return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for CH3CHN (methylmethaniminyl radical)

using model chemistry: MP2=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at MP2=FULL/6-31+G**
 hartrees
Energy at 0K-132.898961
Energy at 298.15K-132.902911
HF Energy-132.484542
Nuclear repulsion energy64.612344
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=FULL/6-31+G**
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' 3266 3068 4.59      
2 A' 3140 2949 6.06      
3 A' 3109 2920 15.37      
4 A' 2117 1988 99.45      
5 A' 1528 1435 14.22      
6 A' 1439 1351 5.07      
7 A' 1300 1221 3.65      
8 A' 1102 1035 11.38      
9 A' 952 894 1.25      
10 A' 449 422 22.94      
11 A" 3236 3040 5.37      
12 A" 1527 1434 11.49      
13 A" 1163 1092 2.98      
14 A" 808 759 7.97      
15 A" 199 187 2.79      

Unscaled Zero Point Vibrational Energy (zpe) 12667.2 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 11897.1 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=FULL/6-31+G**
ABC
1.93091 0.35301 0.31596

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.480 0.000
C2 -0.824 -0.779 0.000
N3 1.228 0.514 0.000
H4 -0.544 1.432 0.000
H5 -0.180 -1.652 0.000
H6 -1.462 -0.794 0.881
H7 -1.462 -0.794 -0.881

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6 H7
C11.50551.22801.09572.14032.13022.1302
C21.50552.42562.22881.08501.08791.0879
N31.22802.42561.99472.58373.11783.1178
H41.09572.22881.99473.10542.56382.5638
H52.14031.08502.58373.10541.77681.7768
H62.13021.08793.11782.56381.77681.7628
H72.13021.08793.11782.56381.77681.7628

picture of methylmethaniminyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.370 C1 C2 H6 109.394
C1 C2 H7 109.394 C2 C1 N3 124.784
C2 C1 H4 117.051 N3 C1 H4 118.165
H5 C2 H6 109.707 H5 C2 H7 109.707
H6 C2 H7 108.233
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability