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: MP2/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at MP2/TZVP
 hartrees
Energy at 0K-208.717304
Energy at 298.15K-208.723279
HF Energy-208.052328
Nuclear repulsion energy121.602860
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 MP2/TZVP
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 3764 3568 38.20      
2 A 3622 3434 38.77      
3 A 3215 3047 6.66      
4 A 3192 3026 11.02      
5 A 3103 2941 6.67      
6 A 1786 1693 307.17      
7 A 1639 1554 86.67      
8 A 1513 1434 10.26      
9 A 1494 1417 9.39      
10 A 1427 1353 61.12      
11 A 1359 1288 124.09      
12 A 1142 1083 0.35      
13 A 1069 1014 4.19      
14 A 1003 951 13.86      
15 A 863 818 3.37      
16 A 643 610 25.96      
17 A 555 526 11.75      
18 A 513 486 38.17      
19 A 441 418 19.30      
20 A 394 373 202.95      
21 A 45 43 0.64      

Unscaled Zero Point Vibrational Energy (zpe) 16391.0 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 15537.1 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 MP2/TZVP
ABC
0.35955 0.31045 0.17223

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.355 -0.332 0.001
C2 0.077 0.153 -0.021
N3 1.012 -0.846 0.023
O4 0.370 1.338 -0.000
H5 -1.969 0.387 -0.532
H6 -1.468 -1.318 -0.446
H7 -1.697 -0.378 1.036
H8 1.981 -0.580 -0.007
H9 0.772 -1.814 -0.093

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51172.42222.40061.08621.08901.09053.34512.5942
C21.51171.36961.22032.12212.17582.13212.04052.0880
N32.42221.36962.27643.27402.56812.93011.00561.0038
O42.40061.22032.27642.58043.26082.87962.50423.1786
H51.08622.12213.27402.58041.77991.76574.10093.5435
H61.08902.17582.56813.26081.77991.76963.55492.3218
H71.09052.13212.93012.87961.76571.76963.82893.0715
H83.34512.04051.00562.50424.10093.55493.82891.7300
H92.59422.08801.00383.17863.54352.32183.07151.7300

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.327 C1 C2 O4 122.610
C2 C1 H5 108.430 C2 C1 H6 112.553
C2 C1 H7 108.961 C2 N3 H8 117.615
C2 N3 H9 122.469 N3 C2 O4 122.934
H5 C1 H6 109.825 H5 C1 H7 108.423
H6 C1 H7 108.566 H8 N3 H9 118.850
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability