Syntheses, Crystal Structures, Magnetic Behaviours, and Thermal Properties of Three Hydrogen-Bonding Networks Containing Dicyanamide and 4-Hydroxypyridine

Three new dicyanamide-bridged polymeric complexes of {[Mn(dca)2(L)2]·2H2O}n (1), {[Cd(dca)2(L)2]·2H2O}n (2), and {[Co(dca)2(L)2]2(L)}n (3) (dca = dicyanamide, L = pyridinium-4-olate) have been synthesized and structurally characterized. In the three compounds, the protons of hydroxyl groups of 4-hyd...

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Main Author: Lingling Zheng
Format: Article
Language:English
Published: Wiley 2013-01-01
Series:Journal of Chemistry
Online Access:http://dx.doi.org/10.1155/2013/291703
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author Lingling Zheng
author_facet Lingling Zheng
author_sort Lingling Zheng
collection DOAJ
description Three new dicyanamide-bridged polymeric complexes of {[Mn(dca)2(L)2]·2H2O}n (1), {[Cd(dca)2(L)2]·2H2O}n (2), and {[Co(dca)2(L)2]2(L)}n (3) (dca = dicyanamide, L = pyridinium-4-olate) have been synthesized and structurally characterized. In the three compounds, the protons of hydroxyl groups of 4-hydroxypyridine transfer to pyridyl nitrogen atoms. Compounds 1 and 2 are isomorphous forming one-dimensional [M(dca)2(L)2]n chains where metals are connected by double dca anions. These one-dimensional chains are extended into two-dimensional layers through weak C–H⋯N hydrogen bonds. Further, these layers are assembled into a three-dimensional supramolecular network through N–H⋯O, O–H⋯O hydrogen bonds. Complex 3 is a coordination layer of (4, 4) topology with octahedral metal centers linked by four single μ1,5-bridges. These layers are interlocked by N–H⋯O, O–H⋯O hydrogen bonds from coordinated water molecules and free L molecules, which leads to a three-dimensional supramolecular architecture. The variable temperature magnetic susceptibilities measurement of compounds 1 and 3 shows the existence of weak antiferromagnetic interactions between the metal centers. The thermogravimetric analyses of the compounds 1–3 are also discussed.
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spelling doaj-art-29ca940ad4d749e7b0a9d29ce13659012025-02-03T01:01:11ZengWileyJournal of Chemistry2090-90632090-90712013-01-01201310.1155/2013/291703291703Syntheses, Crystal Structures, Magnetic Behaviours, and Thermal Properties of Three Hydrogen-Bonding Networks Containing Dicyanamide and 4-HydroxypyridineLingling Zheng0Guangzhou Vocational College of Technology & Business, Guangzhou 511442, ChinaThree new dicyanamide-bridged polymeric complexes of {[Mn(dca)2(L)2]·2H2O}n (1), {[Cd(dca)2(L)2]·2H2O}n (2), and {[Co(dca)2(L)2]2(L)}n (3) (dca = dicyanamide, L = pyridinium-4-olate) have been synthesized and structurally characterized. In the three compounds, the protons of hydroxyl groups of 4-hydroxypyridine transfer to pyridyl nitrogen atoms. Compounds 1 and 2 are isomorphous forming one-dimensional [M(dca)2(L)2]n chains where metals are connected by double dca anions. These one-dimensional chains are extended into two-dimensional layers through weak C–H⋯N hydrogen bonds. Further, these layers are assembled into a three-dimensional supramolecular network through N–H⋯O, O–H⋯O hydrogen bonds. Complex 3 is a coordination layer of (4, 4) topology with octahedral metal centers linked by four single μ1,5-bridges. These layers are interlocked by N–H⋯O, O–H⋯O hydrogen bonds from coordinated water molecules and free L molecules, which leads to a three-dimensional supramolecular architecture. The variable temperature magnetic susceptibilities measurement of compounds 1 and 3 shows the existence of weak antiferromagnetic interactions between the metal centers. The thermogravimetric analyses of the compounds 1–3 are also discussed.http://dx.doi.org/10.1155/2013/291703
spellingShingle Lingling Zheng
Syntheses, Crystal Structures, Magnetic Behaviours, and Thermal Properties of Three Hydrogen-Bonding Networks Containing Dicyanamide and 4-Hydroxypyridine
Journal of Chemistry
title Syntheses, Crystal Structures, Magnetic Behaviours, and Thermal Properties of Three Hydrogen-Bonding Networks Containing Dicyanamide and 4-Hydroxypyridine
title_full Syntheses, Crystal Structures, Magnetic Behaviours, and Thermal Properties of Three Hydrogen-Bonding Networks Containing Dicyanamide and 4-Hydroxypyridine
title_fullStr Syntheses, Crystal Structures, Magnetic Behaviours, and Thermal Properties of Three Hydrogen-Bonding Networks Containing Dicyanamide and 4-Hydroxypyridine
title_full_unstemmed Syntheses, Crystal Structures, Magnetic Behaviours, and Thermal Properties of Three Hydrogen-Bonding Networks Containing Dicyanamide and 4-Hydroxypyridine
title_short Syntheses, Crystal Structures, Magnetic Behaviours, and Thermal Properties of Three Hydrogen-Bonding Networks Containing Dicyanamide and 4-Hydroxypyridine
title_sort syntheses crystal structures magnetic behaviours and thermal properties of three hydrogen bonding networks containing dicyanamide and 4 hydroxypyridine
url http://dx.doi.org/10.1155/2013/291703
work_keys_str_mv AT linglingzheng synthesescrystalstructuresmagneticbehavioursandthermalpropertiesofthreehydrogenbondingnetworkscontainingdicyanamideand4hydroxypyridine