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All results from a given calculation for C4H5NO (3-Methylisoxazole)

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-285.249782
Energy at 298.15K-285.256237
Nuclear repulsion energy223.560696
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 B3PW91/6-31G*
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 3309 3166 0.75      
2 A 3288 3145 0.22      
3 A 3171 3033 5.70      
4 A 3133 2997 11.88      
5 A 3068 2935 15.02      
6 A 1641 1570 25.51      
7 A 1522 1456 9.27      
8 A 1507 1442 8.68      
9 A 1505 1440 9.79      
10 A 1468 1404 43.19      
11 A 1428 1366 0.98      
12 A 1309 1252 1.71      
13 A 1176 1125 15.91      
14 A 1098 1050 9.11      
15 A 1073 1027 3.74      
16 A 1044 999 2.24      
17 A 988 945 2.53      
18 A 965 923 12.01      
19 A 917 877 18.59      
20 A 869 831 0.38      
21 A 789 755 42.01      
22 A 667 638 4.55      
23 A 667 638 0.69      
24 A 617 590 4.46      
25 A 336 321 6.64      
26 A 274 262 5.02      
27 A 129 123 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 18977.4 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 18155.6 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 B3PW91/6-31G*
ABC
0.30657 0.11781 0.08648

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.127 0.024 0.000
H2 2.521 0.538 0.884
H3 2.497 -1.004 0.000
H4 2.521 0.538 -0.884
C5 -1.483 0.571 0.000
O6 -1.372 -0.765 0.000
N7 -0.029 -1.106 -0.000
C8 0.634 0.029 0.000
C9 -0.254 1.146 -0.000
H10 -0.007 2.198 -0.000
H11 -2.492 0.960 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 C9 H10 H11
C11.09581.09271.09573.65123.58732.43391.49342.63263.04654.7127
H21.09581.77721.76854.10054.19963.15982.14532.97583.15155.1076
H31.09271.77721.77724.28053.87712.52792.13093.49224.06515.3618
H41.09571.76851.77724.10064.19953.15962.14532.97573.15135.1077
C53.65124.10054.28054.10061.34022.22002.18481.35662.19641.0813
O63.58734.19963.87714.19951.34021.38662.15752.21403.26192.0562
N72.43393.15982.52793.15962.22001.38661.31442.26383.30413.2152
C81.49342.14532.13092.14532.18482.15751.31441.42702.26143.2611
C92.63262.97583.49222.97571.35662.21402.26381.42701.08022.2452
H103.04653.15154.06513.15132.19643.26193.30412.26141.08022.7757
H114.71275.10765.36185.10771.08132.05623.21523.26112.24522.7757

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 120.055 C1 C8 C9 128.679
H2 C1 H3 108.603 H2 C1 H4 107.603
H2 C1 C8 110.972 H3 C1 H4 108.602
H3 C1 C8 110.004 H4 C1 C8 110.971
C5 O6 N7 108.988 C5 C9 C8 103.390
C5 C9 H10 128.312 O6 C5 C9 110.362
O6 C5 H11 115.824 O6 N7 C8 105.994
N7 C8 C9 111.266 C8 C9 H10 128.298
C9 C5 H11 133.814
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.588     -0.594
2 H 0.194     0.159
3 H 0.210     0.168
4 H 0.194     0.159
5 C 0.131     0.186
6 O -0.320     -0.094
7 N -0.214     -0.416
8 C 0.312     0.656
9 C -0.301     -0.561
10 H 0.182     0.224
11 H 0.202     0.112


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.503 2.929 0.000 2.971
CHELPG        
AIM        
ESP 0.473 2.897 0.001 2.935


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.970 -2.004 -0.000
y -2.004 -35.715 -0.001
z -0.000 -0.001 -35.602
Traceless
 xyz
x 6.688 -2.004 -0.000
y -2.004 -3.429 -0.001
z -0.000 -0.001 -3.259
Polar
3z2-r2-6.519
x2-y26.744
xy-2.004
xz-0.000
yz-0.001


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> 136.242
(<r2>)1/2 11.672