Competition between coordination and hydrogen bonding in networks constructed using dipyridyl-1H-pyrazole ligands

Andrew D. Burrows; David J. Kelly; M. Infas Haja Mohideen; Mary F. Mahon; Viorica M. Pop; Christopher Richardson

doi:10.1039/c0ce00310g

Competition between coordination and hydrogen bonding in networks constructed using dipyridyl-1H-pyrazole ligands

Andrew D. Burrows
, David J. Kelly
, M. Infas Haja Mohideen
, Mary F. Mahon
, Viorica M. Pop
, Christopher Richardson

Chemistry

University of Bath
University of Wollongong

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

The reaction between zinc(ii) acetate and 3,5-di(4-pyridyl)-1H-pyrazole (HL¹) is crucially dependent on the solvent, with products based on different architectures formed in DMF, methanol and water. When the reaction is undertaken in DMF, the product is [Zn₃(OAc)₆(HL ¹)₄] 1, in which Zn(OAc)₂ centres link Zn ₂(OAc)₄(HL¹)₄ units into double-stranded zig-zag chains. Each chain is 'broken' after every fourth HL¹ ligand, though the links between the chains ensure a coordination polymer is formed. The reaction in methanol produces [Zn(OAc) ₂(HL¹)]·0.5MeOH 2 which also contains double-stranded chains, though in this case both chains are continuous. The hydrothermal reaction gives [Zn(OAc)₂(HL¹) ₂]·H₂O 3, which contains discrete zinc complex molecules that are linked into double-stranded chains through hydrogen bonds. Zinc(ii) chloride reacts with HL¹ to form [ZnCl₂(L ¹)] 4. The structure of 4 consists of chains that are cross-linked into sheets by N-H⋯Cl hydrogen bonds. The nitrates of zinc(ii), cobalt(ii) and nickel(ii) react with 3,5-di(3-pyridyl)-1H-pyrazole (HL ²) to form [M(MeOH)₄(HL²)₂](NO ₃)₂·2H₂O (5, M = Zn; 6, M = Co; 7, M = Ni). These isostructural compounds contain discrete cations that are linked into double-stranded chains by O-H⋯N hydrogen bonds, with further hydrogen bonds connecting these into sheets. The structures of 1-3 and 5-7 all contain double-stranded chains, with both bridging ligands and hydrogen bonds linking individual chains into pairs.

Original language	British English
Pages (from-to)	1676-1682
Number of pages	7
Journal	CrystEngComm
Volume	13
Issue number	5
DOIs	https://doi.org/10.1039/c0ce00310g
State	Published - 7 Mar 2011

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title = "Competition between coordination and hydrogen bonding in networks constructed using dipyridyl-1H-pyrazole ligands",

abstract = "The reaction between zinc(ii) acetate and 3,5-di(4-pyridyl)-1H-pyrazole (HL1) is crucially dependent on the solvent, with products based on different architectures formed in DMF, methanol and water. When the reaction is undertaken in DMF, the product is [Zn3(OAc)6(HL 1)4] 1, in which Zn(OAc)2 centres link Zn 2(OAc)4(HL1)4 units into double-stranded zig-zag chains. Each chain is 'broken' after every fourth HL1 ligand, though the links between the chains ensure a coordination polymer is formed. The reaction in methanol produces [Zn(OAc) 2(HL1)]·0.5MeOH 2 which also contains double-stranded chains, though in this case both chains are continuous. The hydrothermal reaction gives [Zn(OAc)2(HL1) 2]·H2O 3, which contains discrete zinc complex molecules that are linked into double-stranded chains through hydrogen bonds. Zinc(ii) chloride reacts with HL1 to form [ZnCl2(L 1)] 4. The structure of 4 consists of chains that are cross-linked into sheets by N-H⋯Cl hydrogen bonds. The nitrates of zinc(ii), cobalt(ii) and nickel(ii) react with 3,5-di(3-pyridyl)-1H-pyrazole (HL 2) to form [M(MeOH)4(HL2)2](NO 3)2·2H2O (5, M = Zn; 6, M = Co; 7, M = Ni). These isostructural compounds contain discrete cations that are linked into double-stranded chains by O-H⋯N hydrogen bonds, with further hydrogen bonds connecting these into sheets. The structures of 1-3 and 5-7 all contain double-stranded chains, with both bridging ligands and hydrogen bonds linking individual chains into pairs.",

author = "Burrows, \{Andrew D.\} and Kelly, \{David J.\} and \{Haja Mohideen\}, \{M. Infas\} and Mahon, \{Mary F.\} and Pop, \{Viorica M.\} and Christopher Richardson",

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T1 - Competition between coordination and hydrogen bonding in networks constructed using dipyridyl-1H-pyrazole ligands

AU - Burrows, Andrew D.

