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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: MP2/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 MP2/cc-pVDZ
 hartrees
Energy at 0K-208.620037
Energy at 298.15K-208.626032
HF Energy-207.994453
Nuclear repulsion energy120.943795
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/cc-pVDZ
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 3746 3568 32.72      
2 A 3603 3432 30.33      
3 A 3233 3079 3.94      
4 A 3186 3035 8.57      
5 A 3093 2947 6.18      
6 A 1826 1739 244.23      
7 A 1621 1544 90.10      
8 A 1484 1414 8.18      
9 A 1472 1402 8.88      
10 A 1413 1346 114.87      
11 A 1339 1276 52.75      
12 A 1142 1088 0.75      
13 A 1050 1000 3.93      
14 A 979 932 7.18      
15 A 867 826 3.15      
16 A 634 604 28.20      
17 A 559 532 20.79      
18 A 511 487 31.06      
19 A 423 403 34.95      
20 A 384 366 172.71      
21 A 77 74 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 16320.5 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 15545.3 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/cc-pVDZ
ABC
0.35380 0.30888 0.17072

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.377 -0.279 -0.001
C2 0.081 0.156 -0.002
N3 0.981 -0.893 -0.069
O4 0.438 1.326 0.011
H5 -2.014 0.607 -0.123
H6 -1.573 -0.996 -0.814
H7 -1.625 -0.770 0.956
H8 1.942 -0.646 0.149
H9 0.680 -1.809 0.245

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52122.43742.42221.09771.10191.10343.34232.5757
C21.52121.38341.22332.14612.17272.16452.03162.0688
N32.43741.38342.28573.34952.66222.80251.01611.0138
O42.42221.22332.28572.55793.18013.08892.48343.1529
H51.09772.14613.34952.55791.80051.79204.15793.6372
H61.10192.17272.66223.18011.80051.78423.66112.6189
H71.10342.16452.80253.08891.79201.78423.65912.6263
H83.34232.03161.01612.48344.15793.66113.65911.7190
H92.57572.06881.01383.15293.63722.61892.62631.7190

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.014 C1 C2 O4 123.535
C2 C1 H5 108.988 C2 C1 H6 110.837
C2 C1 H7 110.094 C2 N3 H8 114.841
C2 N3 H9 118.503 N3 C2 O4 122.412
H5 C1 H6 109.885 H5 C1 H7 109.004
H6 C1 H7 108.008 H8 N3 H9 115.747
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability