Novel hydrogen-bonded two- and three-dimensional networks generated from the reaction of metal nitrate hydrates (M = Cd, Co) with the bidentate linear ligand 4,4'-bipyridine

Autor: Dong, Yu-Bin, Smith, Mark D., Layland, Ralph C., Loye, Hans-Conrad zur
Zdroj: Journal of the Chemical Society, Dalton Transactions; March 7, 2000, Vol. 2000 Issue: 5 p775-780, 6p
Abstrakt: Two new hydrogen-bonded coordination polymers have been prepared using the transition metal nitrate hydrates Cd(NO3)2·4H2O and Co(NO3)2·6H2O in combination with the organic bidentate ligand 4,4'-bipyridine: Cd2(H2O)4(bipy)5(NO3)2(PF6)2 (1) (bipy = 4,4'-bipyridine) and [Co(H2O)4(bipy)][PF6]2·3bipy (2). The compounds were characterized by single crystal X-ray diffraction, IR spectroscopy, and thermogravimetric analysis. Compound 1 shows a novel hydrogen bonded brick wall motif assembled from unprecedented dimeric “H-shaped” [Cd2(bipy)5] building blocks via a new complementary binary hydrogen bonding bridge. Compound 2 forms a novel three-dimensional network based on [Co(H2O)4(bipy)]n linear polymer chains which are cross-linked to each other by a new type of Co–H2O(2)  · · ·  bipy  · · ·  H2O(1)  · · ·  bipy  · · ·  H2O(1)  · · ·  bipy  · · ·  H2O(2)–Co hydrogen bonding linkage.
Databáze: Supplemental Index
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