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All results from a given calculation for CH3PHCH3 (dimethylphosphine)

using model chemistry: MP2/CEP-121G

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-121G
 hartrees
Energy at 0K-21.572425
Energy at 298.15K-21.579994
HF Energy-21.327189
Nuclear repulsion energy43.014136
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-121G
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' 3101 3026 27.72      
2 A' 3091 3017 44.00      
3 A' 2974 2903 31.13      
4 A' 2244 2190 134.39      
5 A' 1493 1458 3.22      
6 A' 1486 1450 18.41      
7 A' 1394 1360 1.05      
8 A' 1032 1007 24.29      
9 A' 994 970 45.46      
10 A' 694 678 5.17      
11 A' 624 609 2.63      
12 A' 239 233 0.40      
13 A' 161 157 0.15      
14 A" 3100 3026 9.53      
15 A" 3091 3017 5.81      
16 A" 2976 2904 35.94      
17 A" 1481 1445 10.63      
18 A" 1473 1437 1.14      
19 A" 1374 1341 1.51      
20 A" 1020 995 27.37      
21 A" 869 848 0.15      
22 A" 703 686 0.22      
23 A" 677 661 12.90      
24 A" 128 125 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 18208.3 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 17771.3 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-121G
ABC
0.49506 0.21777 0.16685

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 -0.040 -0.695 0.000
H2 1.396 -0.980 0.000
C3 -0.040 0.555 1.472
C4 -0.040 0.555 -1.472
H5 -1.038 1.015 1.546
H6 -1.038 1.015 -1.546
H7 0.161 0.013 2.409
H8 0.161 0.013 -2.409
H9 0.716 1.347 1.345
H10 0.716 1.347 -1.345

Atom - Atom Distances (Å)
  P1 H2 C3 C4 H5 H6 H7 H8 H9 H10
P11.46351.93181.93182.51242.51242.51922.51922.55992.5599
H21.46352.56622.56623.50603.50602.88372.88372.77242.7724
C31.93182.56622.94471.10133.21221.10123.92461.10213.0230
C41.93182.56622.94473.21221.10133.92461.10123.02301.1021
H52.51243.50601.10133.21223.09211.78504.25281.79623.3981
H62.51243.50603.21221.10133.09214.25281.78503.39811.7962
H72.51922.88371.10123.92461.78504.25284.81881.79494.0235
H82.51922.88373.92461.10124.25281.78504.81884.02351.7949
H92.55992.77241.10213.02301.79623.39811.79494.02352.6909
H102.55992.77243.02301.10213.39811.79624.02351.79492.6909

picture of dimethylphosphine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
P1 C3 H5 108.751 P1 C3 H7 109.241
P1 C3 H9 112.169 P1 C4 H6 108.751
P1 C4 H8 109.241 P1 C4 H10 112.169
H2 P1 C3 97.229 H2 P1 C4 97.229
C3 P1 C4 99.312 H5 C3 H7 108.286
H5 C3 H9 109.215 H6 C4 H8 108.286
H6 C4 H10 109.215 H7 C3 H9 109.102
H8 C4 H10 109.102
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability