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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CCSD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD/cc-pVDZ
 hartrees
Energy at 0K-150.787794
Energy at 298.15K-150.795908
HF Energy-150.256099
Nuclear repulsion energy82.868311
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 CCSD/cc-pVDZ
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 3482 3298 4.30      
2 A1 3080 2918 45.85      
3 A1 1674 1586 30.81      
4 A1 1496 1417 0.02      
5 A1 1151 1090 26.30      
6 A1 920 872 0.81      
7 A1 459 435 8.10      
8 A2 3566 3378 0.00      
9 A2 1414 1340 0.00      
10 A2 1094 1037 0.00      
11 A2 285 270 0.00      
12 B1 3564 3376 1.68      
13 B1 3131 2966 32.73      
14 B1 1395 1322 1.32      
15 B1 865 819 1.72      
16 B1 415 393 90.32      
17 B2 3482 3298 0.01      
18 B2 1669 1581 1.18      
19 B2 1405 1331 33.58      
20 B2 1131 1071 59.55      
21 B2 883 836 343.56      

Unscaled Zero Point Vibrational Energy (zpe) 18279.1 cm-1
Scaled (by 0.9473) Zero Point Vibrational Energy (zpe) 17315.8 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 CCSD/cc-pVDZ
ABC
1.15846 0.30379 0.27391

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.560
N2 0.000 1.263 -0.183
N3 0.000 -1.263 -0.183
H4 0.888 0.000 1.217
H5 -0.888 0.000 1.217
H6 0.812 1.275 -0.808
H7 -0.812 1.275 -0.808
H8 -0.812 -1.275 -0.808
H9 0.812 -1.275 -0.808

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46531.46531.10491.10492.03882.03882.03882.0388
N21.46532.52642.08432.08431.02531.02532.73732.7373
N31.46532.52642.08432.08432.73732.73731.02531.0253
H41.10492.08432.08431.77592.39452.93582.93582.3945
H51.10492.08432.08431.77592.93582.39452.39452.9358
H62.03881.02532.73732.39452.93581.62473.02332.5496
H72.03881.02532.73732.93582.39451.62472.54963.0233
H82.03882.73731.02532.93582.39453.02332.54961.6247
H92.03882.73731.02532.39452.93582.54963.02331.6247

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 108.595 C1 N2 H7 108.595
C1 N3 H8 108.595 C1 N3 H9 108.595
N2 C1 N3 119.105 N2 C1 H4 107.551
N2 C1 H5 107.551 N3 C1 H4 107.551
N3 C1 H5 107.551 H4 C1 H5 106.963
H6 N2 H7 104.803 H8 N3 H9 104.803
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability