Dinickel(II), dizinc(II) and dilead(II) complexes of a pyridazine- containing Schiff-base macrocycle

Carsten D. Brandt; Paul G. Plieger; Robert J. Kelly; Duncan J. De Geest; Dietmar K. Kennepohl; Simon S. Iremonger; Sally Brooker

doi:10.1016/j.ica.2004.06.013

Dinickel(II), dizinc(II) and dilead(II) complexes of a pyridazine- containing Schiff-base macrocycle

Carsten D. Brandt
, Paul G. Plieger
, Robert J. Kelly
, Duncan J. De Geest
, Dietmar K. Kennepohl
, Simon S. Iremonger
, Sally Brooker

Centre for Science

University of Otago

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

12 Citations (Scopus)

Abstract

The preparation and structure of dinickel(II), dizinc(II) and dilead(II) complexes of this (2 + 2) macrocycle are described, along with the electrochemical behaviour of the dizinc(II) complex and attempts to explore the iron(II) coordination chemistry of L1. The study of the mid-late first row transition metal co-ordination chemistry of the pyridazine-containing Schiff-base macrocycle L1 [derived from the (2 + 2) condensation of 3,6-diformylpyridazine and 1,3-diaminopropane] has been completed. Transmetallation reactions of [Pb₂(4 + 4)](ClO₄) ₄ (1) under appropriate conditions have led to the formation of the following complexes, [Ni₂L1(NCS)₂(SCN)₂] (3), [{Pb₂L1}₂(μ³-OH)₂](ClO ₄)₆ (4), and [Zn₂L1(CH₃CN) ₄](ClO₄)₄ (5 • 4CH₃CN), all of which have been structurally characterised. The analogous triflate salt of 5, [Zn₂L1](CF₃SO₃)₄ (6), can only be obtained by template reaction, as transmetallation of 1 with Zn(CF ₃SO₃)₂ • 6H₂O gave 5, albeit in reduced yield. Attempts to synthesise pure [Fe₂L1(CH ₃CN)₄](ClO₄)₄ (7) using the transmetallation procedure, from either [Pb₂(4 + 4)](ClO ₄)₄ or [Zn₂L1(CH₃CN) ₄](ClO₄)₄, were unsuccessful. The electrochemical studies carried out on [Zn₂L1](ClO₄) ₄ (5) revealed multiple reduction processes and associated oxidations, but no processes corresponding to oxidation of 5.

Original language	English
Pages (from-to)	4265-4272
Number of pages	8
Journal	Inorganica Chimica Acta
Volume	357
Issue number	14
DOIs	https://doi.org/10.1016/j.ica.2004.06.013
Publication status	Published - 15 Nov. 2004

Keywords

Electrochemistry
Macrocycle
Pyridazine
Schiff base
Structure determination

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10.1016/j.ica.2004.06.013

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@article{3409ab4ecb7f4db9bc70eb4b60357306,

title = "Dinickel(II), dizinc(II) and dilead(II) complexes of a pyridazine- containing Schiff-base macrocycle",

abstract = "The preparation and structure of dinickel(II), dizinc(II) and dilead(II) complexes of this (2 + 2) macrocycle are described, along with the electrochemical behaviour of the dizinc(II) complex and attempts to explore the iron(II) coordination chemistry of L1. The study of the mid-late first row transition metal co-ordination chemistry of the pyridazine-containing Schiff-base macrocycle L1 [derived from the (2 + 2) condensation of 3,6-diformylpyridazine and 1,3-diaminopropane] has been completed. Transmetallation reactions of [Pb2(4 + 4)](ClO4) 4 (1) under appropriate conditions have led to the formation of the following complexes, [Ni2L1(NCS)2(SCN)2] (3), [\{Pb2L1\}2(μ3-OH)2](ClO 4)6 (4), and [Zn2L1(CH3CN) 4](ClO4)4 (5 • 4CH3CN), all of which have been structurally characterised. The analogous triflate salt of 5, [Zn2L1](CF3SO3)4 (6), can only be obtained by template reaction, as transmetallation of 1 with Zn(CF 3SO3)2 • 6H2O gave 5, albeit in reduced yield. Attempts to synthesise pure [Fe2L1(CH 3CN)4](ClO4)4 (7) using the transmetallation procedure, from either [Pb2(4 + 4)](ClO 4)4 or [Zn2L1(CH3CN) 4](ClO4)4, were unsuccessful. The electrochemical studies carried out on [Zn2L1](ClO4) 4 (5) revealed multiple reduction processes and associated oxidations, but no processes corresponding to oxidation of 5.",

keywords = "Electrochemistry, Macrocycle, Pyridazine, Schiff base, Structure determination",

author = "Brandt, \{Carsten D.\} and Plieger, \{Paul G.\} and Kelly, \{Robert J.\} and \{De Geest\}, \{Duncan J.\} and Kennepohl, \{Dietmar K.\} and Iremonger, \{Simon S.\} and Sally Brooker",

note = "Funding Information: This work was supported by grants from the University of Otago and the Marsden Fund (Royal Society of New Zealand). D.K.K. thanks Athabasca University for granting him study leave. We are grateful to Professor W.T. Robinson and Dr. J. Wikaira (University of Canterbury) for the X-ray data collections. ",

year = "2004",

month = nov,

day = "15",

doi = "10.1016/j.ica.2004.06.013",

language = "English",

volume = "357",

pages = "4265--4272",

number = "14",

}

TY - JOUR

T1 - Dinickel(II), dizinc(II) and dilead(II) complexes of a pyridazine- containing Schiff-base macrocycle

AU - Brandt, Carsten D.

