Synthesis, Characterization and Crystal Structure Determination of a New Complex Containing Ni(II) and Au(III) with 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz) Ligand

Document Type : Original Article

Authors

1 School of Chemistry- Damghan University-Damghan-Iran

2 School of Chemistry-Damghan University-Damghan Iran.

3 Department of Chemistry, Farhangian University, Tehran, Iran

4 Faculty of Chemistry-Shahid Beheshti University-Tehran -Iran

Abstract

Synthesis, Characterization and Crystal Structure Determination of a New Complex Containing Ni(II) and Au(III) with 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz) Ligand
Robabeh Alizadeh1*, Sedighe Kargolpar1, Vahid Amani2, Hamid Reza Khavasi3
1School of Chemistry-Damghan University-Damghan Iran.
2Department of Chemistry, Farhangian University, Tehran, Iran
3Faculty of Chemistry-Shahid Beheshti University-Tehran –Iran

New complex [Ni(tppz)2][AuCl4]2n (1) was synthesized from the reaction of HAuCl4.3H2O) in acetonitrile) and Ni(II) chloride (in DMF) with 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz) (in DMF) and characterized by elemental analysis, UV-Vis, IR and NMR spectral methods. Furthermore, the crystal structure of Complex 1 was determined by single crystal X-ray diffraction. According to crystal structure analysis the complex was crystallized in space group Pcnb of the orthorhombic system and unit cell dimensions are a = 9.7926(6) Å, b = 18.071(1) Å, c = 29.249(2) Å, α = β = γ = 90 º. Complex 1 contains cationic and anionic parts. The coordination number of Ni and Au atoms in cationic and anionic parts are six and four, respectively. The Ni and Au atoms have distorted octahedral and tetrahedral geometry, respectively. The crystal structure of 1 was stabilized by C-H…Cl and C-H…N hydrogen bonding and C-H…π and Au-Cl…π interactions.

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References

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Applied Chemistry Today
Volume 14, Issue 50
April 2019
Pages 249-260

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