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All results from a given calculation for CH3PHCH3 (dimethylphosphine)

using model chemistry: QCISD/6-311G*

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/6-311G*
 hartrees
Energy at 0K-421.000962
Energy at 298.15K-421.008759
HF Energy-420.559742
Nuclear repulsion energy112.874464
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/6-311G*
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' 3123 2990 16.95      
2 A' 3119 2987 30.15      
3 A' 3037 2908 20.24      
4 A' 2330 2231 101.02      
5 A' 1511 1447 5.01      
6 A' 1509 1445 15.00      
7 A' 1396 1336 2.14      
8 A' 1044 999 46.10      
9 A' 1002 959 39.30      
10 A' 736 704 3.25      
11 A' 683 654 3.04      
12 A' 269 258 0.59      
13 A' 191 182 0.19      
14 A" 3123 2990 9.38      
15 A" 3120 2987 0.03      
16 A" 3038 2909 21.23      
17 A" 1501 1437 11.01      
18 A" 1495 1431 1.02      
19 A" 1377 1319 4.70      
20 A" 1049 1004 30.66      
21 A" 865 828 0.75      
22 A" 739 708 4.76      
23 A" 726 695 11.31      
24 A" 174 167 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 18577.4 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 17786.0 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/6-311G*
ABC
0.52880 0.23255 0.17885

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 -0.038 -0.670 0.000
H2 1.364 -0.937 0.000
C3 -0.038 0.530 1.418
C4 -0.038 0.530 -1.418
H5 -1.029 0.991 1.505
H6 -1.029 0.991 -1.505
H7 0.157 -0.003 2.355
H8 0.157 -0.003 -2.355
H9 0.706 1.326 1.308
H10 0.706 1.326 -1.308

Atom - Atom Distances (Å)
  P1 H2 C3 C4 H5 H6 H7 H8 H9 H10
P11.42751.85751.85752.45002.45002.45522.45522.49962.4996
H21.42752.47592.47593.42143.42142.80592.80592.69532.6953
C31.85752.47592.83571.09573.11991.09543.81501.09542.9354
C41.85752.47592.83573.11991.09573.81501.09542.93541.0954
H52.45003.42141.09573.11993.00921.76544.15781.77793.3213
H62.45003.42143.11991.09573.00924.15781.76543.32131.7779
H72.45522.80591.09543.81501.76544.15784.70931.77843.9344
H82.45522.80593.81501.09544.15781.76544.70933.93441.7784
H92.49962.69531.09542.93541.77793.32131.77843.93442.6154
H102.49962.69532.93541.09543.32131.77793.93441.77842.6154

picture of dimethylphosphine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
P1 C3 H5 109.396 P1 C3 H7 109.787
P1 C3 H9 113.115 P1 C4 H6 109.396
P1 C4 H8 109.787 P1 C4 H10 113.115
H2 P1 C3 96.951 H2 P1 C4 96.951
C3 P1 C4 99.513 H5 C3 H7 107.363
H5 C3 H9 108.469 H6 C4 H8 107.363
H6 C4 H10 108.469 H7 C3 H9 108.539
H8 C4 H10 108.539
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability