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Monodentate Coordination of 4,4′‐Bipyridine Leading to a Supramolecular Network – Synthesis and Crystal Structure of [H 2 bpp][{Cu(Hbpy) 2 }{α‐HP 2 W 18 O 62 }]·4H 2 O
Author(s) -
Li Jia,
Wang DaPeng,
Chen YaGuang,
Zhang ChunJing
Publication year - 2009
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/zaac.200900339
Subject(s) - supramolecular chemistry , crystallography , chemistry , denticity , hydrogen bond , ligand (biochemistry) , 4,4' bipyridine , crystal structure , protonation , coordination polymer , bipyridine , stereochemistry , ion , molecule , organic chemistry , biochemistry , receptor
The new supramolecular compound [H 2 bpp][{Cu(Hbpy) 2 }{α‐HP 2 W 18 O 62 }]·4H 2 O ( 1 ) (bpy = 4,4′‐bipyridine, bpp = 1,3‐bis(4‐pyridyl)propane) was synthesized hydrothermally and characterized byelemental analysis, IR spectroscopy, thermogravimetric analysis and single‐crystal X‐ray diffraction. In compound 1 , the cationic fragment [Cu(Hbpy) 2 ] + connects to the Dawson anion through a coordinating Cu←O bond, and the copper atom is coordinated by another polyoxoanion through a weak covalent bond with a Cu1–O26 distance of 2.879(2) Å, forming a polymeric chain. The bpy ligand in [Cu(Hbpy) 2 ] + adopts a monodentate coordination mode, the other nitrogen atom of the bpy ligand is protonated. The protonated Hbpy + acts as hydrogen‐bond donor and constructs a two‐dimensional double‐sheet supramolecular network involving the one‐dimensional chains through the hydrogen bonds. The H 2 bpp 2+ ion connects twoα‐HP 2 W 18 O 62 6– clusters from two supramolecular networks through hydrogen bonds and creates a three‐dimensional supramolecular architecture. The thermal decomposition of 1 happens over a wide temperature range (450–800 °C), which indicates that it might include complicated oxidation–reduction processes.