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All results from a given calculation for CH3PHCH3 (dimethylphosphine)

using model chemistry: MP2/CEP-31G*

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/CEP-31G*
 hartrees
Energy at 0K-21.750828
Energy at 298.15K-21.758587
HF Energy-21.394661
Nuclear repulsion energy43.707968
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/CEP-31G*
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' 3199 3037 21.63      
2 A' 3195 3034 39.06      
3 A' 3086 2930 21.08      
4 A' 2407 2285 108.00      
5 A' 1509 1433 4.50      
6 A' 1509 1432 15.55      
7 A' 1372 1303 1.48      
8 A' 1039 987 41.43      
9 A' 992 942 37.48      
10 A' 739 701 2.96      
11 A' 681 647 1.20      
12 A' 260 247 0.27      
13 A' 195 185 0.17      
14 A" 3199 3037 6.86      
15 A" 3197 3035 3.21      
16 A" 3089 2932 25.08      
17 A" 1501 1426 8.30      
18 A" 1496 1420 2.71      
19 A" 1355 1286 1.79      
20 A" 1047 994 24.14      
21 A" 855 812 0.87      
22 A" 744 707 3.50      
23 A" 726 689 8.01      
24 A" 171 163 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 18780.6 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 17830.3 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/CEP-31G*
ABC
0.51418 0.22920 0.17560

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 -0.039 -0.681 0.000
H2 1.378 -0.939 0.000
C3 -0.039 0.540 1.430
C4 -0.039 0.540 -1.430
H5 -1.040 0.998 1.502
H6 -1.040 0.998 -1.502
H7 0.157 -0.002 2.371
H8 0.157 -0.002 -2.371
H9 0.714 1.338 1.305
H10 0.714 1.338 -1.305

Atom - Atom Distances (Å)
  P1 H2 C3 C4 H5 H6 H7 H8 H9 H10
P11.43941.88021.88022.46532.46532.47392.47392.51852.5185
H21.43942.49752.49753.44283.44282.82622.82622.70662.7066
C31.88022.49752.85991.10373.13191.10353.84431.10362.9464
C41.88022.49752.85993.13191.10373.84431.10352.94641.1036
H52.46533.44281.10373.13193.00391.78594.17531.79753.3272
H62.46533.44283.13191.10373.00394.17531.78593.32721.7975
H72.47392.82621.10353.84431.78594.17534.74181.80033.9517
H82.47392.82623.84431.10354.17531.78594.74183.95171.8003
H92.51852.70661.10362.94641.79753.32721.80033.95172.6097
H102.51852.70662.94641.10363.32721.79753.95171.80032.6097

picture of dimethylphosphine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
P1 C3 H5 108.608 P1 C3 H7 109.233
P1 C3 H9 112.523 P1 C4 H6 108.608
P1 C4 H8 109.233 P1 C4 H10 112.523
H2 P1 C3 96.685 H2 P1 C4 96.685
C3 P1 C4 99.019 H5 C3 H7 108.020
H5 C3 H9 109.042 H6 C4 H8 108.020
H6 C4 H10 109.042 H7 C3 H9 109.311
H8 C4 H10 109.311
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability