Original Paper

Journal of Chemical Crystallography

, Volume 39, Issue 5, pp 364-367

First online:

Crystal and Molecular Structure of Dichloro(ethylenediamine)gold(III) Nitrate: [Au(NH2CH2CH2NH2)Cl2]NO3

  • D. Michelle MotleyAffiliated withDepartment of Chemistry, The University of Texas at San Antonio
  • , Judith A. WalmsleyAffiliated withDepartment of Chemistry, The University of Texas at San Antonio Email author 
  • , Julio Zukerman-SchpectorAffiliated withDepartment of Chemistry, Universidade Federal de São Carlos
  • , Edward R. T. TiekinkAffiliated withDepartment of Chemistry, The University of Texas at San Antonio Email author 

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Abstract

The gold(III) atom in [Au(NH2CH2CH2NH2)Cl2]NO3 is chelated by the ethylenediamine (en) ligand and the approximately square planar geometry is completed by two chloride atoms. Weak Au···O and Au···Cl contacts are noted above and below the square plane leading to a tetragonally distorted octahedron for the gold(III) center. Extensive charge-assisted hydrogen bonding of the type N–H···O leads to the formation of a 2-D array and layers are consolidated into a 3-D network via C–H···O and C–H···Cl contacts. The compound crystallizes in the orthorhombic space group Pbca with a = 10.3380(11) Å, b = 8.2105(7) Å, c = 19.625(2) Å, and Z = 8.

Index Abstract

Square planar complex cations form additional Au···O and Au···Cl interactions to form a tetragonally distorted octahedron for gold. The ionic components are connected into a 2-D array via charge-assisted N–H···O hydrogen bonding interactions.
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Keywords

Gold Ethylenediamine Hydrogen bonding Charge-assisted hydrogen bonding