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

Twelve new zinc(II) and cadmium(II) complexes with symmetric ligands, [MCl 2 ((R 2 N) 3 PO) 2 ] (M = Zn, R 2 N = pyrrolidinyl (1), piperidinyl (2); M = Cd, R 2 N = pyrrolidinyl (3), piperidinyl (4)), and differently substituted ligands of the general formula [MCl 2 (R 2 N)PO(R' 2 N) 2 ] (M = Zn...

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Bibliographic Details
Published in:Journal of coordination chemistry 2020-02, Vol.73 (3), p.453-466
Main Authors: M'haiham, Mohamed, Ebeid, Khaled, Ebnou, Fatimetou, Carpenter-Warren, Cameron L., Slawin, Alexandra M. Z., Woollins, John Derek, Ben Dhia, Med Taieb, Sanhoury, Med Abderrahmane K.
Format: Article
Language:English
Subjects:
Cadmium
cadmium(II)
Chemical synthesis
Coordination compounds
Infrared spectroscopy
Ligands
metal complex
NMR
Nuclear magnetic resonance
Phosphoramides
X-ray analysis
Zinc
zinc(II)
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Summary:Twelve new zinc(II) and cadmium(II) complexes with symmetric ligands, [MCl 2 ((R 2 N) 3 PO) 2 ] (M = Zn, R 2 N = pyrrolidinyl (1), piperidinyl (2); M = Cd, R 2 N = pyrrolidinyl (3), piperidinyl (4)), and differently substituted ligands of the general formula [MCl 2 (R 2 N)PO(R' 2 N) 2 ] (M = Zn or Cd; R 2 N = Pyrr, Pip or Mor; R' 2 N = 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 ( 1 H, 13 C and 31 P) 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.
ISSN:0095-8972
1029-0389
DOI:10.1080/00958972.2020.1731485