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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: QCISD/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 QCISD/cc-pVTZ
 hartrees
Energy at 0K-150.947314
Energy at 298.15K-150.955353
HF Energy-150.305492
Counterpoise corrected energy-150.947314
CP Energy at 298.15K-150.955353
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.354091
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/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 3519 3363 0.87      
2 A1 3083 2946 36.24      
3 A1 1686 1611 39.93      
4 A1 1516 1449 0.01      
5 A1 1127 1077 34.08      
6 A1 886 847 0.18      
7 A1 461 441 4.60      
8 A2 3604 3444 0.00      
9 A2 1420 1356 0.00      
10 A2 1089 1040 0.00      
11 A2 263 251 0.00      
12 B1 3602 3442 0.28      
13 B1 3126 2986 25.60      
14 B1 1393 1331 0.49      
15 B1 861 823 1.02      
16 B1 387 369 85.03      
17 B2 3519 3363 1.69      
18 B2 1676 1601 3.74      
19 B2 1409 1347 21.61      
20 B2 1115 1065 67.29      
21 B2 834 797 381.68      

Unscaled Zero Point Vibrational Energy (zpe) 18287.4 cm-1
Scaled (by 0.9555) Zero Point Vibrational Energy (zpe) 17473.6 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/cc-pVTZ
ABC
1.18010 0.30513 0.27571

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.556
N2 0.000 1.257 -0.185
N3 0.000 -1.257 -0.185
H4 0.876 0.000 1.204
H5 -0.876 0.000 1.204
H6 0.810 1.301 -0.790
H7 -0.810 1.301 -0.790
H8 -0.810 -1.301 -0.790
H9 0.810 -1.301 -0.790

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45881.45881.08961.08962.04002.04002.04002.0400
N21.45882.51332.06752.06751.01221.01222.75062.7506
N31.45882.51332.06752.06752.75062.75061.01221.0122
H41.08962.06752.06751.75282.38142.91752.91752.3814
H51.08962.06752.06751.75282.91752.38142.38142.9175
H62.04001.01222.75062.38142.91751.62083.06612.6027
H72.04001.01222.75062.91752.38141.62082.60273.0661
H82.04002.75061.01222.91752.38143.06612.60271.6208
H92.04002.75061.01222.38142.91752.60273.06611.6208

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.974 C1 N2 H7 109.974
C1 N3 H8 109.974 C1 N3 H9 109.974
N2 C1 N3 118.952 N2 C1 H4 107.565
N2 C1 H5 107.565 N3 C1 H4 107.565
N3 C1 H5 107.565 H4 C1 H5 107.089
H6 N2 H7 106.372 H8 N3 H9 106.372
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability