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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP2/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/LANL2DZ
 hartrees
Energy at 0K-150.504579
Energy at 298.15K-150.512378
HF Energy-150.201005
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy81.286168
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 MP2/LANL2DZ
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 3526 3396 0.20      
2 A1 3087 2973 48.94      
3 A1 1719 1655 56.93      
4 A1 1510 1455 2.15      
5 A1 1062 1022 91.46      
6 A1 726 700 71.15      
7 A1 451 434 0.06      
8 A2 3659 3524 0.00      
9 A2 1398 1346 0.00      
10 A2 1055 1016 0.00      
11 A2 245 236 0.00      
12 B1 3660 3525 1.45      
13 B1 3164 3048 37.41      
14 B1 1368 1317 1.10      
15 B1 836 805 0.27      
16 B1 399 384 109.20      
17 B2 3528 3398 0.75      
18 B2 1708 1645 12.65      
19 B2 1411 1359 10.03      
20 B2 1050 1012 103.58      
21 B2 593 571 604.55      

Unscaled Zero Point Vibrational Energy (zpe) 18076.5 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 17409.5 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 MP2/LANL2DZ
ABC
1.16570 0.28235 0.25873

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.558
N2 0.000 1.288 -0.200
N3 0.000 -1.288 -0.200
H4 0.893 0.000 1.201
H5 -0.893 0.000 1.201
H6 0.848 1.471 -0.739
H7 -0.848 1.471 -0.739
H8 -0.848 -1.471 -0.739
H9 0.848 -1.471 -0.739

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.49431.49431.10061.10062.13702.13702.13702.1370
N21.49432.57632.10212.10211.02181.02182.93702.9370
N31.49432.57632.10212.10212.93702.93701.02181.0218
H41.10062.10212.10211.78562.43592.99372.99372.4359
H51.10062.10212.10211.78562.99372.43592.43592.9937
H62.13701.02182.93702.43592.99371.69613.39672.9429
H72.13701.02182.93702.99372.43591.69612.94293.3967
H82.13702.93701.02182.99372.43593.39672.94291.6961
H92.13702.93701.02182.43592.99372.94293.39671.6961

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 114.986 C1 N2 H7 114.986
C1 N3 H8 114.986 C1 N3 H9 114.986
N2 C1 N3 119.091 N2 C1 H4 107.240
N2 C1 H5 107.240 N3 C1 H4 107.240
N3 C1 H5 107.240 H4 C1 H5 108.433
H6 N2 H7 112.184 H8 N3 H9 112.184
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