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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: B1B95/6-31G(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 B1B95/6-31G(2df,p)
 hartrees
Energy at 0K-151.141886
Energy at 298.15K-151.149891
HF Energy-151.141886
Nuclear repulsion energy83.518295
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 B1B95/6-31G(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 3530 3380 0.59      
2 A1 3077 2946 40.76      
3 A1 1671 1600 35.77      
4 A1 1487 1425 0.15      
5 A1 1122 1075 31.37      
6 A1 875 838 0.56      
7 A1 454 435 4.48      
8 A2 3618 3465 0.00      
9 A2 1403 1344 0.00      
10 A2 1075 1029 0.00      
11 A2 262 251 0.00      
12 B1 3616 3463 0.17      
13 B1 3124 2992 24.94      
14 B1 1376 1317 0.30      
15 B1 849 813 0.18      
16 B1 395 379 85.22      
17 B2 3531 3381 0.00      
18 B2 1661 1590 3.13      
19 B2 1390 1332 21.54      
20 B2 1111 1064 66.05      
21 B2 803 769 391.81      

Unscaled Zero Point Vibrational Energy (zpe) 18214.0 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 17443.5 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 B1B95/6-31G(2df,p)
ABC
1.18945 0.30617 0.27710

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G(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 1.254 -0.183
N3 0.000 -1.254 -0.183
H4 0.877 0.000 1.203
H5 -0.877 0.000 1.203
H6 0.811 1.302 -0.788
H7 -0.811 1.302 -0.788
H8 -0.811 -1.302 -0.788
H9 0.811 -1.302 -0.788

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45241.45241.09281.09282.03542.03542.03542.0354
N21.45242.50772.06392.06391.01281.01282.74872.7487
N31.45242.50772.06392.06392.74872.74871.01281.0128
H41.09282.06392.06391.75352.37942.91622.91622.3794
H51.09282.06392.06391.75352.91622.37942.37942.9162
H62.03541.01282.74872.37942.91621.62123.06732.6039
H72.03541.01282.74872.91622.37941.62122.60393.0673
H82.03542.74871.01282.91622.37943.06732.60391.6212
H92.03542.74871.01282.37942.91622.60393.06731.6212

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.037 C1 N2 H7 110.037
C1 N3 H8 110.037 C1 N3 H9 110.037
N2 C1 N3 119.379 N2 C1 H4 107.531
N2 C1 H5 107.531 N3 C1 H4 107.531
N3 C1 H5 107.531 H4 C1 H5 106.710
H6 N2 H7 106.332 H8 N3 H9 106.332
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.102      
2 N -0.534      
3 N -0.534      
4 H 0.127      
5 H 0.127      
6 H 0.229      
7 H 0.229      
8 H 0.229      
9 H 0.229      


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 -1.848 1.848
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.606 0.000 0.000
y 0.000 -25.229 0.000
z 0.000 0.000 -17.801
Traceless
 xyz
x 4.909 0.000 0.000
y 0.000 -8.026 0.000
z 0.000 0.000 3.117
Polar
3z2-r26.234
x2-y28.623
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.029 0.000 0.000
y 0.000 4.125 0.000
z 0.000 0.000 3.926


<r2> (average value of r2) Å2
<r2> 53.031
(<r2>)1/2 7.282