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All results from a given calculation for H2NCHCHNH2 (diaminoethylene)

using model chemistry: QCISD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at QCISD/cc-pVDZ
 hartrees
Energy at 0K-188.760103
Energy at 298.15K 
HF Energy-188.104873
Nuclear repulsion energy116.613237
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-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 A 3595 3449 0.37      
2 A 3502 3360 0.66      
3 A 3176 3047 0.01      
4 A 1788 1715 0.01      
5 A 1649 1582 22.13      
6 A 1336 1281 0.81      
7 A 1303 1250 0.16      
8 A 1061 1018 2.73      
9 A 946 907 76.75      
10 A 898 862 66.75      
11 A 552 530 0.38      
12 A 311 299 0.23      
13 A 255 244 14.77      
14 B 3595 3449 0.49      
15 B 3501 3359 0.51      
16 B 3175 3046 45.76      
17 B 1658 1590 32.03      
18 B 1400 1343 10.85      
19 B 1195 1147 63.46      
20 B 1144 1097 0.38      
21 B 864 829 373.83      
22 B 778 746 30.26      
23 B 338 325 34.75      
24 B 254 244 83.73      

Unscaled Zero Point Vibrational Energy (zpe) 19135.5 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 18358.6 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-pVDZ
ABC
1.40097 0.13059 0.12149

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.317 0.596 0.025
C2 -0.317 -0.596 0.025
N3 -0.317 1.869 -0.114
N4 0.317 -1.869 -0.114
H5 1.416 0.638 0.024
H6 -1.416 -0.638 0.024
H7 -1.330 1.765 -0.023
H8 1.330 -1.765 -0.023
H9 -0.020 2.491 0.643
H10 0.020 -2.491 0.643

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.35001.42812.46881.09982.12712.01982.56992.02093.1620
C21.35002.46881.42812.12711.09982.56992.01983.16202.0209
N31.42812.46883.79072.12902.74091.02273.99041.02334.4374
N42.46881.42813.79072.74092.12903.99041.02274.43741.0233
H51.09982.12712.12902.74093.10572.96802.40552.42373.4816
H62.12711.09982.74092.12903.10572.40552.96803.48162.4237
H72.01982.56991.02273.99042.96802.40554.42001.63884.5142
H82.56992.01983.99041.02272.40552.96804.42004.51421.6388
H92.02093.16201.02334.43742.42373.48161.63884.51424.9817
H103.16202.02094.43741.02333.48162.42374.51421.63884.9817

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.388 C1 C2 H6 120.171
C1 N3 H7 109.894 C1 N3 H9 109.954
C2 C1 N3 125.388 C2 C1 H5 120.171
C2 N4 H8 109.894 C2 N4 H10 109.954
N3 C1 H5 114.120 N4 C2 H6 114.120
H7 N3 H9 106.446 H8 N4 H10 106.446
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability