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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP2/aug-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 MP2/aug-cc-pVTZ
 hartrees
Energy at 0K-150.934773
Energy at 298.15K-150.942748
HF Energy-150.309171
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.291445
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/aug-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 3520 3354 0.03      
2 A1 3101 2955 26.49      
3 A1 1660 1582 43.90      
4 A1 1509 1438 0.18      
5 A1 1102 1050 35.83      
6 A1 846 806 3.16      
7 A1 455 434 2.18      
8 A2 3621 3451 0.00      
9 A2 1408 1342 0.00      
10 A2 1073 1022 0.00      
11 A2 257 245 0.00      
12 B1 3618 3448 8.80      
13 B1 3158 3009 17.58      
14 B1 1371 1306 0.51      
15 B1 851 811 0.62      
16 B1 377 359 81.88      
17 B2 3521 3355 4.41      
18 B2 1649 1571 6.73      
19 B2 1393 1328 16.88      
20 B2 1099 1047 85.77      
21 B2 781 744 371.72      

Unscaled Zero Point Vibrational Energy (zpe) 18185.4 cm-1
Scaled (by 0.9529) Zero Point Vibrational Energy (zpe) 17328.9 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/aug-cc-pVTZ
ABC
1.18689 0.30344 0.27499

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.553
N2 0.000 1.257 -0.184
N3 0.000 -1.257 -0.184
H4 0.878 0.000 1.198
H5 -0.878 0.000 1.198
H6 0.815 1.322 -0.783
H7 -0.815 1.322 -0.783
H8 -0.815 -1.322 -0.783
H9 0.815 -1.322 -0.783

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45781.45781.08891.08892.04842.04842.04842.0484
N21.45782.51502.06432.06431.01311.01312.77032.7703
N31.45782.51502.06432.06432.77032.77031.01311.0131
H41.08892.06432.06431.75512.38212.92132.92132.3821
H51.08892.06432.06431.75512.92132.38212.38212.9213
H62.04841.01312.77032.38212.92131.62943.10532.6435
H72.04841.01312.77032.92132.38211.62942.64353.1053
H82.04842.77031.01312.92132.38213.10532.64351.6294
H92.04842.77031.01312.38212.92132.64353.10531.6294

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.713 C1 N2 H7 110.713
C1 N3 H8 110.713 C1 N3 H9 110.713
N2 C1 N3 119.217 N2 C1 H4 107.427
N2 C1 H5 107.427 N3 C1 H4 107.427
N3 C1 H5 107.427 H4 C1 H5 107.404
H6 N2 H7 107.067 H8 N3 H9 107.067
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability