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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-208.730238
Energy at 298.15K-208.736051
HF Energy-208.001569
Nuclear repulsion energy121.710877
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 MP2/6-31G(2df,p)
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 3801 3590 47.63      
2 A 3656 3453 47.82      
3 A 3247 3066 2.24      
4 A 3202 3024 4.88      
5 A 3114 2942 3.22      
6 A 1825 1724 254.58      
7 A 1631 1540 96.53      
8 A 1512 1428 7.68      
9 A 1501 1418 9.96      
10 A 1422 1343 93.57      
11 A 1355 1280 73.10      
12 A 1136 1073 0.26      
13 A 1064 1005 3.98      
14 A 987 932 7.24      
15 A 861 814 1.94      
16 A 645 610 11.87      
17 A 553 523 17.97      
18 A 521 492 6.96      
19 A 415 392 3.89      
20 A 263 249 219.20      
21 A 55 52 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 16382.9 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 15473.6 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 MP2/6-31G(2df,p)
ABC
0.35836 0.31250 0.17248

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.369 -0.280 -0.000
C2 0.084 0.158 0.001
N3 0.972 -0.883 -0.032
O4 0.432 1.322 0.004
H5 -1.996 0.605 -0.058
H6 -1.579 -0.934 -0.849
H7 -1.605 -0.832 0.913
H8 1.948 -0.664 0.070
H9 0.681 -1.834 0.105

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51762.41802.41081.08651.09181.09193.34042.5746
C21.51761.36891.21512.12812.16302.15872.03872.0817
N32.41801.36892.27053.32052.67892.74471.00561.0033
O42.41081.21512.27052.53233.14003.10032.49933.1670
H51.08652.12813.32052.53231.78021.77794.14543.6252
H61.09182.16302.67893.14001.78021.76473.65462.6127
H71.09192.15872.74473.10031.77791.76473.65522.6231
H83.34042.03871.00562.49934.14543.65463.65521.7248
H92.57462.08171.00333.16703.62522.61272.62311.7248

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 113.694 C1 C2 O4 123.435
C2 C1 H5 108.478 C2 C1 H6 110.920
C2 C1 H7 110.569 C2 N3 H8 117.500
C2 N3 H9 121.932 N3 C2 O4 122.855
H5 C1 H6 109.625 H5 C1 H7 109.403
H6 C1 H7 107.832 H8 N3 H9 118.306
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability