Copper(II) Complexes of ω‐Hydroxy‐Functionalized N‐Salicylidenehydrazides show pH‐Controlled Switching between Dicationic Dimers and Neutral One‐Dimensional Coordination Polymers
Abstract New copper(II) complexes of the hydrazone ligands H 2 salhyhb, H 2 salhyhp, and H 2 salhyhh, derived from salicylaldehyde and ω ‐hydroxy carbonic acid hydrazides, have been synthesized and physically characterized. Two fundamental structures were found in solid state depending on the pH‐val...
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crwiley:10.1002/zaac.200600309 2024-06-02T08:05:13+00:00 Copper(II) Complexes of ω‐Hydroxy‐Functionalized N‐Salicylidenehydrazides show pH‐Controlled Switching between Dicationic Dimers and Neutral One‐Dimensional Coordination Polymers Roth, Arne Buchholz, Axel Plass, Winfried 2007 http://dx.doi.org/10.1002/zaac.200600309 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fzaac.200600309 https://onlinelibrary.wiley.com/doi/pdf/10.1002/zaac.200600309 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Zeitschrift für anorganische und allgemeine Chemie volume 633, issue 3, page 383-392 ISSN 0044-2313 1521-3749 journal-article 2007 crwiley https://doi.org/10.1002/zaac.200600309 2024-05-03T10:38:21Z Abstract New copper(II) complexes of the hydrazone ligands H 2 salhyhb, H 2 salhyhp, and H 2 salhyhh, derived from salicylaldehyde and ω ‐hydroxy carbonic acid hydrazides, have been synthesized and physically characterized. Two fundamental structures were found in solid state depending on the pH‐value of the reaction solution. Acidic conditions lead to the formation of the di‐ μ ‐phenoxo‐bridged dicationic complex dimers [{Cu(Hsalhyhb)} 2 ] 2+ ( 1a ), [{Cu(Hsalhyhp)} 2 ] 2+ ( 2a ), and [{Cu(Hsalhyhh)} 2 ] 2+ ( 3a ), isolated as perchlorate salts. The dimeric complexes show strong antiferromagnetic coupling with J = −399 ( 1a ), −410 ( 2a ), and −311 cm −1 ( 3a ). Higher pH‐values resulted in the aggregation of neutral copper ligand fragments to the one‐dimensional coordination polymers [{Cu(salhyhb)} n ] ( 1b ), [{Cu(salhyhp)} n ] ( 2b ), and [{Cu(salhyhh)} n ] ( 3b ). 3b has been examined by means of X‐ray crystallography and represents the first example of a structurally characterized neutral copper(II) N ‐salicylidenehydrazide complex without additional ligands. The magnetic interactions in the polymers are also antiferromagnetic with J = −125 ( 1b ), −136 ( 2b ), and −148 cm −1 ( 3b ), but strongly reduced compared to the corresponding dimeric complexes. The two basic structure types can be reversibly interconverted simply by pH‐control. Article in Journal/Newspaper Carbonic acid Wiley Online Library Zeitschrift für anorganische und allgemeine Chemie 633 3 383 392 |
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English |
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Abstract New copper(II) complexes of the hydrazone ligands H 2 salhyhb, H 2 salhyhp, and H 2 salhyhh, derived from salicylaldehyde and ω ‐hydroxy carbonic acid hydrazides, have been synthesized and physically characterized. Two fundamental structures were found in solid state depending on the pH‐value of the reaction solution. Acidic conditions lead to the formation of the di‐ μ ‐phenoxo‐bridged dicationic complex dimers [{Cu(Hsalhyhb)} 2 ] 2+ ( 1a ), [{Cu(Hsalhyhp)} 2 ] 2+ ( 2a ), and [{Cu(Hsalhyhh)} 2 ] 2+ ( 3a ), isolated as perchlorate salts. The dimeric complexes show strong antiferromagnetic coupling with J = −399 ( 1a ), −410 ( 2a ), and −311 cm −1 ( 3a ). Higher pH‐values resulted in the aggregation of neutral copper ligand fragments to the one‐dimensional coordination polymers [{Cu(salhyhb)} n ] ( 1b ), [{Cu(salhyhp)} n ] ( 2b ), and [{Cu(salhyhh)} n ] ( 3b ). 3b has been examined by means of X‐ray crystallography and represents the first example of a structurally characterized neutral copper(II) N ‐salicylidenehydrazide complex without additional ligands. The magnetic interactions in the polymers are also antiferromagnetic with J = −125 ( 1b ), −136 ( 2b ), and −148 cm −1 ( 3b ), but strongly reduced compared to the corresponding dimeric complexes. The two basic structure types can be reversibly interconverted simply by pH‐control. |
format |
Article in Journal/Newspaper |
author |
Roth, Arne Buchholz, Axel Plass, Winfried |
spellingShingle |
Roth, Arne Buchholz, Axel Plass, Winfried Copper(II) Complexes of ω‐Hydroxy‐Functionalized N‐Salicylidenehydrazides show pH‐Controlled Switching between Dicationic Dimers and Neutral One‐Dimensional Coordination Polymers |
author_facet |
Roth, Arne Buchholz, Axel Plass, Winfried |
author_sort |
Roth, Arne |
title |
Copper(II) Complexes of ω‐Hydroxy‐Functionalized N‐Salicylidenehydrazides show pH‐Controlled Switching between Dicationic Dimers and Neutral One‐Dimensional Coordination Polymers |
title_short |
Copper(II) Complexes of ω‐Hydroxy‐Functionalized N‐Salicylidenehydrazides show pH‐Controlled Switching between Dicationic Dimers and Neutral One‐Dimensional Coordination Polymers |
title_full |
Copper(II) Complexes of ω‐Hydroxy‐Functionalized N‐Salicylidenehydrazides show pH‐Controlled Switching between Dicationic Dimers and Neutral One‐Dimensional Coordination Polymers |
title_fullStr |
Copper(II) Complexes of ω‐Hydroxy‐Functionalized N‐Salicylidenehydrazides show pH‐Controlled Switching between Dicationic Dimers and Neutral One‐Dimensional Coordination Polymers |
title_full_unstemmed |
Copper(II) Complexes of ω‐Hydroxy‐Functionalized N‐Salicylidenehydrazides show pH‐Controlled Switching between Dicationic Dimers and Neutral One‐Dimensional Coordination Polymers |
title_sort |
copper(ii) complexes of ω‐hydroxy‐functionalized n‐salicylidenehydrazides show ph‐controlled switching between dicationic dimers and neutral one‐dimensional coordination polymers |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1002/zaac.200600309 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fzaac.200600309 https://onlinelibrary.wiley.com/doi/pdf/10.1002/zaac.200600309 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Zeitschrift für anorganische und allgemeine Chemie volume 633, issue 3, page 383-392 ISSN 0044-2313 1521-3749 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/zaac.200600309 |
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Zeitschrift für anorganische und allgemeine Chemie |
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633 |
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3 |
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383 |
op_container_end_page |
392 |
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1800749996223496192 |