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All results from a given calculation for CH3PHCH3 (dimethylphosphine)

using model chemistry: CID/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 CID/3-21G
 hartrees
Energy at 0K-418.622433
Energy at 298.15K-418.630209
HF Energy-418.363511
Nuclear repulsion energy110.509598
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 CID/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' 3196 2978 10.82      
2 A' 3193 2975 21.14      
3 A' 3112 2899 15.61      
4 A' 2239 2086 105.96      
5 A' 1586 1478 7.17      
6 A' 1584 1475 15.31      
7 A' 1442 1344 1.17      
8 A' 1073 1000 29.30      
9 A' 1033 962 38.74      
10 A' 742 692 4.72      
11 A' 637 594 0.84      
12 A' 255 238 0.27      
13 A' 181 168 0.06      
14 A" 3196 2977 4.34      
15 A" 3193 2975 2.13      
16 A" 3111 2898 16.56      
17 A" 1577 1469 13.09      
18 A" 1573 1466 0.34      
19 A" 1424 1326 1.18      
20 A" 1073 1000 26.96      
21 A" 909 847 0.80      
22 A" 766 713 0.90      
23 A" 684 637 7.01      
24 A" 174 162 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 18976.6 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 17678.6 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 CID/3-21G
ABC
0.50035 0.22198 0.16962

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 -0.039 -0.693 0.000
H2 1.380 -0.964 0.000
C3 -0.039 0.553 1.459
C4 -0.039 0.553 -1.459
H5 -1.032 1.002 1.533
H6 -1.032 1.002 -1.533
H7 0.171 0.016 2.386
H8 0.171 0.016 -2.386
H9 0.704 1.341 1.317
H10 0.704 1.341 -1.317

Atom - Atom Distances (Å)
  P1 H2 C3 C4 H5 H6 H7 H8 H9 H10
P11.44541.91921.91922.49142.49142.49812.49812.53472.5347
H21.44542.53942.53943.46923.46922.84872.84872.73982.7398
C31.91922.53942.91861.09193.18431.09183.88841.09222.9802
C41.91922.53942.91863.18431.09193.88841.09182.98021.0922
H52.49143.46921.09193.18433.06561.77454.21641.78223.3544
H62.49143.46923.18431.09193.06564.21641.77453.35441.7822
H72.49812.84871.09183.88841.77454.21644.77211.78363.9689
H82.49812.84873.88841.09184.21641.77454.77213.96891.7836
H92.53472.73981.09222.98021.78223.35441.78363.96892.6343
H102.53472.73982.98021.09223.35441.78223.96891.78362.6343

picture of dimethylphosphine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
P1 C3 H5 108.526 P1 C3 H7 109.009
P1 C3 H9 111.676 P1 C4 H6 108.526
P1 C4 H8 109.009 P1 C4 H10 111.676
H2 P1 C3 97.001 H2 P1 C4 97.001
C3 P1 C4 98.995 H5 C3 H7 108.698
H5 C3 H9 109.374 H6 C4 H8 108.698
H6 C4 H10 109.374 H7 C3 H9 109.503
H8 C4 H10 109.503
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability