4,4′-Dipyridyl-N,N′-dioxide complexes of metal-thiocyanate/ selenocyanate: π-stacked molecular rods as three-dimensional support for two-dimensional polymeric sheets and intra/interchain S⋯S interaction dependent architecture of the R22(8) synthon driven assembly of one-dimensional polymeric chains

Atish Dipankar Jana, Subal Chandra Manna, Georgina M. Rosair, M. G B Drew, Golam Mostafa, Nirmalendu Ray Chaudhuri

Research output: Contribution to journalArticle

Abstract

Three supramolecular complexes of Co(II) using SCN-/SeCN - in combination with 4,4'-dipyridyl-N,N'-dioxide (dpyo), i.e., {[Co(SCN)2(dpyo)2]·(dpyo)}n (1), {[Co(SCN)2(dpyo)(H2O)2]·(H 2O)}n (2), {[Co(SeCN)2(dpyo)(H 2O)2]·(H2O)}n (3), have been synthesized and characterized by single-crystal X-ray analysis. Complex 1 is a rare example of a dpyo bridged two-dimensional (2D) coordination polymer, and p-stacked dpyo supramolecular rods are generated by the lattice dpyo, passing through the rhombic grid of stacked layers, resulting in a three-dimensional (3D) superstructure. Complexes 2 and 3 are isomorphous one-dimensional (1D) coordination polymers [-Co-dpyo-Co-] that undergo self-assembly leading to a bilayer architecture derived through an R22(8) H-bonding synthon between coordinated water and dpyo oxygen. A reinvestigation of coordination polymers [Mn(SCN)2(dpyo)(H2O)(MeOH)] n (4) and {[Fe(SCN)2(dpyo)(H2O) 2]·(H2O)}n (5) reported recently by our group [Manna et al. Indian J. Chem. 2006, 45A, 1813] reveals brick wall topology rather than bilayer architecture is due to the decisive role of S?S/Se?Se interactions in determining the helical nature in 4 and 5 as compared to zigzag polymeric chains in 2 and 3, although the same R 22(8) synthon is responsible for supramolecular assembly in these complexes. © 2007 American Chemical Society.

Original languageEnglish
Pages (from-to)1365-1372
Number of pages8
JournalCrystal Growth and Design
Volume7
Issue number7
DOIs
Publication statusPublished - Jul 2007

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