AU - Kelly, David J.

AU - Haja Mohideen, M. Infas

AU - Mahon, Mary F.

AU - Pop, Viorica M.

AU - Richardson, Christopher

PY - 2011/3/7

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N2 - The reaction between zinc(ii) acetate and 3,5-di(4-pyridyl)-1H-pyrazole (HL1) is crucially dependent on the solvent, with products based on different architectures formed in DMF, methanol and water. When the reaction is undertaken in DMF, the product is [Zn3(OAc)6(HL 1)4] 1, in which Zn(OAc)2 centres link Zn 2(OAc)4(HL1)4 units into double-stranded zig-zag chains. Each chain is 'broken' after every fourth HL1 ligand, though the links between the chains ensure a coordination polymer is formed. The reaction in methanol produces [Zn(OAc) 2(HL1)]·0.5MeOH 2 which also contains double-stranded chains, though in this case both chains are continuous. The hydrothermal reaction gives [Zn(OAc)2(HL1) 2]·H2O 3, which contains discrete zinc complex molecules that are linked into double-stranded chains through hydrogen bonds. Zinc(ii) chloride reacts with HL1 to form [ZnCl2(L 1)] 4. The structure of 4 consists of chains that are cross-linked into sheets by N-H⋯Cl hydrogen bonds. The nitrates of zinc(ii), cobalt(ii) and nickel(ii) react with 3,5-di(3-pyridyl)-1H-pyrazole (HL 2) to form [M(MeOH)4(HL2)2](NO 3)2·2H2O (5, M = Zn; 6, M = Co; 7, M = Ni). These isostructural compounds contain discrete cations that are linked into double-stranded chains by O-H⋯N hydrogen bonds, with further hydrogen bonds connecting these into sheets. The structures of 1-3 and 5-7 all contain double-stranded chains, with both bridging ligands and hydrogen bonds linking individual chains into pairs.

AB - The reaction between zinc(ii) acetate and 3,5-di(4-pyridyl)-1H-pyrazole (HL1) is crucially dependent on the solvent, with products based on different architectures formed in DMF, methanol and water. When the reaction is undertaken in DMF, the product is [Zn3(OAc)6(HL 1)4] 1, in which Zn(OAc)2 centres link Zn 2(OAc)4(HL1)4 units into double-stranded zig-zag chains. Each chain is 'broken' after every fourth HL1 ligand, though the links between the chains ensure a coordination polymer is formed. The reaction in methanol produces [Zn(OAc) 2(HL1)]·0.5MeOH 2 which also contains double-stranded chains, though in this case both chains are continuous. The hydrothermal reaction gives [Zn(OAc)2(HL1) 2]·H2O 3, which contains discrete zinc complex molecules that are linked into double-stranded chains through hydrogen bonds. Zinc(ii) chloride reacts with HL1 to form [ZnCl2(L 1)] 4. The structure of 4 consists of chains that are cross-linked into sheets by N-H⋯Cl hydrogen bonds. The nitrates of zinc(ii), cobalt(ii) and nickel(ii) react with 3,5-di(3-pyridyl)-1H-pyrazole (HL 2) to form [M(MeOH)4(HL2)2](NO 3)2·2H2O (5, M = Zn; 6, M = Co; 7, M = Ni). These isostructural compounds contain discrete cations that are linked into double-stranded chains by O-H⋯N hydrogen bonds, with further hydrogen bonds connecting these into sheets. The structures of 1-3 and 5-7 all contain double-stranded chains, with both bridging ligands and hydrogen bonds linking individual chains into pairs.

UR - https://www.scopus.com/pages/publications/79951794043

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DO - 10.1039/c0ce00310g

M3 - Article

AN - SCOPUS:79951794043

SN - 1466-8033

VL - 13

SP - 1676

EP - 1682

JO - CrystEngComm

JF - CrystEngComm

IS - 5

ER -

Competition between coordination and hydrogen bonding in networks constructed using dipyridyl-1H-pyrazole ligands

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