AU - Plieger, Paul G.

AU - Kelly, Robert J.

AU - De Geest, Duncan J.

AU - Kennepohl, Dietmar K.

AU - Iremonger, Simon S.

AU - Brooker, Sally

N1 - Funding Information: This work was supported by grants from the University of Otago and the Marsden Fund (Royal Society of New Zealand). D.K.K. thanks Athabasca University for granting him study leave. We are grateful to Professor W.T. Robinson and Dr. J. Wikaira (University of Canterbury) for the X-ray data collections.

PY - 2004/11/15

Y1 - 2004/11/15

N2 - The preparation and structure of dinickel(II), dizinc(II) and dilead(II) complexes of this (2 + 2) macrocycle are described, along with the electrochemical behaviour of the dizinc(II) complex and attempts to explore the iron(II) coordination chemistry of L1. The study of the mid-late first row transition metal co-ordination chemistry of the pyridazine-containing Schiff-base macrocycle L1 [derived from the (2 + 2) condensation of 3,6-diformylpyridazine and 1,3-diaminopropane] has been completed. Transmetallation reactions of [Pb2(4 + 4)](ClO4) 4 (1) under appropriate conditions have led to the formation of the following complexes, [Ni2L1(NCS)2(SCN)2] (3), [{Pb2L1}2(μ3-OH)2](ClO 4)6 (4), and [Zn2L1(CH3CN) 4](ClO4)4 (5 • 4CH3CN), all of which have been structurally characterised. The analogous triflate salt of 5, [Zn2L1](CF3SO3)4 (6), can only be obtained by template reaction, as transmetallation of 1 with Zn(CF 3SO3)2 • 6H2O gave 5, albeit in reduced yield. Attempts to synthesise pure [Fe2L1(CH 3CN)4](ClO4)4 (7) using the transmetallation procedure, from either [Pb2(4 + 4)](ClO 4)4 or [Zn2L1(CH3CN) 4](ClO4)4, were unsuccessful. The electrochemical studies carried out on [Zn2L1](ClO4) 4 (5) revealed multiple reduction processes and associated oxidations, but no processes corresponding to oxidation of 5.

AB - The preparation and structure of dinickel(II), dizinc(II) and dilead(II) complexes of this (2 + 2) macrocycle are described, along with the electrochemical behaviour of the dizinc(II) complex and attempts to explore the iron(II) coordination chemistry of L1. The study of the mid-late first row transition metal co-ordination chemistry of the pyridazine-containing Schiff-base macrocycle L1 [derived from the (2 + 2) condensation of 3,6-diformylpyridazine and 1,3-diaminopropane] has been completed. Transmetallation reactions of [Pb2(4 + 4)](ClO4) 4 (1) under appropriate conditions have led to the formation of the following complexes, [Ni2L1(NCS)2(SCN)2] (3), [{Pb2L1}2(μ3-OH)2](ClO 4)6 (4), and [Zn2L1(CH3CN) 4](ClO4)4 (5 • 4CH3CN), all of which have been structurally characterised. The analogous triflate salt of 5, [Zn2L1](CF3SO3)4 (6), can only be obtained by template reaction, as transmetallation of 1 with Zn(CF 3SO3)2 • 6H2O gave 5, albeit in reduced yield. Attempts to synthesise pure [Fe2L1(CH 3CN)4](ClO4)4 (7) using the transmetallation procedure, from either [Pb2(4 + 4)](ClO 4)4 or [Zn2L1(CH3CN) 4](ClO4)4, were unsuccessful. The electrochemical studies carried out on [Zn2L1](ClO4) 4 (5) revealed multiple reduction processes and associated oxidations, but no processes corresponding to oxidation of 5.

KW - Electrochemistry

KW - Macrocycle

KW - Pyridazine

KW - Schiff base

KW - Structure determination

UR - https://www.scopus.com/pages/publications/8144219690

U2 - 10.1016/j.ica.2004.06.013

DO - 10.1016/j.ica.2004.06.013

M3 - Journal Article

AN - SCOPUS:8144219690

SN - 0020-1693

VL - 357

SP - 4265

EP - 4272

JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

IS - 14

ER -

Dinickel(II), dizinc(II) and dilead(II) complexes of a pyridazine- containing Schiff-base macrocycle

Abstract

Keywords

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