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All results from a given calculation for CH3ONO (Methyl nitrite)

using model chemistry: MP2/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS cis 1A'
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-48.484529
Energy at 298.15K-48.489006
HF Energy-48.042068
Nuclear repulsion energy65.683918
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/CEP-31G
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' 3225 3116 20.24      
2 A' 3056 2953 28.20      
3 A' 1516 1465 7.98      
4 A' 1464 1415 2.52      
5 A' 1315 1270 68.83      
6 A' 1162 1123 7.06      
7 A' 951 919 196.48      
8 A' 784 757 110.40      
9 A' 643 621 123.88      
10 A' 306 295 1.86      
11 A" 3173 3066 49.81      
12 A" 1500 1449 9.44      
13 A" 1138 1100 0.99      
14 A" 325 314 5.43      
15 A" 191 184 0.44      

Unscaled Zero Point Vibrational Energy (zpe) 10373.7 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 10024.1 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/CEP-31G
ABC
0.60713 0.22211 0.16800

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.398 0.360 0.000
O2 0.000 0.932 0.000
H3 2.028 1.264 0.000
H4 1.560 -0.254 0.908
H5 1.560 -0.254 -0.908
N6 -1.112 -0.038 0.000
O7 -0.719 -1.263 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 H4 H5 N6 O7
C11.51061.10201.10741.10742.54102.6671
O21.51062.05452.15922.15921.47552.3093
H31.10202.05451.82941.82943.39863.7320
H41.10742.15921.82941.81572.82952.6523
H51.10742.15921.82941.81572.82952.6523
N62.54101.47553.39862.82952.82951.2857
O72.66712.30933.73202.65232.65231.2857

picture of Methyl nitrite state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 N6 116.622 O2 C1 H3 102.572
O2 C1 H4 110.174 O2 C1 H5 110.174
O2 N6 O7 113.338 H3 C1 H4 111.787
H3 C1 H5 111.787 H4 C1 H5 110.126
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability