The crystal chemistry of copper(II) dipicolinates

The molecular structure of a new copper dipicolinate, Cu(dipic)(H2dipic) · H2O, and a refinement of the previously reported Cu(dipic)(H2dipic) · 3H2O are presented. The Jahn-Teller effect, as operative in six-coordinated CuII surrounded by two planar tridentate ligands, is responsible for the presen...

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Publicado: 1996
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02775387_v15_n24_p4531_Sileo
http://hdl.handle.net/20.500.12110/paper_02775387_v15_n24_p4531_Sileo
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_02775387_v15_n24_p4531_Sileo
record_format dspace
spelling paper:paper_02775387_v15_n24_p4531_Sileo2023-06-08T15:26:04Z The crystal chemistry of copper(II) dipicolinates The molecular structure of a new copper dipicolinate, Cu(dipic)(H2dipic) · H2O, and a refinement of the previously reported Cu(dipic)(H2dipic) · 3H2O are presented. The Jahn-Teller effect, as operative in six-coordinated CuII surrounded by two planar tridentate ligands, is responsible for the presence of a dianion and a neutral acid molecule in the structure. As opposed to previously reported copper dipicolinates, water molecules do not coordinate and in the trihydrate dehydration is facile because interstitial water finds easy dehydration pathways ; the mechanism involves nucleation and fast bidimensional growth. The monohydrate, however, presents tightly bound (through hydrogen bonds) water and no easy dehydration pathways are available ; the dehydration mechanism involves fluid-flux nucleation, mediated by fusion. Five different copper(II) dipicolinates are known ; because of the strong tendency of this ligand to form tridentate mononuclear complexes, all of them, except monoclinic Cu(dipic) · 2H2O, belong to the class of molecular solids. In the monoclinic dihydrate, carbonyl O atoms are involved in defining chains that run parallel to [001] planes. Copyright © 1996 Elsevier Science Ltd. 1996 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02775387_v15_n24_p4531_Sileo http://hdl.handle.net/20.500.12110/paper_02775387_v15_n24_p4531_Sileo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The molecular structure of a new copper dipicolinate, Cu(dipic)(H2dipic) · H2O, and a refinement of the previously reported Cu(dipic)(H2dipic) · 3H2O are presented. The Jahn-Teller effect, as operative in six-coordinated CuII surrounded by two planar tridentate ligands, is responsible for the presence of a dianion and a neutral acid molecule in the structure. As opposed to previously reported copper dipicolinates, water molecules do not coordinate and in the trihydrate dehydration is facile because interstitial water finds easy dehydration pathways ; the mechanism involves nucleation and fast bidimensional growth. The monohydrate, however, presents tightly bound (through hydrogen bonds) water and no easy dehydration pathways are available ; the dehydration mechanism involves fluid-flux nucleation, mediated by fusion. Five different copper(II) dipicolinates are known ; because of the strong tendency of this ligand to form tridentate mononuclear complexes, all of them, except monoclinic Cu(dipic) · 2H2O, belong to the class of molecular solids. In the monoclinic dihydrate, carbonyl O atoms are involved in defining chains that run parallel to [001] planes. Copyright © 1996 Elsevier Science Ltd.
title The crystal chemistry of copper(II) dipicolinates
spellingShingle The crystal chemistry of copper(II) dipicolinates
title_short The crystal chemistry of copper(II) dipicolinates
title_full The crystal chemistry of copper(II) dipicolinates
title_fullStr The crystal chemistry of copper(II) dipicolinates
title_full_unstemmed The crystal chemistry of copper(II) dipicolinates
title_sort crystal chemistry of copper(ii) dipicolinates
publishDate 1996
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02775387_v15_n24_p4531_Sileo
http://hdl.handle.net/20.500.12110/paper_02775387_v15_n24_p4531_Sileo
_version_ 1768544911042281472

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