Synthesis, characterization, and structures of zinc(II) and cadmium(II) complexes with phosphoramides bearing cyclic amino groups,Journal of Coordination Chemistry

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Synthesis, characterization, and structures of zinc(II) and cadmium(II) complexes with phosphoramides bearing cyclic amino groups
Journal of Coordination Chemistry ( IF 2.2 ) Pub Date : 2020-02-01 , DOI: 10.1080/00958972.2020.1731485
Mohamed M’haiham _{1,

2} , Khaled Ebeid ₁ , Fatimetou Ebnou ₁ , Cameron L. Carpenter-Warren ₃ , Alexandra M. Z. Slawin ₃ , John Derek Woollins ₄ , Med Taieb Ben Dhia ₂ , Med Abderrahmane K. Sanhoury _{1,

2}

Affiliation

Abstract Twelve new zinc(II) and cadmium(II) complexes with symmetric ligands, [MCl2((R2N)3PO)2] (M = Zn, R2N = pyrrolidinyl (1), piperidinyl (2); M = Cd, R2N = pyrrolidinyl (3), piperidinyl (4)), and differently substituted ligands of the general formula [MCl2(R2N)PO(R’2N)2] (M = Zn or Cd; R2N = Pyrr, Pip or Mor; R’2N = Pyrr, Pip or Mor (5–12) have been synthesized from reaction of zinc(II) or cadmium(II) chlorides with the ligands, giving yields of 43–76%. The complexes were characterized with multinuclear (1H, 13C and 31P) NMR, conductivity, IR spectroscopy, and X-ray analyses. Complexes 1, 3, 11, and 12 are comprised of two ligands coordinated to the metal center in a distorted monomeric tetrahedral arrangement. The P = O bond lengths of 1.490(3) (1), 1.497(4) (3), 1.480(4) (11), and 1.479(5) Å (12) are in the order observed for analogous phosphoramide complexes. The results are compared with those reported for related chalcogen counterparts. Graphical Abstract

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