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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP2=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 MP2=FULL/cc-pVTZ
 hartrees
Energy at 0K-150.964686
Energy at 298.15K-150.972738
HF Energy-150.305893
Counterpoise corrected energy-150.964686
CP Energy at 298.15K-150.972738
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.681638
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 MP2=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 3546 3366 0.05      
2 A1 3124 2966 32.33      
3 A1 1672 1587 42.52      
4 A1 1517 1441 0.05      
5 A1 1123 1066 34.44      
6 A1 870 826 1.13      
7 A1 464 441 3.90      
8 A2 3643 3459 0.00      
9 A2 1418 1347 0.00      
10 A2 1083 1028 0.00      
11 A2 270 256 0.00      
12 B1 3640 3455 3.71      
13 B1 3159 2999 20.56      
14 B1 1383 1313 0.61      
15 B1 859 816 0.56      
16 B1 405 384 85.20      
17 B2 3547 3367 2.46      
18 B2 1659 1576 4.30      
19 B2 1402 1331 17.63      
20 B2 1120 1064 72.47      
21 B2 803 763 407.83      

Unscaled Zero Point Vibrational Energy (zpe) 18353.4 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 17424.8 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 MP2=FULL/cc-pVTZ
ABC
1.19395 0.30704 0.27790

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.552
N2 0.000 1.252 -0.183
N3 0.000 -1.252 -0.183
H4 0.872 0.000 1.196
H5 -0.872 0.000 1.196
H6 0.810 1.303 -0.784
H7 -0.810 1.303 -0.784
H8 -0.810 -1.303 -0.784
H9 0.810 -1.303 -0.784

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45141.45141.08421.08422.03422.03422.03422.0342
N21.45142.50332.05652.05651.01001.01002.74672.7467
N31.45142.50332.05652.05652.74672.74671.01001.0100
H41.08422.05652.05651.74392.37092.90652.90652.3709
H51.08422.05652.05651.74392.90652.37092.37092.9065
H62.03421.01002.74672.37092.90651.62093.06932.6063
H72.03421.01002.74672.90652.37091.62092.60633.0693
H82.03422.74671.01002.90652.37093.06932.60631.6209
H92.03422.74671.01002.37092.90652.60633.06931.6209

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.179 C1 N2 H7 110.179
C1 N3 H8 110.179 C1 N3 H9 110.179
N2 C1 N3 119.168 N2 C1 H4 107.513
N2 C1 H5 107.513 N3 C1 H4 107.513
N3 C1 H5 107.513 H4 C1 H5 107.064
H6 N2 H7 106.731 H8 N3 H9 106.731
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability