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: PBEPBE/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 PBEPBE/6-31G*
 hartrees
Energy at 0K-285.023127
Energy at 298.15K-285.029419
Nuclear repulsion energy221.713165
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 PBEPBE/6-31G*
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 3227 3181 0.91      
2 A 3205 3159 0.47      
3 A 3094 3050 5.30      
4 A 3056 3013 11.00      
5 A 2994 2951 15.03      
6 A 1575 1553 22.25      
7 A 1475 1454 10.40      
8 A 1464 1443 8.34      
9 A 1452 1432 14.09      
10 A 1417 1396 28.66      
11 A 1382 1363 0.62      
12 A 1263 1245 1.03      
13 A 1124 1108 14.57      
14 A 1058 1043 9.99      
15 A 1038 1023 3.67      
16 A 1008 993 1.91      
17 A 958 945 1.22      
18 A 913 900 1.21      
19 A 865 853 22.83      
20 A 811 799 0.07      
21 A 754 743 39.39      
22 A 647 638 4.56      
23 A 641 632 0.34      
24 A 597 588 3.32      
25 A 325 321 6.21      
26 A 263 260 4.84      
27 A 127 125 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 18366.9 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 18104.3 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 PBEPBE/6-31G*
ABC
0.30118 0.11620 0.08520

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/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 -1.013 -0.000
H4 -2.538 0.540 0.890
C5 1.492 0.580 -0.000
O6 1.389 -0.770 -0.000
N7 0.025 -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
C11.10371.10061.10373.67213.61502.44581.49882.64283.05934.7415
H21.10371.78941.78004.12704.23393.17952.15742.99133.16705.1416
H31.10061.78941.78944.30573.90492.53532.14143.50834.08545.3949
H41.10371.78001.78944.12704.23393.17932.15742.99133.16705.1416
C53.67214.12704.30574.12701.35392.24492.20031.36672.21131.0893
O63.61504.23393.90494.23391.35391.40822.18092.23473.28972.0717
N72.44583.17952.53533.17932.24491.40821.32872.28383.33123.2472
C81.49882.15742.14142.15742.20032.18091.32871.43202.27193.2846
C92.64282.99133.50832.99131.36672.23472.28381.43201.08812.2634
H103.05933.16704.08543.16702.21133.28973.33122.27191.08812.7967
H114.74155.14165.39495.14161.08932.07173.24723.28462.26342.7967

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 119.653 C1 C8 C9 128.766
H2 C1 H3 108.547 H2 C1 H4 107.488
H2 C1 C8 111.086 H3 C1 H4 108.547
H3 C1 C8 109.993 H4 C1 C8 111.085
C5 O6 N7 108.711 C5 C9 C8 103.637
C5 C9 H10 128.169 O6 C5 C9 110.450
O6 C5 H11 115.552 O6 N7 C8 105.621
N7 C8 C9 111.582 C8 C9 H10 128.195
C9 C5 H11 133.998
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/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 -0.257      
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 -29.186 1.866 -0.000
y 1.866 -35.767 0.000
z -0.000 0.000 -35.691
Traceless
 xyz
x 6.544 1.866 -0.000
y 1.866 -3.329 0.000
z -0.000 0.000 -3.215
Polar
3z2-r2-6.429
x2-y26.582
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> 138.011
(<r2>)1/2 11.748