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

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-2344.431931
Energy at 298.15K-2344.439103
Nuclear repulsion energy289.070878
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 B3PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3145 3017 26.17      
2 A1 3046 2923 12.58      
3 A1 1547 1484 11.14      
4 A1 1351 1296 7.39      
5 A1 931 893 50.31      
6 A1 587 563 1.83      
7 A1 238 229 0.37      
8 A2 3141 3013 0.00      
9 A2 1511 1450 0.00      
10 A2 786 754 0.00      
11 A2 150 144 0.00      
12 E 3143 3015 5.47      
12 E 3143 3015 5.46      
13 E 3142 3014 12.12      
13 E 3142 3014 12.12      
14 E 3048 2924 14.77      
14 E 3048 2924 14.78      
15 E 1529 1467 14.45      
15 E 1529 1467 14.45      
16 E 1525 1463 3.26      
16 E 1525 1463 3.26      
17 E 1327 1273 5.48      
17 E 1327 1273 5.48      
18 E 934 896 21.10      
18 E 934 896 21.10      
19 E 811 778 2.52      
19 E 811 778 2.51      
20 E 609 584 14.00      
20 E 609 584 14.01      
21 E 221 212 0.06      
21 E 221 212 0.06      
22 E 180 173 0.01      
22 E 180 173 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 24684.5 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 23682.3 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 B3PW91/3-21G*
ABC
0.15476 0.15476 0.11480

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
As1 0.000 0.000 0.488
C2 0.000 1.698 -0.536
C3 1.471 -0.849 -0.536
C4 -1.471 -0.849 -0.536
H5 0.000 1.501 -1.614
H6 1.300 -0.750 -1.614
H7 -1.300 -0.750 -1.614
H8 -0.890 2.278 -0.266
H9 2.418 -0.368 -0.266
H10 -1.528 -1.910 -0.266
H11 0.890 2.278 -0.266
H12 1.528 -1.910 -0.266
H13 -2.418 -0.368 -0.266

Atom - Atom Distances (Å)
  As1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
As11.98321.98321.98322.58232.58232.58232.55942.55942.55942.55942.55942.5594
C21.98322.94192.94191.09562.97442.97441.09603.19223.92781.09603.92783.1922
C31.98322.94192.94192.97441.09562.97443.92781.09603.19223.19221.09603.9278
C41.98322.94192.94192.97442.97441.09563.19223.92781.09603.92783.19221.0960
H52.58231.09562.97442.97442.59942.59941.79223.33983.97271.79223.97273.3398
H62.58232.97441.09562.97442.59942.59943.97271.79223.33983.33981.79223.9727
H72.58232.97442.97441.09562.59942.59943.33983.97271.79223.97273.33981.7922
H82.55941.09603.92783.19221.79223.97273.33984.23634.23631.78034.83593.0556
H92.55943.19221.09603.92783.33981.79223.97274.23634.23633.05561.78034.8359
H102.55943.92783.19221.09603.97273.33981.79224.23634.23634.83593.05561.7803
H112.55941.09603.19223.92781.79223.33983.97271.78033.05564.83594.23634.2363
H122.55943.92781.09603.19223.97271.79223.33984.83591.78033.05564.23634.2363
H132.55943.19223.92781.09603.33983.97271.79223.05564.83591.78034.23634.2363

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 110.682 As1 C2 H8 109.016
As1 C2 H11 109.016 As1 C3 H6 110.682
As1 C3 H9 109.016 As1 C3 H12 109.016
As1 C4 H7 110.682 As1 C4 H10 109.016
As1 C4 H13 109.016 C2 As1 C3 95.753
C2 As1 C4 95.753 C3 As1 C4 95.753
H5 C2 H8 109.730 H5 C2 H11 109.730
H6 C3 H9 109.730 H6 C3 H12 109.730
H7 C4 H10 109.730 H7 C4 H13 109.730
H8 C2 H11 108.629 H9 C3 H12 108.629
H10 C4 H13 108.629
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 As 0.501      
2 C -0.798      
3 C -0.798      
4 C -0.798      
5 H 0.208      
6 H 0.208      
7 H 0.208      
8 H 0.212      
9 H 0.212      
10 H 0.212      
11 H 0.212      
12 H 0.212      
13 H 0.212      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.099 1.099
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.887 0.000 0.000
y 0.000 -37.887 0.000
z 0.000 0.000 -41.070
Traceless
 xyz
x 1.592 0.000 0.000
y 0.000 1.592 0.000
z 0.000 0.000 -3.183
Polar
3z2-r2-6.367
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.860 0.000 0.000
y 0.000 8.860 0.000
z 0.000 0.000 7.331


<r2> (average value of r2) Å2
<r2> 140.163
(<r2>)1/2 11.839