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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-150.314168
Energy at 298.15K-150.322046
HF Energy-150.314168
Nuclear repulsion energy82.196536
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 B3PW91/3-21G
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 3425 3292 5.56      
2 A1 3080 2960 40.04      
3 A1 1726 1659 34.66      
4 A1 1522 1463 3.43      
5 A1 1066 1025 54.74      
6 A1 716 688 23.78      
7 A1 441 424 2.01      
8 A2 3530 3393 0.00      
9 A2 1424 1369 0.00      
10 A2 1086 1043 0.00      
11 A2 282 271 0.00      
12 B1 3531 3394 1.54      
13 B1 3129 3007 26.13      
14 B1 1368 1315 0.23      
15 B1 831 799 0.35      
16 B1 437 420 116.00      
17 B2 3425 3292 1.12      
18 B2 1712 1646 2.72      
19 B2 1406 1351 3.29      
20 B2 1050 1009 41.96      
21 B2 572 549 599.36      

Unscaled Zero Point Vibrational Energy (zpe) 17879.2 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 17185.5 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 B3PW91/3-21G
ABC
1.18565 0.29096 0.26612

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.548
N2 0.000 1.276 -0.189
N3 0.000 -1.276 -0.189
H4 0.882 0.000 1.196
H5 -0.882 0.000 1.196
H6 0.839 1.403 -0.761
H7 -0.839 1.403 -0.761
H8 -0.839 -1.403 -0.761
H9 0.839 -1.403 -0.761

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.47351.47351.09461.09462.09432.09432.09432.0943
N21.47352.55202.07942.07941.02331.02332.86492.8649
N31.47352.55202.07942.07942.86492.86491.02331.0233
H41.09462.07942.07941.76472.40842.95982.95982.4084
H51.09462.07942.07941.76472.95982.40842.40842.9598
H62.09431.02332.86492.40842.95981.67733.26912.8060
H72.09431.02332.86492.95982.40841.67732.80603.2691
H82.09432.86491.02332.95982.40843.26912.80601.6773
H92.09432.86491.02332.40842.95982.80603.26911.6773

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 112.783 C1 N2 H7 112.783
C1 N3 H8 112.783 C1 N3 H9 112.783
N2 C1 N3 119.982 N2 C1 H4 107.215
N2 C1 H5 107.215 N3 C1 H4 107.215
N3 C1 H5 107.215 H4 C1 H5 107.438
H6 N2 H7 110.085 H8 N3 H9 110.085
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.163      
2 N -0.693      
3 N -0.693      
4 H 0.235      
5 H 0.235      
6 H 0.270      
7 H 0.270      
8 H 0.270      
9 H 0.270      


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 -2.209 2.209
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.253 0.000 0.000
y 0.000 -25.028 0.000
z 0.000 0.000 -17.634
Traceless
 xyz
x 5.078 0.000 0.000
y 0.000 -8.085 0.000
z 0.000 0.000 3.007
Polar
3z2-r26.014
x2-y28.775
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.628 0.000 0.000
y 0.000 3.505 0.000
z 0.000 0.000 3.033


<r2> (average value of r2) Å2
<r2> 54.783
(<r2>)1/2 7.402