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: PBEPBE/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-286.274954
Energy at 298.15K-286.283620
Nuclear repulsion energy239.251829
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/6-31+G**
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 3117 3082 3.40      
2 A 2999 2965 54.95      
3 A 2997 2963 7.47      
4 A 2982 2948 41.38      
5 A 1686 1667 141.00      
6 A 1478 1461 2.76      
7 A 1453 1436 0.51      
8 A 1432 1416 12.07      
9 A 1370 1354 44.57      
10 A 1328 1313 14.54      
11 A 1290 1276 8.98      
12 A 1210 1196 97.92      
13 A 1049 1037 4.11      
14 A 975 964 87.23      
15 A 953 942 0.29      
16 A 923 912 19.34      
17 A 881 871 25.55      
18 A 732 724 4.92      
19 A 648 640 1.63      
20 A 342 338 6.74      
21 A 3063 3028 5.70      
22 A 3051 3016 35.22      
23 A 3013 2979 6.49      
24 A 1431 1415 11.64      
25 A 1205 1191 0.18      
26 A 1173 1160 2.03      
27 A 1082 1070 0.02      
28 A 1022 1010 2.48      
29 A 807 798 0.03      
30 A 574 568 3.09      
31 A 230 227 12.20      
32 A 124 123 0.75      
33 A 26 26 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23321.4 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 23055.5 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/6-31+G**
ABC
0.25425 0.11303 0.08190

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.333 2.139 0.000
C2 0.548 -1.513 0.000
C3 -0.991 -1.295 0.000
N4 -1.178 0.168 0.000
O5 1.092 -0.159 0.000
C6 0.000 0.684 0.000
H7 0.926 -2.028 0.898
H8 0.926 -2.028 -0.898
H9 -1.481 -1.731 0.889
H10 -1.481 -1.731 -0.889
H11 0.934 2.396 0.888
H12 0.934 2.396 -0.888
H13 -0.593 2.727 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 C6 H7 H8 H9 H10 H11 H12 H13
C13.65853.68132.48422.42021.49274.30394.30394.36584.36581.10251.10251.0976
C23.65851.55482.40861.45942.26451.10221.10222.22572.22574.02694.02694.3911
C33.68131.55481.47462.37372.21412.24052.24051.10411.10414.25684.25684.0424
N42.48422.40861.47462.29341.28613.17043.17042.11802.11803.19583.19582.6257
O52.42021.45942.37372.29341.38002.08042.08043.14383.14382.70932.70933.3425
C61.49272.26452.21411.28611.38003.00343.00342.96932.96932.14252.14252.1275
H74.30391.10222.24053.17042.08043.00341.79652.42513.01234.42374.77085.0722
H84.30391.10222.24053.17042.08043.00341.79653.01232.42514.77084.42375.0722
H94.36582.22571.10412.11803.14382.96932.42513.01231.77744.78135.10094.6319
H104.36582.22571.10412.11803.14382.96933.01232.42511.77745.10094.78134.6319
H111.10254.02694.25683.19582.70932.14254.42374.77084.78135.10091.77671.7976
H121.10254.02694.25683.19582.70932.14254.77084.42375.10094.78131.77671.7976
H131.09764.39114.04242.62573.34252.12755.07225.07224.63194.63191.79761.7976

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 126.601 C1 C6 O5 114.756
C2 C3 N4 105.294 C2 C3 H9 112.561
C2 C3 H10 112.561 C2 O5 C6 105.755
C3 C2 O5 103.863 C3 C2 H7 113.886
C3 C2 H8 113.886 C3 N4 C6 106.444
N4 C3 H9 109.601 N4 C3 H10 109.601
N4 C6 O5 118.643 O5 C2 H7 107.793
O5 C2 H8 107.793 C6 C1 H11 110.390
C6 C1 H12 110.390 C6 C1 H13 109.492
H7 C2 H8 109.158 H9 C3 H10 107.201
H11 C1 H12 107.365 H11 C1 H13 109.587
H12 C1 H13 109.587
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.840      
2 C -0.113      
3 C -0.258      
4 N -0.240      
5 O -0.263      
6 C 0.444      
7 H 0.167      
8 H 0.167      
9 H 0.172      
10 H 0.172      
11 H 0.194      
12 H 0.194      
13 H 0.203      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.989 -0.947 0.000 1.369
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.018 1.973 0.000
y 1.973 -29.974 0.000
z 0.000 0.000 -35.852
Traceless
 xyz
x -9.105 1.973 0.000
y 1.973 8.962 0.000
z 0.000 0.000 0.144
Polar
3z2-r20.287
x2-y2-12.044
xy1.973
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.985 0.571 0.000
y 0.571 10.250 0.000
z 0.000 0.000 6.638


<r2> (average value of r2) Å2
<r2> 150.646
(<r2>)1/2 12.274