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: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-285.292818
Energy at 298.15K-285.299324
Nuclear repulsion energy224.103068
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 mPW1PW91/6-31G**
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 3326 3164 0.31      
2 A 3302 3142 0.05      
3 A 3190 3035 4.53      
4 A 3154 3001 10.30      
5 A 3082 2933 14.09      
6 A 1656 1576 26.98      
7 A 1529 1455 3.54      
8 A 1510 1437 22.56      
9 A 1497 1425 8.57      
10 A 1472 1401 38.47      
11 A 1421 1352 0.82      
12 A 1315 1252 1.72      
13 A 1188 1130 15.58      
14 A 1102 1049 8.96      
15 A 1069 1017 3.72      
16 A 1048 997 2.68      
17 A 991 943 8.46      
18 A 981 934 10.28      
19 A 927 882 15.78      
20 A 886 843 0.47      
21 A 797 759 41.48      
22 A 672 640 4.92      
23 A 672 639 0.26      
24 A 622 592 4.53      
25 A 338 322 6.79      
26 A 277 263 5.12      
27 A 131 124 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 19077.4 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 18152.1 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 mPW1PW91/6-31G**
ABC
0.30790 0.11838 0.08689

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.123 0.024 0.000
H2 2.514 0.536 0.883
H3 2.490 -1.002 -0.001
H4 2.514 0.538 -0.882
C5 -1.480 0.568 0.000
O6 -1.367 -0.764 0.000
N7 -0.029 -1.103 -0.000
C8 0.632 0.029 -0.000
C9 -0.255 1.145 -0.000
H10 -0.010 2.195 -0.000
H11 -2.487 0.958 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 C9 H10 H11
C11.09291.09001.09293.64403.57792.42921.49042.62843.04274.7031
H21.09291.77371.76474.09134.18743.15172.13962.96983.14715.0960
H31.09001.77371.77384.27003.86512.52172.12503.48494.05815.3492
H41.09291.76471.77384.09104.18803.15262.13962.96893.14545.0956
C53.64404.09134.27004.09101.33692.21332.18041.35432.19231.0792
O63.57794.18743.86514.18801.33691.38032.15122.20913.25472.0537
N72.42923.15172.52173.15262.21331.38031.31122.25893.29723.2072
C81.49042.13962.12502.13962.18042.15121.31121.42532.25833.2544
C92.62842.96983.48492.96891.35432.20912.25891.42531.07782.2397
H103.04273.14714.05813.14542.19233.25473.29722.25831.07782.7682
H114.70315.09605.34925.09561.07922.05373.20723.25442.23972.7682

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 120.106 C1 C8 C9 128.693
H2 C1 H3 108.691 H2 C1 H4 107.672
H2 C1 C8 110.899 H3 C1 H4 108.694
H3 C1 C8 109.911 H4 C1 C8 110.899
C5 O6 N7 109.071 C5 C9 C8 103.306
C5 C9 H10 128.325 O6 C5 C9 110.338
O6 C5 H11 116.020 O6 N7 C8 106.084
N7 C8 C9 111.201 C8 C9 H10 128.369
C9 C5 H11 133.642
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.449      
2 H 0.157      
3 H 0.171      
4 H 0.157      
5 C 0.184      
6 O -0.333      
7 N -0.212      
8 C 0.275      
9 C -0.258      
10 H 0.143      
11 H 0.164      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.509 2.935 0.000 2.979
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.892 -2.009 0.000
y -2.009 -35.716 -0.000
z 0.000 -0.000 -35.593
Traceless
 xyz
x 6.762 -2.009 0.000
y -2.009 -3.473 -0.000
z 0.000 -0.000 -3.289
Polar
3z2-r2-6.577
x2-y26.824
xy-2.009
xz0.000
yz-0.000


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


<r2> (average value of r2) Å2
<r2> 135.688
(<r2>)1/2 11.649