return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CCSD=FULL/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 CCSD=FULL/cc-pVTZ
 hartrees
Energy at 0K-150.992196
Energy at 298.15K-151.000261
HF Energy-150.305969
Nuclear repulsion energy83.676329
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=FULL/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 3547 3363 0.56      
2 A1 3107 2945 35.75      
3 A1 1693 1606 41.36      
4 A1 1526 1447 0.02      
5 A1 1130 1072 35.64      
6 A1 889 843 0.73      
7 A1 468 443 4.17      
8 A2 3628 3440 0.00      
9 A2 1427 1353 0.00      
10 A2 1092 1036 0.00      
11 A2 267 253 0.00      
12 B1 3626 3438 0.68      
13 B1 3128 2965 24.90      
14 B1 1399 1326 0.47      
15 B1 864 819 0.85      
16 B1 399 378 85.09      
17 B2 3547 3363 1.77      
18 B2 1682 1595 4.83      
19 B2 1417 1343 21.10      
20 B2 1129 1071 71.30      
21 B2 827 784 385.98      

Unscaled Zero Point Vibrational Energy (zpe) 18394.5 cm-1
Scaled (by 0.9481) Zero Point Vibrational Energy (zpe) 17439.8 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=FULL/cc-pVTZ
ABC
1.18884 0.30761 0.27807

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.554
N2 0.000 1.250 -0.185
N3 0.000 -1.250 -0.185
H4 0.872 0.000 1.199
H5 -0.872 0.000 1.199
H6 0.810 1.302 -0.784
H7 -0.810 1.302 -0.784
H8 -0.810 -1.302 -0.784
H9 0.810 -1.302 -0.784

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45221.45221.08511.08512.03502.03502.03502.0350
N21.45222.50092.05892.05891.00931.00932.74392.7439
N31.45222.50092.05892.05892.74392.74391.00931.0093
H41.08512.05892.05891.74452.37342.90852.90852.3734
H51.08512.05892.05891.74452.90852.37342.37342.9085
H62.03501.00932.74392.37342.90851.62003.06612.6033
H72.03501.00932.74392.90852.37341.62002.60333.0661
H82.03502.74391.00932.90852.37343.06612.60331.6200
H92.03502.74391.00932.37342.90852.60333.06611.6200

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.235 C1 N2 H7 110.235
C1 N3 H8 110.235 C1 N3 H9 110.235
N2 C1 N3 118.883 N2 C1 H4 107.603
N2 C1 H5 107.603 N3 C1 H4 107.603
N3 C1 H5 107.603 H4 C1 H5 107.001
H6 N2 H7 106.746 H8 N3 H9 106.746
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability