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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP2/CEP-31G*

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/CEP-31G*
 hartrees
Energy at 0K-28.763104
Energy at 298.15K-28.771136
HF Energy-28.321583
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy49.812104
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/CEP-31G*
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 3506 3329 0.90      
2 A1 3129 2970 46.01      
3 A1 1708 1621 52.79      
4 A1 1511 1434 0.18      
5 A1 1122 1065 39.50      
6 A1 891 846 0.01      
7 A1 454 431 6.58      
8 A2 3618 3435 0.00      
9 A2 1416 1344 0.00      
10 A2 1085 1030 0.00      
11 A2 281 267 0.00      
12 B1 3616 3433 0.01      
13 B1 3199 3037 33.63      
14 B1 1388 1318 0.57      
15 B1 851 808 1.43      
16 B1 403 383 127.02      
17 B2 3508 3331 0.13      
18 B2 1699 1613 4.28      
19 B2 1404 1333 25.98      
20 B2 1102 1046 93.21      
21 B2 832 790 424.09      

Unscaled Zero Point Vibrational Energy (zpe) 18360.8 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 17431.7 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/CEP-31G*
ABC
1.15880 0.29400 0.26669

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.560
N2 0.000 1.280 -0.185
N3 0.000 -1.280 -0.185
H4 0.893 0.000 1.208
H5 -0.893 0.000 1.208
H6 0.823 1.327 -0.796
H7 -0.823 1.327 -0.796
H8 -0.823 -1.327 -0.796
H9 0.823 -1.327 -0.796

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.48141.48141.10321.10322.06852.06852.06852.0685
N21.48142.56032.09212.09211.02591.02592.80182.8018
N31.48142.56032.09212.09212.80182.80181.02591.0259
H41.10322.09212.09211.78642.40452.95332.95332.4045
H51.10322.09212.09211.78642.95332.40452.40452.9533
H62.06851.02592.80182.40452.95331.64603.12372.6549
H72.06851.02592.80182.95332.40451.64602.65493.1237
H82.06852.80181.02592.95332.40453.12372.65491.6460
H92.06852.80181.02592.40452.95332.65493.12371.6460

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.838 C1 N2 H7 109.838
C1 N3 H8 109.838 C1 N3 H9 109.838
N2 C1 N3 119.573 N2 C1 H4 107.178
N2 C1 H5 107.178 N3 C1 H4 107.178
N3 C1 H5 107.178 H4 C1 H5 108.123
H6 N2 H7 106.684 H8 N3 H9 106.684
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability