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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-150.868216
Energy at 298.15K-150.876283
HF Energy-150.262831
Counterpoise corrected energy-150.868216
CP Energy at 298.15K-150.876283
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.241441
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 QCISD/6-31G(2df,p)
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 3538 3352 0.16      
2 A1 3107 2944 34.67      
3 A1 1702 1613 40.26      
4 A1 1528 1448 0.02      
5 A1 1146 1086 31.01      
6 A1 901 854 0.02      
7 A1 463 438 5.78      
8 A2 3624 3433 0.00      
9 A2 1427 1352 0.00      
10 A2 1093 1035 0.00      
11 A2 273 258 0.00      
12 B1 3623 3432 0.24      
13 B1 3155 2989 22.73      
14 B1 1403 1329 0.35      
15 B1 866 821 0.74      
16 B1 396 375 91.06      
17 B2 3538 3352 0.08      
18 B2 1693 1604 2.42      
19 B2 1418 1343 21.88      
20 B2 1123 1064 54.05      
21 B2 858 813 383.48      

Unscaled Zero Point Vibrational Energy (zpe) 18436.8 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 17467.0 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 QCISD/6-31G(2df,p)
ABC
1.17431 0.30483 0.27522

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.558
N2 0.000 1.259 -0.184
N3 0.000 -1.259 -0.184
H4 0.879 0.000 1.206
H5 -0.879 0.000 1.206
H6 0.810 1.293 -0.795
H7 -0.810 1.293 -0.795
H8 -0.810 -1.293 -0.795
H9 0.810 -1.293 -0.795

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46111.46111.09281.09282.03852.03852.03852.0385
N21.46112.51722.07172.07171.01461.01462.74532.7453
N31.46112.51722.07172.07172.74532.74531.01461.0146
H41.09282.07172.07171.75882.38322.92042.92042.3832
H51.09282.07172.07171.75882.92042.38322.38322.9204
H62.03851.01462.74532.38322.92041.61973.05062.5851
H72.03851.01462.74532.92042.38321.61972.58513.0506
H82.03852.74531.01462.92042.38323.05062.58511.6197
H92.03852.74531.01462.38322.92042.58513.05061.6197

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.532 C1 N2 H7 109.532
C1 N3 H8 109.532 C1 N3 H9 109.532
N2 C1 N3 118.945 N2 C1 H4 107.549
N2 C1 H5 107.549 N3 C1 H4 107.549
N3 C1 H5 107.549 H4 C1 H5 107.175
H6 N2 H7 105.917 H8 N3 H9 105.917
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability