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Experimental data for As4 (Arsenic tetramer)

22 02 02 11 45
INChI INChIKey SMILES IUPAC name
InChI=1S/As4/c1-2-3(1)4(1)2/t1-,2+,3-,4+ UYVQXFOBKTWZCW-GNSDDBTRSA-N [As]12[As]3[As]1[As]23
State Conformation
1A1 Td
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference

Calculated vibrational frequencies for As4 (Arsenic tetramer).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment

Calculated rotational constants for As4 (Arsenic tetramer).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of Arsenic tetramer

Point Group Td


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rAsAs 2.435   1 2 1976Hellwege(II/7) ED

Cartesians
Atom x (Å) y (Å) z (Å)
As1 0.8609 0.8609 0.8609
As2 0.8609 -0.8609 -0.8609
As3 -0.8609 0.8609 -0.8609
As4 -0.8609 -0.8609 0.8609

Atom - Atom Distances bond lengths
Distances in Å
  As1 As2 As3 As4
As1   2.43502.43502.4350
As2 2.4350   2.43502.4350
As3 2.43502.4350   2.4350
As4 2.43502.43502.4350  

Calculated geometries for As4 (Arsenic tetramer).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
As1 As2 As3 60.000 As1 As2 As4 60.000
As1 As3 As2 60.000 As1 As3 As4 60.000
As1 As4 As2 60.000 As1 As4 As3 60.000
As2 As1 As3 60.000 As2 As1 As4 60.000
As2 As3 As4 60.000 As2 As4 As3 60.000
As3 As1 As4 60.000 As3 As2 As4 60.000

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
As-As 6

Connectivity
Atom 1 Atom 2
As1 As2
As1 As3
As1 As4
As2 As3
As2 As4
As3 As4
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A1

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
9.300 0.300     webbook
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 1A1 Td True           Td 0 0
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for As4 (Arsenic tetramer).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 1A1 Td True       Td 0 0

Calculated electric quadrupole moments for As4 (Arsenic tetramer).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
17.293 0.163 2015Tha/Wu:144302

Calculated electric dipole polarizability for As4 (Arsenic tetramer).

References
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squib reference DOI
1976Hellwege(II/7) Hellwege, KH and AM Hellwege (ed.). Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 7: Structure Data of Free Polyatomic Molecules. Springer-Verlag. Berlin. 1976.  
2015Tha/Wu:144302 AJ Thakkar, T Wu "How well do static electronic dipole polarizabilities from gas-phase experiments compare with density functional and MP2 computations?" J. Chem. Phys. 143, 144302 (2015) 10.1063/1.4932594
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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