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All results from a given calculation for H2NCHCHNH2 (diaminoethylene)

using model chemistry: CCD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCD/3-21G
 hartrees
Energy at 0K-187.456751
Energy at 298.15K 
HF Energy-187.032968
Nuclear repulsion energy116.057142
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 CCD/3-21G
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 3536 3438 0.06      
2 A 3433 3338 0.20      
3 A 3135 3049 0.03      
4 A 1750 1701 12.32      
5 A 1725 1678 8.26      
6 A 1369 1331 1.52      
7 A 1293 1257 0.68      
8 A 1040 1011 4.79      
9 A 951 925 77.94      
10 A 737 716 223.90      
11 A 552 537 0.00      
12 A 311 303 0.03      
13 A 250 244 25.08      
14 B 3536 3438 0.36      
15 B 3432 3337 0.36      
16 B 3138 3051 42.02      
17 B 1745 1697 44.20      
18 B 1425 1385 1.95      
19 B 1172 1139 0.02      
20 B 1148 1116 26.28      
21 B 797 775 27.79      
22 B 670 651 449.50      
23 B 334 324 23.39      
24 B 211 205 151.21      

Unscaled Zero Point Vibrational Energy (zpe) 18844.6 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 18322.6 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 CCD/3-21G
ABC
1.41237 0.12883 0.11988

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.319 0.592 0.033
C2 -0.319 -0.592 0.033
N3 -0.319 1.877 -0.098
N4 0.319 -1.877 -0.098
H5 1.410 0.637 0.038
H6 -1.410 -0.637 0.038
H7 -1.337 1.820 -0.159
H8 1.337 -1.820 -0.159
H9 -0.027 2.554 0.609
H10 0.027 -2.554 0.609

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.34531.44032.47281.09182.12102.07032.62522.07333.2115
C21.34532.47281.44032.12101.09182.62522.07033.21152.0733
N31.44032.47283.80782.13192.74361.02184.05121.02154.5001
N42.47281.44033.80782.74362.13194.05121.02184.50011.0215
H51.09182.12102.13192.74363.09372.99742.46532.46303.5235
H62.12101.09182.74362.13193.09372.46532.99743.52352.4630
H72.07032.62521.02184.05122.99742.46534.51651.68644.6452
H82.62522.07034.05121.02182.46532.99744.51654.64521.6864
H92.07333.21151.02154.50012.46303.52351.68644.64525.1075
H103.21152.07334.50011.02153.52352.46304.64521.68645.1075

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.136 C1 C2 H6 120.626
C1 N3 H7 113.367 C1 N3 H9 113.656
C2 C1 N3 125.136 C2 C1 H5 120.626
C2 N4 H8 113.367 C2 N4 H10 113.656
N3 C1 H5 113.987 N4 C2 H6 113.987
H7 N3 H9 111.242 H8 N4 H10 111.242
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability