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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: mPW1PW91/6-31G(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 mPW1PW91/6-31G(2df,p)
 hartrees
Energy at 0K-151.185110
Energy at 298.15K-151.193127
HF Energy-151.185110
Nuclear repulsion energy83.399423
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 mPW1PW91/6-31G(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 3531 3371 0.50      
2 A1 3073 2934 40.66      
3 A1 1676 1600 36.64      
4 A1 1490 1423 0.23      
5 A1 1124 1073 32.03      
6 A1 877 837 0.54      
7 A1 459 438 4.35      
8 A2 3618 3455 0.00      
9 A2 1408 1344 0.00      
10 A2 1080 1032 0.00      
11 A2 263 251 0.00      
12 B1 3617 3453 0.27      
13 B1 3120 2979 24.73      
14 B1 1382 1319 0.30      
15 B1 853 815 0.13      
16 B1 397 379 86.02      
17 B2 3531 3371 0.00      
18 B2 1666 1590 3.14      
19 B2 1395 1332 20.22      
20 B2 1109 1059 63.84      
21 B2 809 772 397.33      

Unscaled Zero Point Vibrational Energy (zpe) 18238.5 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 17412.3 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 mPW1PW91/6-31G(2df,p)
ABC
1.18823 0.30495 0.27611

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.550
N2 0.000 1.256 -0.183
N3 0.000 -1.256 -0.183
H4 0.878 0.000 1.204
H5 -0.878 0.000 1.204
H6 0.811 1.306 -0.788
H7 -0.811 1.306 -0.788
H8 -0.811 -1.306 -0.788
H9 0.811 -1.306 -0.788

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45441.45441.09431.09432.03822.03822.03822.0382
N21.45442.51262.06652.06651.01361.01362.75472.7547
N31.45442.51262.06652.06652.75472.75471.01361.0136
H41.09432.06652.06651.75582.38252.91982.91982.3825
H51.09432.06652.06651.75582.91982.38252.38252.9198
H62.03821.01362.75472.38252.91981.62263.07432.6112
H72.03821.01362.75472.91982.38251.62262.61123.0743
H82.03822.75471.01362.91982.38253.07432.61121.6226
H92.03822.75471.01362.38252.91982.61123.07431.6226

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.065 C1 N2 H7 110.065
C1 N3 H8 110.065 C1 N3 H9 110.065
N2 C1 N3 119.484 N2 C1 H4 107.508
N2 C1 H5 107.508 N3 C1 H4 107.508
N3 C1 H5 107.508 H4 C1 H5 106.685
H6 N2 H7 106.339 H8 N3 H9 106.339
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.137      
2 N -0.550      
3 N -0.550      
4 H 0.142      
5 H 0.142      
6 H 0.239      
7 H 0.239      
8 H 0.239      
9 H 0.239      


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 -1.865 1.865
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.564 0.000 0.000
y 0.000 -25.288 0.000
z 0.000 0.000 -17.778
Traceless
 xyz
x 4.969 0.000 0.000
y 0.000 -8.117 0.000
z 0.000 0.000 3.148
Polar
3z2-r26.295
x2-y28.724
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.015 0.000 0.000
y 0.000 4.140 0.000
z 0.000 0.000 3.916


<r2> (average value of r2) Å2
<r2> 53.169
(<r2>)1/2 7.292