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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: PBE1PBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBE1PBE/6-31+G**
 hartrees
Energy at 0K-151.049498
Energy at 298.15K-151.057481
HF Energy-151.049498
Nuclear repulsion energy83.254925
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 PBE1PBE/6-31+G**
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 3550 3391 0.13      
2 A1 3086 2948 34.99      
3 A1 1677 1602 69.88      
4 A1 1488 1421 0.65      
5 A1 1097 1048 40.90      
6 A1 841 804 14.19      
7 A1 464 443 1.67      
8 A2 3651 3488 0.00      
9 A2 1399 1337 0.00      
10 A2 1070 1022 0.00      
11 A2 265 253 0.00      
12 B1 3649 3486 5.21      
13 B1 3137 2997 25.52      
14 B1 1369 1308 0.00      
15 B1 847 809 0.14      
16 B1 400 382 100.63      
17 B2 3551 3392 1.21      
18 B2 1667 1593 6.85      
19 B2 1393 1330 22.58      
20 B2 1110 1061 120.56      
21 B2 746 713 448.00      

Unscaled Zero Point Vibrational Energy (zpe) 18228.1 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 17413.3 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 PBE1PBE/6-31+G**
ABC
1.19701 0.30198 0.27472

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.545
N2 0.000 1.257 -0.184
N3 0.000 -1.257 -0.184
H4 0.879 0.000 1.198
H5 -0.879 0.000 1.198
H6 0.821 1.349 -0.773
H7 -0.821 1.349 -0.773
H8 -0.821 -1.349 -0.773
H9 0.821 -1.349 -0.773

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45291.45291.09491.09492.05702.05702.05702.0570
N21.45292.51302.06462.06461.01431.01432.79442.7944
N31.45292.51302.06462.06462.79442.79441.01431.0143
H41.09492.06462.06461.75772.38952.93162.93162.3895
H51.09492.06462.06461.75772.93162.38952.38952.9316
H62.05701.01432.79442.38952.93161.64123.15782.6978
H72.05701.01432.79442.93162.38951.64122.69783.1578
H82.05702.79441.01432.93162.38953.15782.69781.6412
H92.05702.79441.01432.38952.93162.69783.15781.6412

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 111.735 C1 N2 H7 111.735
C1 N3 H8 111.735 C1 N3 H9 111.735
N2 C1 N3 119.729 N2 C1 H4 107.424
N2 C1 H5 107.424 N3 C1 H4 107.424
N3 C1 H5 107.424 H4 C1 H5 106.767
H6 N2 H7 107.996 H8 N3 H9 107.996
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.250      
2 N -0.628      
3 N -0.628      
4 H 0.165      
5 H 0.165      
6 H 0.294      
7 H 0.294      
8 H 0.294      
9 H 0.294      


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 -1.991 1.991
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.785 0.000 0.000
y 0.000 -26.857 0.000
z 0.000 0.000 -18.709
Traceless
 xyz
x 5.998 0.000 0.000
y 0.000 -9.110 0.000
z 0.000 0.000 3.112
Polar
3z2-r26.223
x2-y210.072
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.241 0.000 0.000
y 0.000 5.406 0.000
z 0.000 0.000 4.546


<r2> (average value of r2) Å2
<r2> 54.123
(<r2>)1/2 7.357