Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts

Tetra(alkoxybenzoato)dirhodium(II) complexes of the formula Rh2(x,y,z-BmOCn)4 (where B is the benzoate group; m is the number of alkoxy chains on the aromatic ring; x, y, and z are their positions of anchoring; and n is the number of carbon atoms in each alkoxy chain) and the corresponding pyrazine...

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Autores principales: Rusjan, Marcia Cecilia, Cukiernik, Fabio Daniel
Publicado: 2002
Materias:
carboxylic acid derivative
pyrazine derivative
rhodium complex
tetra(benzoato)dirhodium complex
unclassified drug
article
complex formation
crystal structure
liquid crystal
melting point
structure analysis
synthesis
temperature dependence
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v14_n4_p1564_Rusjan
http://hdl.handle.net/20.500.12110/paper_08974756_v14_n4_p1564_Rusjan
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_08974756_v14_n4_p1564_Rusjan2025-07-30T18:25:35Z Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts Rusjan, Marcia Cecilia Cukiernik, Fabio Daniel carboxylic acid derivative pyrazine derivative rhodium complex tetra(benzoato)dirhodium complex unclassified drug article complex formation crystal structure liquid crystal melting point structure analysis synthesis temperature dependence Tetra(alkoxybenzoato)dirhodium(II) complexes of the formula Rh2(x,y,z-BmOCn)4 (where B is the benzoate group; m is the number of alkoxy chains on the aromatic ring; x, y, and z are their positions of anchoring; and n is the number of carbon atoms in each alkoxy chain) and the corresponding pyrazine adducts have been synthesized and characterized. The pyrazine adducts were prepared to have a polymeric structure via connected metallic centers. The complexes synthesized are Rh2(3,4,5-B3OCn)4 for n = 8, 10, 14, and 18; Rh2(3,4-B2OCn)4 for n = 9, 14, and 18; and Rh2(3,5-B2OCn)4 for n = 9 and 18, as well as the corresponding pyrazine adducts [Rh2(3,4,5-B3OCn)4pz]x for n = 10, 14, and 18; [Rh2(3,4-B2OCn)4pz]x for n = 14 and 18; and [Rh2(3,5-B2OCn)4pz]x for n = 9 and 18. Their liquid-crystalline (LC) properties have been analyzed. Most of them exhibit LC columnar and cubic mesophases with melting transition temperatures close to or even below room temperature. The mesomorphic character of the pyrazinic compounds, compared to the nonmesomorphic aliphatic carboxylate analogues, can be interpreted in terms of the ability of the equatorial ligands to fill the interdimeric space efficiently. Some internal characteristics about the arrangement of the molecules inside the columns are discussed. Fil:Rusjan, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cukiernik, F.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v14_n4_p1564_Rusjan http://hdl.handle.net/20.500.12110/paper_08974756_v14_n4_p1564_Rusjan
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic carboxylic acid derivative
pyrazine derivative
rhodium complex
tetra(benzoato)dirhodium complex
unclassified drug
article
complex formation
crystal structure
liquid crystal
melting point
structure analysis
synthesis
temperature dependence
spellingShingle carboxylic acid derivative
pyrazine derivative
rhodium complex
tetra(benzoato)dirhodium complex
unclassified drug
article
complex formation
crystal structure
liquid crystal
melting point
structure analysis
synthesis
temperature dependence
Rusjan, Marcia Cecilia
Cukiernik, Fabio Daniel
Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts
topic_facet carboxylic acid derivative
pyrazine derivative
rhodium complex
tetra(benzoato)dirhodium complex
unclassified drug
article
complex formation
crystal structure
liquid crystal
melting point
structure analysis
synthesis
temperature dependence
description Tetra(alkoxybenzoato)dirhodium(II) complexes of the formula Rh2(x,y,z-BmOCn)4 (where B is the benzoate group; m is the number of alkoxy chains on the aromatic ring; x, y, and z are their positions of anchoring; and n is the number of carbon atoms in each alkoxy chain) and the corresponding pyrazine adducts have been synthesized and characterized. The pyrazine adducts were prepared to have a polymeric structure via connected metallic centers. The complexes synthesized are Rh2(3,4,5-B3OCn)4 for n = 8, 10, 14, and 18; Rh2(3,4-B2OCn)4 for n = 9, 14, and 18; and Rh2(3,5-B2OCn)4 for n = 9 and 18, as well as the corresponding pyrazine adducts [Rh2(3,4,5-B3OCn)4pz]x for n = 10, 14, and 18; [Rh2(3,4-B2OCn)4pz]x for n = 14 and 18; and [Rh2(3,5-B2OCn)4pz]x for n = 9 and 18. Their liquid-crystalline (LC) properties have been analyzed. Most of them exhibit LC columnar and cubic mesophases with melting transition temperatures close to or even below room temperature. The mesomorphic character of the pyrazinic compounds, compared to the nonmesomorphic aliphatic carboxylate analogues, can be interpreted in terms of the ability of the equatorial ligands to fill the interdimeric space efficiently. Some internal characteristics about the arrangement of the molecules inside the columns are discussed.
author Rusjan, Marcia Cecilia
Cukiernik, Fabio Daniel
author_facet Rusjan, Marcia Cecilia
Cukiernik, Fabio Daniel
author_sort Rusjan, Marcia Cecilia
title Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts
title_short Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts
title_full Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts
title_fullStr Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts
title_full_unstemmed Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts
title_sort liquid-crystalline materials based on rhodium carboxylate coordination polymers: synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(ii) complexes and their pyrazine adducts
publishDate 2002
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v14_n4_p1564_Rusjan
http://hdl.handle.net/20.500.12110/paper_08974756_v14_n4_p1564_Rusjan
work_keys_str_mv AT rusjanmarciacecilia liquidcrystallinematerialsbasedonrhodiumcarboxylatecoordinationpolymerssynthesischaracterizationandmesomorphicpropertiesoftetraalkoxybenzoatodirhodiumiicomplexesandtheirpyrazineadducts
AT cukiernikfabiodaniel liquidcrystallinematerialsbasedonrhodiumcarboxylatecoordinationpolymerssynthesischaracterizationandmesomorphicpropertiesoftetraalkoxybenzoatodirhodiumiicomplexesandtheirpyrazineadducts
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