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All results from a given calculation for H2NCHCHNH2 (diaminoethylene)

using model chemistry: CID/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 CID/3-21G*
 hartrees
Energy at 0K-187.406440
Energy at 298.15K 
HF Energy-187.035338
Nuclear repulsion energy116.808370
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 CID/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 3649 3396 0.90      
2 A 3546 3300 1.36      
3 A 3216 2992 0.05      
4 A 1799 1674 1.06      
5 A 1772 1649 19.40      
6 A 1406 1308 1.48      
7 A 1317 1226 0.31      
8 A 1060 986 1.20      
9 A 994 925 82.35      
10 A 715 666 281.17      
11 A 569 530 0.54      
12 A 324 302 0.27      
13 A 254 237 26.37      
14 B 3649 3396 1.09      
15 B 3543 3297 0.68      
16 B 3217 2993 43.89      
17 B 1778 1654 54.31      
18 B 1456 1355 1.89      
19 B 1190 1107 2.42      
20 B 1171 1089 50.93      
21 B 844 786 25.81      
22 B 643 599 458.57      
23 B 340 316 20.07      
24 B 198 184 182.17      

Unscaled Zero Point Vibrational Energy (zpe) 19325.4 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 17982.2 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 CID/3-21G*
ABC
1.44183 0.13032 0.12124

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.316 0.588 0.031
C2 -0.316 -0.588 0.031
N3 -0.316 1.865 -0.091
N4 0.316 -1.865 -0.091
H5 1.400 0.630 0.036
H6 -1.400 -0.630 0.036
H7 -1.326 1.827 -0.172
H8 1.326 -1.827 -0.172
H9 -0.012 2.552 0.590
H10 0.012 -2.552 0.590

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.33491.42992.45591.08542.10492.06702.62562.06823.2036
C21.33492.45591.42992.10491.08542.62562.06703.20362.0682
N31.42992.45593.78302.11802.72381.01394.04151.01364.4810
N42.45591.42993.78302.72382.11804.04151.01394.48101.0136
H51.08542.10492.11802.72383.07162.98472.46752.44833.5157
H62.10491.08542.72382.11803.07162.46752.98473.51572.4483
H72.06702.62561.01394.04152.98472.46754.51521.68244.6418
H82.62562.06704.04151.01392.46752.98474.51524.64181.6824
H92.06823.20361.01364.48102.44833.51571.68244.64185.1038
H103.20362.06824.48101.01363.51572.44834.64181.68245.1038

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.273 C1 C2 H6 120.496
C1 N3 H7 114.436 C1 N3 H9 114.563
C2 C1 N3 125.273 C2 C1 H5 120.496
C2 N4 H8 114.436 C2 N4 H10 114.563
N3 C1 H5 114.017 N4 C2 H6 114.017
H7 N3 H9 112.145 H8 N4 H10 112.145
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability