Synthesis and characterisation of some metal complexes of hybrid phosphorus-nitrogenligands: the crystal structure of 1-(diphenylphosphino)-2-(2-pyridyl)ethane cobalt(II) chloride

  • Peter T. Ndifon Department of Inorganic Chemistry, Faculty of Science, University of Yaoundé I, P.O. Box 812 Yaoundé, Cameroon
  • Moise O. Agwara Department of Inorganic Chemistry, Faculty of Science, University of Yaoundé I, P.O. Box 812 Yaoundé, Cameroon
  • Yoshihito Hayashi Department of Chemistry, University of Kanazawa, Ishikawa, 1192, Japan
  • Akira Uehara Department of Chemistry, University of Kanazawa, Ishikawa, 1192, Japan
Keywords: Aminophosphines, Metal complexes, Cobalt(II) complex, Crystal structure

Abstract

Some iron(II), cobalt(II) and copper(II) complexes of the hybrid ligand 1-(diphenylphosphino)-2-(2-pyridyl)ethane (dppe) and diphenyl-2-pyridylphosphine (dppp) have been synthesised and characterised. Analyses suggest tetrahedral structures in which the metal atoms are bonded to two chlorine atoms and to both phosphorus and nitrogen atoms for 1-(diphenylphosphino)-2-(2-pyridyl)ethane on one hand and on the other hand, bonding is through the nitrogen atoms of two molecules of diphenyl-2-pyridylphosphine, which acts as a monodentate ligand. The crystal structure of 1-(diphenylphosphino)-2-(2-pyridyl)ethane cobalt(II) chloride shows a pseudo-tetrahedral structure in which the aminophosphine is bonded to the cobalt centre through both the phosphorus and nitrogen atoms, forming a 6-membered ring.

 

KEY WORDS: Aminophosphines, Metal complexes, Cobalt(II) complex, Crystal structure

 

 

Bull. Chem. Soc. Ethiop. 2008, 22(2), 253-260.

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eISSN: 1726-801X
print ISSN: 1011-3924