxazole)

using model chemistry: B3LYP/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3LYP/aug-cc-pVTZ
 hartrees
Energy at 0K-285.466225
Energy at 298.15K-285.472699
HF Energy-285.466225
Nuclear repulsion energy223.602134
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 B3LYP/aug-cc-pVTZ
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 3270 3164 0.18      
2 A 3249 3143 0.01      
3 A 3128 3027 5.88      
4 A 3089 2988 10.25      
5 A 3039 2940 14.77      
6 A 1613 1560 30.63      
7 A 1496 1448 11.75      
8 A 1485 1437 7.57      
9 A 1477 1429 7.80      
10 A 1439 1392 41.51      
11 A 1411 1365 3.35      
12 A 1295 1253 3.14      
13 A 1147 1110 19.77      
14 A 1085 1050 10.25      
15 A 1069 1034 1.70      
16 A 1035 1002 2.53      
17 A 978 946 1.89      
18 A 929 899 0.23      
19 A 896 867 0.55      
20 A 887 859 27.82      
21 A 791 765 49.65      
22 A 669 647 0.07      
23 A 658 637 5.87      
24 A 612 592 4.00      
25 A 338 327 6.79      
26 A 275 266 4.95      
27 A 123 119 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 18740.8 cm-1
Scaled (by 0.9675) Zero Point Vibrational Energy (zpe) 18131.7 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 B3LYP/aug-cc-pVTZ
ABC
0.30796 0.11758 0.08646

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.128 0.026 0.000
H2 2.515 0.541 0.881
H3 2.502 -0.995 0.000
H4 2.515 0.541 -0.880
C5 -1.482 0.574 0.000
O6 -1.380 -0.763 0.000
N7 -0.023 -1.105 -0.000
C8 0.636 0.026 0.000
C9 -0.254 1.139 -0.000
H10 -0.007 2.185 -0.000
H11 -2.482 0.972 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 C9 H10 H11
C11.09081.08761.09083.65103.59582.43061.49192.62913.03604.7060
H21.09081.77051.76094.09274.20093.15092.13812.96663.13655.0923
H31.08761.77051.77054.28163.88922.52752.12693.48574.05065.3580
H41.09081.76091.77054.09274.20093.15082.13802.96653.13655.0924
C53.65104.09274.28164.09271.34062.22432.18761.35162.18441.0764
O63.59584.20093.88924.20091.34061.39972.16502.21043.25222.0545
N72.43063.15092.52753.15082.22431.39971.30912.25643.29063.2186
C81.49192.13812.12692.13802.18762.16501.30911.42552.25313.2584
C92.62912.96663.48572.96651.35162.21042.25641.42551.07472.2345
H103.03603.13654.05063.13652.18443.25223.29062.25311.07472.7570
H114.70605.09235.35805.09241.07642.05453.21863.25842.23452.7570

picture of 3-Methylisoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C8 N7 120.257 C1 C8 C9 128.610
H2 C1 H3 108.723 H2 C1 H4 107.634
H2 C1 C8 110.796 H3 C1 H4 108.723
H3 C1 C8 110.094 H4 C1 C8 110.795
C5 O6 N7 108.510 C5 C9 C8 103.912
C5 C9 H10 128.021 O6 C5 C9 110.380
O6 C5 H11 116.002 O6 N7 C8 106.065
N7 C8 C9 111.133 C8 C9 H10 128.067
C9 C5 H11 133.618
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability