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All results from a given calculation for C4H5NO (Isoxazole, 5-methyl-)

using model chemistry: HF/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF/3-21G*
 hartrees
Energy at 0K-282.040635
Energy at 298.15K-282.047357
Nuclear repulsion energy223.248828
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 HF/3-21G*
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 3487 3147 0.75      
2 A 3446 3110 3.26      
3 A 3300 2979 7.87      
4 A 3269 2950 5.71      
5 A 3215 2902 6.79      
6 A 1769 1596 44.48      
7 A 1652 1491 15.01      
8 A 1646 1486 8.47      
9 A 1625 1467 41.76      
10 A 1588 1433 6.18      
11 A 1471 1328 8.31      
12 A 1352 1221 22.06      
13 A 1293 1167 20.41      
14 A 1220 1101 16.37      
15 A 1137 1026 1.31      
16 A 1111 1003 13.91      
17 A 1088 982 0.30      
18 A 1045 943 12.36      
19 A 1018 919 6.12      
20 A 972 878 61.03      
21 A 947 855 21.59      
22 A 724 654 2.78      
23 A 688 621 1.12      
24 A 667 602 1.04      
25 A 345 312 3.41      
26 A 273 247 4.65      
27 A 127 114 1.47      

Unscaled Zero Point Vibrational Energy (zpe) 20236.7 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 18265.6 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 HF/3-21G*
ABC
0.31194 0.11718 0.08653

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.114 0.011 0.000
H2 2.451 -0.530 -0.876
H3 2.553 0.999 -0.000
H4 2.451 -0.529 0.876
C5 0.629 0.102 -0.000
O6 -0.070 -1.066 0.000
N7 -1.481 -0.759 -0.000
C8 -1.525 0.533 0.000
H9 -2.471 1.024 0.000
C10 -0.227 1.137 -0.000
H11 0.002 2.175 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.08351.08051.08351.48812.43503.67693.67644.69512.59713.0234
H21.08351.76441.75232.11872.72234.03564.20845.23533.27363.7525
H31.08051.76441.76442.12313.33804.40084.10515.02402.78322.8095
H41.08351.75231.76442.11872.72234.03564.20815.23503.27333.7522
C51.48812.11872.12312.11871.36102.27892.19653.23341.34242.1651
O62.43502.72233.33802.72231.36101.44472.16193.18322.20853.2414
N73.67694.03564.40084.03562.27891.44471.29202.03892.27353.2870
C83.67644.20844.10514.20812.19652.16191.29201.06541.43262.2424
H94.69515.23535.02405.23503.23343.18322.03891.06542.24702.7270
C102.59713.27362.78323.27331.34242.20852.27351.43262.24701.0624
H113.02343.75252.80953.75222.16513.24143.28702.24242.72701.0624

picture of Isoxazole, 5-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 O6 117.370 C1 C5 C10 133.070
H2 C1 H3 109.239 H2 C1 H4 107.922
H2 C1 C5 109.956 H3 C1 H4 109.239
H3 C1 C5 110.489 H4 C1 C5 109.950
C5 O6 N7 108.594 C5 C10 C8 104.613
C5 C10 H11 128.021 O6 C5 C10 109.559
O6 N7 C8 104.226 N7 C8 H9 119.422
N7 C8 C10 113.008 C8 C10 H11 127.366
H9 C8 C10 127.569
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.638 -0.589    
2 H 0.256 0.171    
3 H 0.232 0.182    
4 H 0.256 0.171    
5 C 0.487 0.639    
6 O -0.535 -0.241    
7 N -0.231 -0.416    
8 C 0.113 0.447    
9 H 0.287 0.069    
10 C -0.481 -0.662    
11 H 0.254 0.229    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.914 3.343 0.000 3.852
CHELPG 1.872 3.295 0.000 3.790
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.701 -4.255 -0.000
y -4.255 -36.954 -0.000
z -0.000 -0.000 -36.863
Traceless
 xyz
x 6.208 -4.255 -0.000
y -4.255 -3.172 -0.000
z -0.000 -0.000 -3.036
Polar
3z2-r2-6.071
x2-y26.253
xy-4.255
xz-0.000
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.101 -0.578 -0.000
y -0.578 6.521 0.000
z -0.000 0.000 3.035


<r2> (average value of r2) Å2
<r2> 136.766
(<r2>)1/2 11.695