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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: B3LYP/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYP/cc-pVTZ
 hartrees
Energy at 0K-151.276153
Energy at 298.15K-151.284119
HF Energy-151.276153
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.107512
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 B3LYP/cc-pVTZ
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 3480 3364 1.93      
2 A1 3045 2943 39.30      
3 A1 1666 1610 39.75      
4 A1 1491 1441 0.09      
5 A1 1088 1052 36.72      
6 A1 841 813 1.81      
7 A1 455 440 2.93      
8 A2 3562 3443 0.00      
9 A2 1397 1351 0.00      
10 A2 1074 1038 0.00      
11 A2 251 243 0.00      
12 B1 3560 3441 0.07      
13 B1 3081 2978 27.26      
14 B1 1369 1323 0.29      
15 B1 849 821 0.14      
16 B1 387 374 78.94      
17 B2 3481 3364 0.84      
18 B2 1655 1599 4.06      
19 B2 1391 1344 16.80      
20 B2 1058 1022 70.48      
21 B2 778 752 428.21      

Unscaled Zero Point Vibrational Energy (zpe) 17978.6 cm-1
Scaled (by 0.9666) Zero Point Vibrational Energy (zpe) 17378.1 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 B3LYP/cc-pVTZ
ABC
1.18874 0.30100 0.27310

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.551
N2 0.000 1.262 -0.184
N3 0.000 -1.262 -0.184
H4 0.877 0.000 1.200
H5 -0.877 0.000 1.200
H6 0.815 1.333 -0.782
H7 -0.815 1.333 -0.782
H8 -0.815 -1.333 -0.782
H9 0.815 -1.333 -0.782

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46071.46071.09071.09072.05402.05402.05402.0540
N21.46072.52422.06832.06831.01351.01352.78512.7851
N31.46072.52422.06832.06832.78512.78511.01351.0135
H41.09072.06832.06831.75312.38942.92722.92722.3894
H51.09072.06832.06831.75312.92722.38942.38942.9272
H62.05401.01352.78512.38942.92721.63103.12542.6661
H72.05401.01352.78512.92722.38941.63102.66613.1254
H82.05402.78511.01352.92722.38943.12542.66611.6310
H92.05402.78511.01352.38942.92722.66613.12541.6310

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.934 C1 N2 H7 110.934
C1 N3 H8 110.934 C1 N3 H9 110.934
N2 C1 N3 119.548 N2 C1 H4 107.432
N2 C1 H5 107.432 N3 C1 H4 107.432
N3 C1 H5 107.432 H4 C1 H5 106.960
H6 N2 H7 107.148 H8 N3 H9 107.148
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.028      
2 N -0.314      
3 N -0.314      
4 H 0.095      
5 H 0.095      
6 H 0.117      
7 H 0.117      
8 H 0.117      
9 H 0.117      


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 -1.768 1.768
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.020 0.000 0.000
y 0.000 -25.814 0.000
z 0.000 0.000 -18.506
Traceless
 xyz
x 5.140 0.000 0.000
y 0.000 -8.051 0.000
z 0.000 0.000 2.911
Polar
3z2-r25.822
x2-y28.794
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.439 0.000 0.000
y 0.000 4.965 0.000
z 0.000 0.000 4.511


<r2> (average value of r2) Å2
<r2> 54.000
(<r2>)1/2 7.348