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All results from a given calculation for CH3PHCH3 (dimethylphosphine)

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-418.804078
Energy at 298.15K-418.811947
HF Energy-418.468644
Nuclear repulsion energy112.414290
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 QCISD/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' 3089 2969 18.08      
2 A' 3086 2966 26.66      
3 A' 3014 2897 15.48      
4 A' 2422 2328 84.04      
5 A' 1560 1500 2.57      
6 A' 1558 1498 14.79      
7 A' 1430 1374 2.20      
8 A' 1076 1034 33.82      
9 A' 1030 990 33.51      
10 A' 760 730 2.03      
11 A' 670 644 1.99      
12 A' 271 260 0.20      
13 A' 194 187 0.12      
14 A" 3089 2969 8.53      
15 A" 3085 2965 0.24      
16 A" 3016 2898 17.22      
17 A" 1552 1492 9.21      
18 A" 1547 1487 1.81      
19 A" 1415 1360 3.35      
20 A" 1082 1040 27.09      
21 A" 899 864 1.58      
22 A" 773 743 0.08      
23 A" 717 689 13.15      
24 A" 191 184 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 18762.9 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 18033.0 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 QCISD/3-21G*
ABC
0.52376 0.23066 0.17725

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 -0.039 -0.674 0.000
H2 1.360 -0.930 0.000
C3 -0.039 0.533 1.425
C4 -0.039 0.533 -1.425
H5 -1.035 0.992 1.510
H6 -1.035 0.992 -1.510
H7 0.169 -0.002 2.363
H8 0.169 -0.002 -2.363
H9 0.707 1.332 1.299
H10 0.707 1.332 -1.299

Atom - Atom Distances (Å)
  P1 H2 C3 C4 H5 H6 H7 H8 H9 H10
P11.42151.86791.86792.45982.45982.46592.46592.50412.5041
H21.42152.47542.47543.42223.42222.80452.80452.68972.6897
C31.86792.47542.85021.10033.13371.10003.83171.09982.9355
C41.86792.47542.85023.13371.10033.83171.10002.93551.0998
H52.45983.42221.10033.13373.02071.77924.17661.78713.3233
H62.45983.42223.13371.10033.02074.17661.77923.32331.7871
H72.46592.80451.10003.83171.77924.17664.72681.78933.9352
H82.46592.80453.83171.10004.17661.77924.72683.93521.7893
H92.50412.68971.09982.93551.78713.32331.78933.93522.5989
H102.50412.68972.93551.09983.32331.78713.93521.78932.5989

picture of dimethylphosphine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
P1 C3 H5 109.188 P1 C3 H7 109.647
P1 C3 H9 112.490 P1 C4 H6 109.188
P1 C4 H8 109.647 P1 C4 H10 112.490
H2 P1 C3 96.686 H2 P1 C4 96.686
C3 P1 C4 99.450 H5 C3 H7 107.922
H5 C3 H9 108.631 H6 C4 H8 107.922
H6 C4 H10 108.631 H7 C3 H9 108.853
H8 C4 H10 108.853
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability