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All results from a given calculation for CH3PHCH3 (dimethylphosphine)

using model chemistry: MP2=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/3-21G
 hartrees
Energy at 0K-418.620567
Energy at 298.15K-418.628323
HF Energy-418.363308
Nuclear repulsion energy110.368293
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/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' 3189 3045 10.87      
2 A' 3185 3041 17.66      
3 A' 3096 2956 13.59      
4 A' 2233 2132 105.91      
5 A' 1580 1509 5.27      
6 A' 1577 1506 15.42      
7 A' 1431 1366 0.90      
8 A' 1065 1017 29.08      
9 A' 1021 975 39.04      
10 A' 736 702 4.55      
11 A' 628 600 0.97      
12 A' 251 240 0.25      
13 A' 183 175 0.06      
14 A" 3189 3045 2.08      
15 A" 3185 3041 3.06      
16 A" 3098 2958 13.05      
17 A" 1570 1499 12.94      
18 A" 1567 1496 0.54      
19 A" 1412 1348 0.85      
20 A" 1062 1014 27.46      
21 A" 900 860 0.94      
22 A" 754 720 0.93      
23 A" 675 644 7.57      
24 A" 178 170 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 18882.3 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 18028.8 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/3-21G
ABC
0.49740 0.22185 0.16926

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 -0.039 -0.696 0.000
H2 1.383 -0.962 0.000
C3 -0.039 0.556 1.460
C4 -0.039 0.556 -1.460
H5 -1.035 1.000 1.533
H6 -1.035 1.000 -1.533
H7 0.175 0.019 2.387
H8 0.175 0.019 -2.387
H9 0.702 1.346 1.315
H10 0.702 1.346 -1.315

Atom - Atom Distances (Å)
  P1 H2 C3 C4 H5 H6 H7 H8 H9 H10
P11.44681.92261.92262.49302.49302.50122.50122.53892.5389
H21.44682.54102.54103.47053.47052.84972.84972.74192.7419
C31.92262.54102.91941.09293.18471.09313.89041.09352.9785
C41.92262.54102.91943.18471.09293.89041.09312.97851.0935
H52.49303.47051.09293.18473.06501.77724.21821.78503.3533
H62.49303.47053.18471.09293.06504.21821.77723.35331.7850
H72.50122.84971.09313.89041.77724.21824.77491.78623.9680
H82.50122.84973.89041.09314.21821.77724.77493.96801.7862
H92.53892.74191.09352.97851.78503.35331.78623.96802.6292
H102.53892.74192.97851.09353.35331.78503.96801.78622.6292

picture of dimethylphosphine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
P1 C3 H5 108.371 P1 C3 H7 108.949
P1 C3 H9 111.690 P1 C4 H6 108.371
P1 C4 H8 108.949 P1 C4 H10 111.690
H2 P1 C3 96.885 H2 P1 C4 96.885
C3 P1 C4 98.795 H5 C3 H7 108.772
H5 C3 H9 109.454 H6 C4 H8 108.772
H6 C4 H10 109.454 H7 C3 H9 109.550
H8 C4 H10 109.550
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability