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 NH2CH2NH2 (diaminomethane)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2=FULL/6-31G**
 hartrees
Energy at 0K-150.764025
Energy at 298.15K-150.772141
HF Energy-150.253946
Counterpoise corrected energy-150.764025
CP Energy at 298.15K-150.772141
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.349891
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/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3571 3337 0.76      
2 A1 3157 2950 38.65      
3 A1 1709 1597 43.48      
4 A1 1549 1447 0.00      
5 A1 1147 1072 36.56      
6 A1 901 842 0.29      
7 A1 467 436 6.91      
8 A2 3680 3438 0.00      
9 A2 1438 1344 0.00      
10 A2 1096 1024 0.00      
11 A2 294 275 0.00      
12 B1 3677 3436 0.04      
13 B1 3221 3010 27.30      
14 B1 1409 1317 0.34      
15 B1 869 812 0.99      
16 B1 426 398 107.00      
17 B2 3572 3338 0.04      
18 B2 1700 1588 2.19      
19 B2 1432 1338 23.95      
20 B2 1130 1056 62.11      
21 B2 835 780 436.31      

Unscaled Zero Point Vibrational Energy (zpe) 18640.2 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 17417.4 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/6-31G**
ABC
1.18682 0.30425 0.27548

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.553
N2 0.000 1.258 -0.183
N3 0.000 -1.258 -0.183
H4 0.877 0.000 1.198
H5 -0.877 0.000 1.198
H6 0.812 1.303 -0.788
H7 -0.812 1.303 -0.788
H8 -0.812 -1.303 -0.788
H9 0.812 -1.303 -0.788

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45811.45811.08841.08842.03872.03872.03872.0387
N21.45812.51692.06402.06401.01361.01362.75442.7544
N31.45812.51692.06402.06402.75442.75441.01361.0136
H41.08842.06402.06401.75392.37622.91462.91462.3762
H51.08842.06402.06401.75392.91462.37622.37622.9146
H62.03871.01362.75442.37622.91461.62413.07072.6061
H72.03871.01362.75442.91462.37621.62412.60613.0707
H82.03872.75441.01362.91462.37623.07072.60611.6241
H92.03872.75441.01362.37622.91462.60613.07071.6241

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.840 C1 N2 H7 109.840
C1 N3 H8 109.840 C1 N3 H9 109.840
N2 C1 N3 119.336 N2 C1 H4 107.405
N2 C1 H5 107.405 N3 C1 H4 107.405
N3 C1 H5 107.405 H4 C1 H5 107.359
H6 N2 H7 106.478 H8 N3 H9 106.478
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability