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 C4H7NO (Oxazole, 4,5-dihydro-2-methyl-)

using model chemistry: BLYP/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at BLYP/cc-pVTZ
 hartrees
Energy at 0K-286.601842
Energy at 298.15K-286.610607
Nuclear repulsion energy238.854836
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 BLYP/cc-pVTZ
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 3075 3066 6.31      
2 A 2979 2970 56.54      
3 A 2973 2964 11.94      
4 A 2963 2954 45.40      
5 A 1656 1651 121.87      
6 A 1488 1483 1.19      
7 A 1468 1464 0.26      
8 A 1445 1440 12.22      
9 A 1377 1373 16.77      
10 A 1329 1325 14.45      
11 A 1290 1286 8.59      
12 A 1192 1189 98.17      
13 A 1037 1034 1.02      
14 A 926 923 7.82      
15 A 920 917 68.61      
16 A 902 899 37.01      
17 A 859 857 25.12      
18 A 726 724 5.81      
19 A 637 635 1.19      
20 A 341 340 5.77      
21 A 3020 3011 43.49      
22 A 3016 3006 10.27      
23 A 2982 2973 7.78      
24 A 1443 1439 7.43      
25 A 1214 1210 0.17      
26 A 1174 1170 1.85      
27 A 1088 1085 0.02      
28 A 1037 1034 2.05      
29 A 810 807 0.18      
30 A 581 579 3.53      
31 A 229 229 9.81      
32 A 128 128 0.72      
33 A 76 75 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 23189.3 cm-1
Scaled (by 0.997) Zero Point Vibrational Energy (zpe) 23119.8 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 BLYP/cc-pVTZ
ABC
0.25429 0.11228 0.08147

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.341 2.144 0.000
C2 0.541 -1.524 0.000
C3 -1.000 -1.298 0.000
N4 -1.173 0.177 0.000
O5 1.095 -0.162 0.000
C6 0.000 0.687 0.000
H7 0.913 -2.038 0.894
H8 0.913 -2.038 -0.894
H9 -1.489 -1.726 0.885
H10 -1.489 -1.726 -0.885
H11 0.941 2.396 0.884
H12 0.941 2.396 -0.884
H13 -0.576 2.736 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 C6 H7 H8 H9 H10 H11 H12 H13
C13.67393.69442.48242.42681.49664.31454.31454.37154.37151.09731.09731.0919
C23.67391.55802.41451.47042.27651.09561.09562.22352.22354.03794.03794.4047
C33.69441.55801.48482.38372.22292.23732.23731.09751.09754.26524.26524.0566
N42.48242.41451.48482.29321.27893.17033.17032.12202.12203.18933.18932.6282
O52.42681.47042.38372.29321.38612.08552.08553.14743.14742.71042.71043.3462
C61.49662.27652.22291.27891.38613.00943.00942.97022.97022.14132.14132.1288
H74.31451.09562.23733.17032.08553.00941.78702.42173.00454.43334.77625.0802
H84.31451.09562.23733.17032.08553.00941.78703.00452.42174.77624.43335.0802
H94.37152.22351.09752.12203.14742.97022.42173.00451.76944.78455.10084.6398
H104.37152.22351.09752.12203.14742.97023.00452.42171.76945.10084.78454.6398
H111.09734.03794.26523.18932.71042.14134.43334.77624.78455.10081.76721.7889
H121.09734.03794.26523.18932.71042.14134.77624.43335.10084.78451.76721.7889
H131.09194.40474.05662.62823.34622.12885.08025.08024.63984.63981.78891.7889

picture of Oxazole, 4,5-dihydro-2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C6 N4 126.690 C1 C6 O5 114.619
C2 C3 N4 105.009 C2 C3 H9 112.565
C2 C3 H10 112.565 C2 O5 C6 105.645
C3 C2 O5 103.797 C3 C2 H7 113.809
C3 C2 H8 113.809 C3 N4 C6 106.858
N4 C3 H9 109.615 N4 C3 H10 109.615
N4 C6 O5 118.691 O5 C2 H7 107.839
O5 C2 H8 107.839 C6 C1 H11 110.334
C6 C1 H12 110.334 C6 C1 H13 109.669
H7 C2 H8 109.289 H9 C3 H10 107.439
H11 C1 H12 107.261 H11 C1 H13 109.604
H12 C1 H13 109.604
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.259      
2 C 0.008      
3 C -0.064      
4 N -0.217      
5 O -0.264      
6 C 0.177      
7 H 0.077      
8 H 0.077      
9 H 0.078      
10 H 0.078      
11 H 0.100      
12 H 0.100      
13 H 0.110      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.901 -0.854 0.000 1.242
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -41.512 1.804 0.000
y 1.804 -30.517 0.000
z 0.000 0.000 -35.724
Traceless
 xyz
x -8.392 1.804 0.000
y 1.804 8.100 0.000
z 0.000 0.000 0.291
Polar
3z2-r20.582
x2-y2-10.995
xy1.804
xz0.000
yz0.000


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> 151.168
(<r2>)1/2 12.295