The first crystal structures of two 2-D lead(II)-coordination polymers with picolinic acid N-oxide and pseudohalides extended to 3-D networks by intermolecular interactions

Abstract

Two-dimensional lead(II)-azido and -thiocyanato coordination polymers with picolinate N-oxide (PNO), [Pb(PNO)(NCS)]_n (1) and [Pb(PNO)(N₃)]_n (2) were synthesized and characterized by elemental and thermal analyses, IR and ¹H NMR spectroscopy, and X-ray crystallography. Compound 1 crystallized in the chiral space group P2₁2₁2₁ , whereas 2 adopts the centrosymmetric P2₁/c space group. Multiple weak C–HO and C–HN interactions assemble the polymeric layers into 3-D supramolecular networks.

Keywords:

• Coordination polymers
• Picolinic acid N-oxide
• Lead(II)

Acknowledgments

Support of this investigation by Payame Noor University and Iran National Science Foundation, INSF, is gratefully acknowledged by F.M. H.K.F. and C.K.Q. would like to thank Universiti Sains Malaysia (USM) for the Research University Grant (No. 1001/PFIZIK/811160). The authors extend their appreciation to The Deanship of Scientific Research at King Saud University for the funding the work through the research group project No. RGP-VPP-207.