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: PBEPBEultrafine/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-285.023113
Energy at 298.15K-285.029403
Nuclear repulsion energy221.712269
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 PBEPBEultrafine/6-31G*
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 3226 3173 0.90      
2 A 3204 3151 0.48      
3 A 3094 3043 5.32      
4 A 3057 3006 11.01      
5 A 2994 2945 15.03      
6 A 1575 1549 22.20      
7 A 1475 1451 10.54      
8 A 1464 1439 8.35      
9 A 1452 1428 14.15      
10 A 1417 1393 28.58      
11 A 1383 1360 0.61      
12 A 1263 1242 1.03      
13 A 1125 1106 14.59      
14 A 1058 1040 9.96      
15 A 1038 1021 3.68      
16 A 1008 991 1.88      
17 A 958 942 1.21      
18 A 912 897 1.24      
19 A 865 851 22.87      
20 A 810 797 0.08      
21 A 753 741 39.35      
22 A 647 637 4.55      
23 A 641 630 0.34      
24 A 596 586 3.34      
25 A 326 320 6.22      
26 A 263 259 4.84      
27 A 127 124 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 18364.8 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 18061.8 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 PBEPBEultrafine/6-31G*
ABC
0.30119 0.11620 0.08520

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.138 0.024 0.000
H2 -2.538 0.540 -0.890
H3 -2.509 -1.012 -0.000
H4 -2.538 0.540 0.890
C5 1.492 0.580 -0.000
O6 1.389 -0.770 -0.000
N7 0.024 -1.119 0.000
C8 -0.639 0.032 -0.000
C9 0.251 1.154 0.000
H10 -0.000 2.212 0.000
H11 2.507 0.974 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 C9 H10 H11
C11.10371.10061.10373.67213.61502.44581.49882.64293.05934.7415
H21.10371.78931.77994.12714.23403.17952.15762.99153.16705.1416
H31.10061.78931.78934.30583.90512.53542.14153.50844.08555.3951
H41.10371.77991.78934.12714.23403.17942.15752.99153.16705.1417
C53.67214.12714.30584.12711.35382.24492.20031.36672.21131.0893
O63.61504.23403.90514.23401.35381.40842.18092.23473.28972.0716
N72.44583.17952.53543.17942.24491.40841.32872.28383.33123.2473
C81.49882.15762.14152.15752.20032.18091.32871.43202.27183.2845
C92.64292.99153.50842.99151.36672.23472.28381.43201.08802.2633
H103.05933.16704.08553.16702.21133.28973.33122.27181.08802.7967
H114.74155.14165.39515.14171.08932.07163.24733.28452.26332.7967

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 119.648 C1 C8 C9 128.766
H2 C1 H3 108.538 H2 C1 H4 107.483
H2 C1 C8 111.092 H3 C1 H4 108.538
H3 C1 C8 110.003 H4 C1 C8 111.091
C5 O6 N7 108.709 C5 C9 C8 103.634
C5 C9 H10 128.174 O6 C5 C9 110.455
O6 C5 H11 115.551 O6 N7 C8 105.615
N7 C8 C9 111.586 C8 C9 H10 128.192
C9 C5 H11 133.994
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.570      
2 H 0.184      
3 H 0.197      
4 H 0.184      
5 C 0.120      
6 O -0.286      
7 N -0.213      
8 C 0.309      
9 C -0.258      
10 H 0.154      
11 H 0.178      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.504 2.791 -0.000 2.836
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.184 1.866 -0.000
y 1.866 -35.768 0.000
z -0.000 0.000 -35.691
Traceless
 xyz
x 6.545 1.866 -0.000
y 1.866 -3.330 0.000
z -0.000 0.000 -3.215
Polar
3z2-r2-6.430
x2-y26.583
xy1.866
xz-0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.483 0.183 -0.000
y 0.183 7.380 0.000
z -0.000 0.000 3.938


<r2> (average value of r2) Å2
<r2> 138.013
(<r2>)1/2 11.748