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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: PBEPBE/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-208.977727
Energy at 298.15K-208.983415
Nuclear repulsion energy120.531158
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/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3613 3592 22.05      
2 A 3471 3451 14.21      
3 A 3109 3091 4.41      
4 A 3056 3038 10.52      
5 A 2979 2961 7.23      
6 A 1756 1746 264.31      
7 A 1536 1527 95.10      
8 A 1408 1400 8.95      
9 A 1393 1384 10.06      
10 A 1337 1329 112.52      
11 A 1282 1274 29.52      
12 A 1082 1076 0.35      
13 A 995 989 3.66      
14 A 932 926 4.52      
15 A 826 821 3.83      
16 A 631 627 8.90      
17 A 536 533 15.36      
18 A 497 494 7.49      
19 A 404 401 3.70      
20 A 253 251 178.38      
21 A 49 48 0.43      

Unscaled Zero Point Vibrational Energy (zpe) 15570.8 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 15480.5 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/cc-pVDZ
ABC
0.35321 0.30599 0.16946

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.380 -0.291 -0.001
C2 0.080 0.152 -0.007
N3 0.994 -0.880 -0.044
O4 0.426 1.332 0.007
H5 -2.009 0.560 -0.314
H6 -1.561 -1.156 -0.670
H7 -1.680 -0.586 1.026
H8 1.972 -0.633 0.112
H9 0.714 -1.842 0.145

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52542.44592.42801.10401.10851.11023.37152.6096
C21.52541.37931.22962.15032.20102.17002.05242.0982
N32.44591.37932.28433.34132.64492.89521.02161.0197
O42.42801.22962.28432.57433.25543.02542.50243.1902
H51.10402.15033.34132.57431.80951.79394.17813.6601
H61.10852.20102.64493.25541.80951.79383.65682.5119
H71.11022.17002.89523.02541.79391.79383.76562.8437
H83.37152.05241.02162.50244.17813.65683.76561.7460
H92.60962.09821.01973.19023.66012.51192.84371.7460

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.624 C1 C2 O4 123.247
C2 C1 H5 108.666 C2 C1 H6 112.401
C2 C1 H7 109.837 C2 N3 H8 116.704
C2 N3 H9 121.277 N3 C2 O4 122.124
H5 C1 H6 109.740 H5 C1 H7 108.222
H6 C1 H7 107.891 H8 N3 H9 117.602
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.055      
2 C 0.017      
3 N -0.077      
4 O -0.232      
5 H 0.056      
6 H 0.042      
7 H 0.061      
8 H 0.099      
9 H 0.090      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.111 -3.518 0.514 3.557
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.822 -2.305 0.572
y -2.305 -25.066 -0.750
z 0.572 -0.750 -24.563
Traceless
 xyz
x 3.993 -2.305 0.572
y -2.305 -2.374 -0.750
z 0.572 -0.750 -1.619
Polar
3z2-r2-3.238
x2-y24.244
xy-2.305
xz0.572
yz-0.750


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.638 -0.146 0.037
y -0.146 5.688 -0.024
z 0.037 -0.024 3.228


<r2> (average value of r2) Å2
<r2> 75.888
(<r2>)1/2 8.711