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 CH3CONH2 (Acetamide)

using model chemistry: BLYP/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 BLYP/6-31+G**
 hartrees
Energy at 0K-209.167093
Energy at 298.15K-209.172694
Nuclear repulsion energy120.115091
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/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 3627 3608 28.35      
2 A 3486 3468 20.43      
3 A 3056 3040 5.36      
4 A 3054 3038 21.63      
5 A 2980 2964 13.04      
6 A 1688 1679 372.36      
7 A 1577 1569 80.90      
8 A 1457 1449 7.89      
9 A 1441 1434 8.08      
10 A 1363 1356 34.28      
11 A 1292 1285 154.37      
12 A 1081 1075 0.43      
13 A 1023 1017 2.33      
14 A 952 947 12.79      
15 A 808 803 2.48      
16 A 647 643 7.59      
17 A 523 521 10.62      
18 A 507 504 8.31      
19 A 419 417 4.43      
20 A 185 184 207.77      
21 A 45 44 3.00      

Unscaled Zero Point Vibrational Energy (zpe) 15604.9 cm-1
Scaled (by 0.9947) Zero Point Vibrational Energy (zpe) 15522.2 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/6-31+G**
ABC
0.35310 0.30118 0.16767

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.378 -0.346 -0.000
C2 0.074 0.145 -0.000
N3 1.044 -0.839 -0.000
O4 0.365 1.348 0.000
H5 -1.887 0.062 -0.887
H6 -1.479 -1.442 -0.001
H7 -1.887 0.061 0.888
H8 2.021 -0.554 0.000
H9 0.824 -1.831 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.53262.47212.43091.10071.10101.10073.40602.6560
C21.53261.38191.23842.15372.22042.15372.06922.1130
N32.47211.38192.29073.19232.59453.19181.01791.0155
O42.43091.23842.29072.74103.34502.74152.52273.2120
H51.10072.15373.19232.74101.79271.77434.05493.4232
H61.10102.22042.59453.34501.79271.79273.61152.3359
H71.10072.15373.19182.74151.77431.79274.05453.4224
H83.40602.06921.01792.52274.05493.61154.05451.7500
H92.65602.11301.01553.21203.42322.33593.42241.7500

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.935 C1 C2 O4 122.267
C2 C1 H5 108.626 C2 C1 H6 113.936
C2 C1 H7 108.626 C2 N3 H8 118.350
C2 N3 H9 122.881 N3 C2 O4 121.799
H5 C1 H6 109.023 H5 C1 H7 107.410
H6 C1 H7 109.021 H8 N3 H9 118.770
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.455      
2 C 0.371      
3 N -0.511      
4 O -0.489      
5 H 0.183      
6 H 0.129      
7 H 0.183      
8 H 0.303      
9 H 0.285      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.176 -3.951 0.000 3.955
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.988 -2.457 0.000
y -2.457 -27.040 -0.000
z 0.000 -0.000 -25.788
Traceless
 xyz
x 5.425 -2.457 0.000
y -2.457 -3.651 -0.000
z 0.000 -0.000 -1.774
Polar
3z2-r2-3.548
x2-y26.051
xy-2.457
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> 77.209
(<r2>)1/2 8.787