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All results from a given calculation for As(CH3)3 (trimethyl arsine)

using model chemistry: MP2/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/LANL2DZ
 hartrees
Energy at 0K-125.071033
Energy at 298.15K 
Nuclear repulsion energy101.073670
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/LANL2DZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3133 3017 51.97      
2 A1 3016 2905 22.61      
3 A1 1508 1452 12.16      
4 A1 1392 1341 7.35      
5 A1 963 927 49.01      
6 A1 560 539 2.89      
7 A1 238 229 0.80      
8 A2 3136 3020 0.00      
9 A2 1486 1431 0.00      
10 A2 801 771 0.00      
11 A2 81i 78i 0.00      
12 E 3136 3020 25.07      
12 E 3136 3020 25.07      
13 E 3132 3016 7.69      
13 E 3132 3016 7.69      
14 E 3019 2908 35.97      
14 E 3019 2908 35.97      
15 E 1503 1448 11.75      
15 E 1503 1448 11.75      
16 E 1490 1435 7.84      
16 E 1490 1435 7.84      
17 E 1363 1313 7.22      
17 E 1363 1313 7.22      
18 E 957 921 21.08      
18 E 957 921 21.08      
19 E 852 820 1.31      
19 E 852 820 1.31      
20 E 585 564 15.88      
20 E 585 564 15.88      
21 E 214 206 0.28      
21 E 214 206 0.28      
22 E 140 135 0.02      
22 E 140 135 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 24464.7 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 23562.0 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 MP2/LANL2DZ
ABC
0.15064 0.15064 0.11017

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
As1 0.000 0.000 0.487
C2 0.000 1.734 -0.533
C3 1.501 -0.867 -0.533
C4 -1.501 -0.867 -0.533
H5 0.000 1.555 -1.624
H6 1.347 -0.777 -1.624
H7 -1.347 -0.777 -1.624
H8 -0.895 2.324 -0.265
H9 2.460 -0.387 -0.265
H10 -1.565 -1.937 -0.265
H11 0.895 2.324 -0.265
H12 1.565 -1.937 -0.265
H13 -2.460 -0.387 -0.265

Atom - Atom Distances (Å)
  As1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
As12.01132.01132.01132.62142.62142.62142.60102.60102.60102.60102.60102.6010
C22.01133.00293.00291.10543.05113.05111.10483.25853.99921.10483.99923.2585
C32.01133.00293.00293.05111.10543.05113.99921.10483.25853.25851.10483.9992
C42.01133.00293.00293.05113.05111.10543.25853.99921.10483.99923.25851.1048
H52.62141.10543.05113.05112.69302.69301.79943.41544.06031.79944.06033.4154
H62.62143.05111.10543.05112.69302.69304.06031.79943.41543.41541.79944.0603
H72.62143.05113.05111.10542.69302.69303.41544.06031.79944.06033.41541.7994
H82.60101.10483.99923.25851.79944.06033.41544.31284.31281.79024.91953.1294
H92.60103.25851.10483.99923.41541.79944.06034.31284.31283.12941.79024.9195
H102.60103.99923.25851.10484.06033.41541.79944.31284.31284.91953.12941.7902
H112.60101.10483.25853.99921.79943.41544.06031.79023.12944.91954.31284.3128
H122.60103.99921.10483.25854.06031.79943.41544.91951.79023.12944.31284.3128
H132.60103.25853.99921.10483.41544.06031.79943.12944.91951.79024.31284.3128

picture of trimethyl arsine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
As1 C2 H5 111.145 As1 C2 H8 109.714
As1 C2 H11 109.714 As1 C3 H6 111.145
As1 C3 H9 109.714 As1 C3 H12 109.714
As1 C4 H7 111.145 As1 C4 H10 109.714
As1 C4 H13 109.714 C2 As1 C3 96.577
C2 As1 C4 96.577 C3 As1 C4 96.577
H5 C2 H8 108.995 H5 C2 H11 108.995
H6 C3 H9 108.994 H6 C3 H12 108.995
H7 C4 H10 108.995 H7 C4 H13 108.994
H8 C2 H11 108.221 H9 C3 H12 108.221
H10 C4 H13 108.221
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability