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Molecular “Multi‐rod Cable” {[Co(NC 5 H 4 –CH=CH–C 6 H 4 –CH=CH–C 5 H 4 N)(HCOO) 2 ] 8 } n : A Novel Supramolecular Architecture by Cooperation of Coordination and Stacking Interactions
Author(s) -
Domasevitch Konstantin V.,
Sieler Joachim,
Rusanov Eduard B.,
Chernega Alexander N.
Publication year - 2002
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/1521-3749(200201)628:1<51::aid-zaac51>3.0.co;2-o
Subject(s) - stacking , formate , chemistry , supramolecular chemistry , crystallography , cobalt , formamide , stereochemistry , crystal structure , inorganic chemistry , organic chemistry , catalysis
The cobalt‐formate coordination polymers {[Co(bpyph)(HCOO) 2 ] 8 } n ( 1 ) (bpyph = 1,4‐bis(2‐(4‐pyridyl)ethenyl)benzene) and {[Co(HCONH 2 ) 2 (HCOO) 2 ]} n ( 2 ) have been prepared by interaction of Co(NO 3 ) 2 · 6 H 2 O in formamide solution with generation of formate anion by hydrolysis of the solvent. Coordination polymer 1 reveals an unprecedented example of “molecular multi‐rod cable” architecture, in which eight single “molecular wires” {[Co(bpyph)]} n are interlinked by bridging formate anions to give infinite octameric chains. The formate groups adopt mono‐, and bi‐ and tridentate bridging and chelate modes of coordination (Co–O 1.966–2.134 Å). The coordination geometry around the cobalt atoms is essentially dominated by the demands for most effective packing of parallel situated polycyclic aromatic ligands, with extensive CH…π, or edge‐to‐face stacking interactions within the single octameric chain as well as between the closest neighbours (C…C separations within this stack are ca . 3.50 Å).