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All results from a given calculation for CH3PHCH3 (dimethylphosphine)

using model chemistry: MP2/6-31G(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 MP2/6-31G(2df,p)
 hartrees
Energy at 0K-421.029937
Energy at 298.15K-421.037763
HF Energy-420.548007
Nuclear repulsion energy113.435218
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 MP2/6-31G(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' 3214 3036 6.40      
2 A' 3210 3032 8.59      
3 A' 3106 2934 7.94      
4 A' 2473 2336 70.07      
5 A' 1509 1425 11.21      
6 A' 1508 1424 1.00      
7 A' 1355 1280 1.11      
8 A' 1033 976 31.91      
9 A' 984 929 30.34      
10 A' 739 698 1.20      
11 A' 688 650 1.70      
12 A' 263 248 0.12      
13 A' 201 190 0.17      
14 A" 3215 3037 1.36      
15 A" 3211 3033 0.54      
16 A" 3109 2937 6.95      
17 A" 1499 1416 6.04      
18 A" 1493 1410 2.83      
19 A" 1338 1264 0.68      
20 A" 1050 992 26.09      
21 A" 847 800 1.22      
22 A" 747 705 9.70      
23 A" 723 683 4.72      
24 A" 192 181 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 18853.2 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 17806.8 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 MP2/6-31G(2df,p)
ABC
0.53146 0.23555 0.18069

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 -0.037 -0.668 0.000
H2 1.349 -0.943 0.000
C3 -0.037 0.530 1.410
C4 -0.037 0.530 -1.410
H5 -1.024 0.991 1.477
H6 -1.024 0.991 -1.477
H7 0.144 -0.002 2.344
H8 0.144 -0.002 -2.344
H9 0.710 1.316 1.297
H10 0.710 1.316 -1.297

Atom - Atom Distances (Å)
  P1 H2 C3 C4 H5 H6 H7 H8 H9 H10
P11.41331.85051.85052.43072.43072.44362.44362.48552.4855
H21.41332.46602.46603.39913.39912.79882.79882.68222.6822
C31.85052.46602.81981.09093.08561.09053.79591.09032.9158
C41.85052.46602.81983.08561.09093.79591.09052.91581.0903
H52.43073.39911.09093.08562.95441.76104.11721.77353.2875
H62.43073.39913.08561.09092.95444.11721.76103.28751.7735
H72.44362.79881.09053.79591.76104.11724.68821.77643.9134
H82.44362.79883.79591.09054.11721.76104.68823.91341.7764
H92.48552.68221.09032.91581.77353.28751.77643.91342.5936
H102.48552.68222.91581.09033.28751.77353.91341.77642.5936

picture of dimethylphosphine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
P1 C3 H5 108.688 P1 C3 H7 109.652
P1 C3 H9 112.812 P1 C4 H6 108.688
P1 C4 H8 109.652 P1 C4 H10 112.812
H2 P1 C3 97.240 H2 P1 C4 97.240
C3 P1 C4 99.261 H5 C3 H7 107.663
H5 C3 H9 108.796 H6 C4 H8 107.663
H6 C4 H10 108.796 H7 C3 H9 109.095
H8 C4 H10 109.095
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability