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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: PBEPBE/TZVP

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/TZVP
 hartrees
Energy at 0K-151.075490
Energy at 298.15K-151.083405
HF Energy-151.075490
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.622920
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/TZVP
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 3404 3366 1.92      
2 A1 2986 2952 35.08      
3 A1 1620 1602 50.40      
4 A1 1427 1411 0.76      
5 A1 1058 1046 35.69      
6 A1 806 797 5.41      
7 A1 444 439 3.01      
8 A2 3494 3455 0.00      
9 A2 1356 1341 0.00      
10 A2 1047 1035 0.00      
11 A2 260 257 0.00      
12 B1 3492 3453 0.00      
13 B1 3028 2994 24.43      
14 B1 1327 1312 0.24      
15 B1 824 814 0.17      
16 B1 399 394 87.50      
17 B2 3404 3366 0.25      
18 B2 1608 1590 3.10      
19 B2 1348 1333 17.61      
20 B2 1033 1022 76.83      
21 B2 731 723 462.07      

Unscaled Zero Point Vibrational Energy (zpe) 17547.5 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 17350.9 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/TZVP
ABC
1.18704 0.29634 0.26984

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.546
N2 0.000 1.271 -0.183
N3 0.000 -1.271 -0.183
H4 0.883 0.000 1.204
H5 -0.883 0.000 1.204
H6 0.824 1.350 -0.782
H7 -0.824 1.350 -0.782
H8 -0.824 -1.350 -0.782
H9 0.824 -1.350 -0.782

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46501.46501.10061.10062.06602.06602.06602.0660
N21.46502.54162.07742.07741.02231.02232.81242.8124
N31.46502.54162.07742.07742.81242.81241.02231.0223
H41.10062.07742.07741.76592.40232.94642.94642.4023
H51.10062.07742.07741.76592.94642.40232.40232.9464
H62.06601.02232.81242.40232.94641.64793.16402.7010
H72.06601.02232.81242.94642.40231.64792.70103.1640
H82.06602.81241.02232.94642.40233.16402.70101.6479
H92.06602.81241.02232.40232.94642.70103.16401.6479

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 111.076 C1 N2 H7 111.076
C1 N3 H8 111.076 C1 N3 H9 111.076
N2 C1 N3 120.314 N2 C1 H4 107.283
N2 C1 H5 107.283 N3 C1 H4 107.283
N3 C1 H5 107.283 H4 C1 H5 106.688
H6 N2 H7 107.416 H8 N3 H9 107.416
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.252      
2 N -0.382      
3 N -0.382      
4 H 0.144      
5 H 0.144      
6 H 0.182      
7 H 0.182      
8 H 0.182      
9 H 0.182      


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 -1.944 1.944
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.043 0.000 0.000
y 0.000 -26.444 0.000
z 0.000 0.000 -18.770
Traceless
 xyz
x 5.564 0.000 0.000
y 0.000 -8.538 0.000
z 0.000 0.000 2.974
Polar
3z2-r25.948
x2-y29.401
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.546 0.000 0.000
y 0.000 5.256 0.000
z 0.000 0.000 4.598


<r2> (average value of r2) Å2
<r2> 54.744
(<r2>)1/2 7.399