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All results from a given calculation for CH3PHCH3 (dimethylphosphine)

using model chemistry: MP2=FULL/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-421.068811
Energy at 298.15K-421.076679
HF Energy-420.547964
Nuclear repulsion energy113.837156
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/6-31G(2df,p)
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' 3220 3027 7.24      
2 A' 3218 3024 7.41      
3 A' 3114 2927 7.81      
4 A' 2481 2332 69.97      
5 A' 1520 1428 8.20      
6 A' 1519 1427 4.51      
7 A' 1358 1277 1.35      
8 A' 1038 975 32.52      
9 A' 987 927 31.34      
10 A' 744 699 1.11      
11 A' 700 658 1.62      
12 A' 267 251 0.12      
13 A' 203 191 0.18      
14 A" 3222 3028 0.95      
15 A" 3219 3025 0.90      
16 A" 3118 2930 6.95      
17 A" 1510 1420 7.21      
18 A" 1506 1415 2.07      
19 A" 1342 1261 0.89      
20 A" 1059 995 26.17      
21 A" 851 800 1.34      
22 A" 758 713 11.77      
23 A" 728 685 2.99      
24 A" 202 190 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 18941.0 cm-1
Scaled (by 0.9399) Zero Point Vibrational Energy (zpe) 17802.7 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/6-31G(2df,p)
ABC
0.53366 0.23792 0.18226

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 -0.037 -0.668 0.000
H2 1.348 -0.938 0.000
C3 -0.037 0.528 1.402
C4 -0.037 0.528 -1.402
H5 -1.021 0.990 1.470
H6 -1.021 0.990 -1.470
H7 0.142 0.002 2.337
H8 0.142 0.002 -2.337
H9 0.708 1.314 1.291
H10 0.708 1.314 -1.291

Atom - Atom Distances (Å)
  P1 H2 C3 C4 H5 H6 H7 H8 H9 H10
P11.41131.84241.84242.42432.42432.43792.43792.47962.4796
H21.41132.45622.45623.38993.38992.79302.79302.67332.6733
C31.84242.45622.80321.08903.07051.08873.78031.08842.9024
C41.84242.45622.80323.07051.08903.78031.08872.90241.0884
H52.42433.38991.08903.07052.94011.75574.10211.76813.2739
H62.42433.38993.07051.08902.94014.10211.75573.27391.7681
H72.43792.79301.08873.78031.75574.10214.67491.77123.9000
H82.43792.79303.78031.08874.10211.75574.67493.90001.7712
H92.47962.67331.08842.90241.76813.27391.77123.90002.5824
H102.47962.67332.90241.08843.27391.76813.90001.77122.5824

picture of dimethylphosphine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
P1 C3 H5 108.854 P1 C3 H7 109.870
P1 C3 H9 113.032 P1 C4 H6 108.854
P1 C4 H8 109.870 P1 C4 H10 113.032
H2 P1 C3 97.141 H2 P1 C4 97.141
C3 P1 C4 99.059 H5 C3 H7 107.447
H5 C3 H9 108.589 H6 C4 H8 107.447
H6 C4 H10 108.589 H7 C3 H9 108.890
H8 C4 H10 108.890
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability