Bis-tridentate chelates of Cd(ClO 4) 2 and Hg(ClO 4) 2 with N 4Se 2 metal coordination environments were isolated by slow evaporation from methanol/n-butanol solutions containing two equivalents of bis(2-methylpyridyl)selenide (L). The ligand L was obtained through a previously unexplored pathway to symmetric selenoethers involving selenoacetamide. Although no structurally characterized complexes of the harder group 12 metal ions Zn(II) or Cd(II) with selenoether ligands have had M-SeR 2 bonds and numerous attempts to crystallize a bis-tridentate chelate of Zn(II) were unsuccessful, the distorted trans facial octahedral complex [CdL 2](ClO 4) 2 was characterized. In addition, X-ray crystallographic characterization of [HgL 2](ClO 4) 2 revealed a mononuclear structure with distorted trigonal prismatic coordination geometry, the highest coordination number Hg(II) complex with selenoether ligands yet reported.
Bibliographical noteFunding Information:
This work was supported in part by the US National Science Foundation Division of Chemistry under Grant 0315934 . Purchase of the College of William & Mary Smart Apex II diffractometer was also supported by the National Science Foundation. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. We also thank the Camille and Henry Dreyfus Foundation for a Scholar/Fellow award to D.C.B. for support of S.M.B. and the research.
- Bis-tridentate chelate
- Group 12
- Single crystal X-ray structure
- Symmetric selenoether