New tridentate ether-phosphine {P, 2O} and ether-phosphine oxide {OP, 2O} ligands with P and O donor-atoms have been synthesized starting from ClCH₂CH(OCH₃)₂. The oxidation process of Ph₂PCH₂CH(OCH₃)₂ to its oxide derivative Ph₂P(O)CH₂CH(OCH₃)₂ was monitored by ³¹P NMR for the first time. The desired ligands and their Co(II) complexes structures were deduced from IR, EA, MS, NMR, UV–Vis., TG/DTG and XRD physical measurements. The tridentate chelating coordination behavior of the ether-phosphine wasn't detected leading only to the mono-dentate coordination mode through the phosphorous atoms to set up a X₂Co[η¹-Ph₂PCH₂CH(OCH₃)₂]₂ as final isomer formula (X = Cl or Br). The Cl₂Co[η¹-Ph₂PCH₂CH(OCH₃)₂]₂ isomer belongs to complex 1 was supported by single crystal measurement. Polar/non-polar intermolecular short contacts were detected by XRD and Hirshfeld surface theoretical analysis.

Keywords

• Cobalt(II) complexes; 
• P∼O hemilabile ligands; 
• XRD; 
• Hirshfeld surface analysis

Title

Journal of Molecular Structure

Publisher

Elsevier

Publisher Country

United States of America

Indexing

Scopus

Impact Factor

1.78

Publication Type

Prtinted only

Volume

1134

Year

2017

Pages

17-24