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All results from a given calculation for NH2CH2NH2 (diaminomethane)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-151.025932
Energy at 298.15K-151.033876
HF Energy-151.025932
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.634543
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 PBEPBE/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 A1 3390 3355 3.99      
2 A1 2979 2949 38.34      
3 A1 1621 1604 28.55      
4 A1 1433 1418 0.14      
5 A1 1093 1082 22.25      
6 A1 841 832 0.05      
7 A1 439 434 5.13      
8 A2 3475 3440 0.00      
9 A2 1358 1344 0.00      
10 A2 1051 1040 0.00      
11 A2 262 260 0.00      
12 B1 3473 3438 0.68      
13 B1 3025 2994 22.90      
14 B1 1338 1324 0.70      
15 B1 827 818 0.10      
16 B1 395 391 79.97      
17 B2 3390 3355 0.07      
18 B2 1609 1593 0.69      
19 B2 1342 1328 18.46      
20 B2 1053 1042 41.45      
21 B2 791 783 401.17      

Unscaled Zero Point Vibrational Energy (zpe) 17592.5 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 17411.3 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 PBEPBE/6-31G(2df,p)
ABC
1.17294 0.29880 0.27078

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.552
N2 0.000 1.272 -0.181
N3 0.000 -1.272 -0.181
H4 0.887 0.000 1.210
H5 -0.887 0.000 1.210
H6 0.816 1.303 -0.801
H7 -0.816 1.303 -0.801
H8 -0.816 -1.303 -0.801
H9 0.816 -1.303 -0.801

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46811.46811.10401.10402.04842.04842.04842.0484
N21.46812.54372.08302.08301.02521.02522.77152.7715
N31.46812.54372.08302.08302.77152.77151.02521.0252
H41.10402.08302.08301.77342.39762.93972.93972.3976
H51.10402.08302.08301.77342.93972.39762.39762.9397
H62.04841.02522.77152.39762.93971.63163.07512.6065
H72.04841.02522.77152.93972.39761.63162.60653.0751
H82.04842.77151.02522.93972.39763.07512.60651.6316
H92.04842.77151.02522.39762.93972.60653.07511.6316

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.188 C1 N2 H7 109.188
C1 N3 H8 109.188 C1 N3 H9 109.188
N2 C1 N3 120.067 N2 C1 H4 107.313
N2 C1 H5 107.313 N3 C1 H4 107.313
N3 C1 H5 107.313 H4 C1 H5 106.862
H6 N2 H7 105.448 H8 N3 H9 105.448
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.145      
2 N -0.486      
3 N -0.486      
4 H 0.125      
5 H 0.125      
6 H 0.217      
7 H 0.217      
8 H 0.217      
9 H 0.217      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.830 1.830
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.896 0.000 0.000
y 0.000 -25.419 0.000
z 0.000 0.000 -17.998
Traceless
 xyz
x 4.812 0.000 0.000
y 0.000 -7.971 0.000
z 0.000 0.000 3.159
Polar
3z2-r26.318
x2-y28.523
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.193 0.000 0.000
y 0.000 4.422 0.000
z 0.000 0.000 4.116


<r2> (average value of r2) Å2
<r2> 54.017
(<r2>)1/2 7.350