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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: LSDA/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 LSDA/6-31G
 hartrees
Energy at 0K-150.360386
Energy at 298.15K 
HF Energy-150.360386
Nuclear repulsion energy82.954319
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 LSDA/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3494 3423 0.11      
2 A1 2990 2930 49.64      
3 A1 1642 1609 51.17      
4 A1 1441 1412 4.64      
5 A1 1083 1061 52.78      
6 A1 629 616 141.29      
7 A1 437 428 25.53      
8 A2 3624 3551 0.00      
9 A2 1355 1327 0.00      
10 A2 1018 998 0.00      
11 A2 223 218 0.00      
12 B1 3624 3551 4.25      
13 B1 3044 2982 27.94      
14 B1 1305 1278 1.16      
15 B1 810 794 5.06      
16 B1 429 421 80.12      
17 B2 3497 3426 0.27      
18 B2 1631 1598 23.87      
19 B2 1363 1335 4.71      
20 B2 1122 1099 154.13      
21 B2 378 370 610.22      

Unscaled Zero Point Vibrational Energy (zpe) 17569.0 cm-1
Scaled (by 0.9797) Zero Point Vibrational Energy (zpe) 17212.3 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 LSDA/6-31G
See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.527
N2 0.000 1.247 -0.198
N3 0.000 -1.247 -0.198
H4 0.882 0.000 1.195
H5 -0.882 0.000 1.195
H6 0.854 1.493 -0.696
H7 -0.854 1.493 -0.696
H8 -0.854 -1.493 -0.696
H9 0.854 -1.493 -0.696

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.44211.44211.10601.10602.11082.11082.11082.1108
N21.44212.49312.06652.06651.01901.01902.91252.9125
N31.44212.49312.06652.06652.91252.91251.01901.0190
H41.10602.06652.06651.76422.40932.96942.96942.4093
H51.10602.06652.06651.76422.96942.40932.40932.9694
H62.11081.01902.91252.40932.96941.70773.43972.9859
H72.11081.01902.91252.96942.40931.70772.98593.4397
H82.11082.91251.01902.96942.40933.43972.98591.7077
H92.11082.91251.01902.40932.96942.98593.43971.7077

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 117.067 C1 N2 H7 117.067
C1 N3 H8 117.067 C1 N3 H9 117.067
N2 C1 N3 119.626 N2 C1 H4 107.656
N2 C1 H5 107.656 N3 C1 H4 107.656
N3 C1 H5 107.656 H4 C1 H5 105.802
H6 N2 H7 113.847 H8 N3 H9 113.847
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.152      
2 N -0.685      
3 N -0.685      
4 H 0.181      
5 H 0.181      
6 H 0.290      
7 H 0.290      
8 H 0.290      
9 H 0.290      


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 -2.029 2.029
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.142 0.000 0.000
y 0.000 -23.268 0.000
z 0.000 0.000 -18.892
Traceless
 xyz
x 4.938 0.000 0.000
y 0.000 -5.751 0.000
z 0.000 0.000 0.813
Polar
3z2-r21.625
x2-y27.126
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.915 0.000 0.000
y 0.000 4.180 0.000
z 0.000 0.000 3.249


<r2> (average value of r2) Å2
<r2> 54.290
(<r2>)1/2 7.368