Water-soluble (Pterin)rhenium(I) complex: Synthesis, structural characterization, and two reversible protonation-deprotonation behavior in aqueous solutions

A new water-soluble complex, Re(CO) 3(pterin)(H 2O), was synthesized and characterized by 1H NMR and FTIR spectroscopy, and by a combination of three mass spectrometry techniques: MALDI, probe electrospray ionisation (PESI), and ESI. Because, unlike most metal-pterin complexes, the Re I complex is q...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2012
Materias:
Acidity
N,O ligands
Pterin
Rhenium
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14341948_v_n30_p4801_Ragone
http://hdl.handle.net/20.500.12110/paper_14341948_v_n30_p4801_Ragone
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14341948_v_n30_p4801_Ragone
record_format dspace
spelling paper:paper_14341948_v_n30_p4801_Ragone2023-06-08T16:14:29Z Water-soluble (Pterin)rhenium(I) complex: Synthesis, structural characterization, and two reversible protonation-deprotonation behavior in aqueous solutions Acidity N,O ligands Pterin Rhenium A new water-soluble complex, Re(CO) 3(pterin)(H 2O), was synthesized and characterized by 1H NMR and FTIR spectroscopy, and by a combination of three mass spectrometry techniques: MALDI, probe electrospray ionisation (PESI), and ESI. Because, unlike most metal-pterin complexes, the Re I complex is quite soluble in water, appropriate single crystals could be obtained for structural X-ray analysis. We report here the first solid state molecular structure containing a pterin ligand coordinated to the Re(CO) 3 core. This determination revealed that strong H bonds between the hydrogen atom of the 2-amino group and crystallization water molecules give rise to a polymeric arrangement of Re(CO) 3(pterin) (H 2O) complexes in the lattice. Protonation studies in aqueous solutions of the Re I complex showed two acid-base equilibriums with pK a1 = 3.9 and pK a2 = 8.8. pK a1 was assigned to the protonation equilibrium at N3 of the pterin ligand in the complex and pK a2 could be ascribed to the deprotonation of a coordinated water molecule. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14341948_v_n30_p4801_Ragone http://hdl.handle.net/20.500.12110/paper_14341948_v_n30_p4801_Ragone
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Acidity
N,O ligands
Pterin
Rhenium
spellingShingle Acidity
N,O ligands
Pterin
Rhenium
Water-soluble (Pterin)rhenium(I) complex: Synthesis, structural characterization, and two reversible protonation-deprotonation behavior in aqueous solutions
topic_facet Acidity
N,O ligands
Pterin
Rhenium
description A new water-soluble complex, Re(CO) 3(pterin)(H 2O), was synthesized and characterized by 1H NMR and FTIR spectroscopy, and by a combination of three mass spectrometry techniques: MALDI, probe electrospray ionisation (PESI), and ESI. Because, unlike most metal-pterin complexes, the Re I complex is quite soluble in water, appropriate single crystals could be obtained for structural X-ray analysis. We report here the first solid state molecular structure containing a pterin ligand coordinated to the Re(CO) 3 core. This determination revealed that strong H bonds between the hydrogen atom of the 2-amino group and crystallization water molecules give rise to a polymeric arrangement of Re(CO) 3(pterin) (H 2O) complexes in the lattice. Protonation studies in aqueous solutions of the Re I complex showed two acid-base equilibriums with pK a1 = 3.9 and pK a2 = 8.8. pK a1 was assigned to the protonation equilibrium at N3 of the pterin ligand in the complex and pK a2 could be ascribed to the deprotonation of a coordinated water molecule. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
title Water-soluble (Pterin)rhenium(I) complex: Synthesis, structural characterization, and two reversible protonation-deprotonation behavior in aqueous solutions
title_short Water-soluble (Pterin)rhenium(I) complex: Synthesis, structural characterization, and two reversible protonation-deprotonation behavior in aqueous solutions
title_full Water-soluble (Pterin)rhenium(I) complex: Synthesis, structural characterization, and two reversible protonation-deprotonation behavior in aqueous solutions
title_fullStr Water-soluble (Pterin)rhenium(I) complex: Synthesis, structural characterization, and two reversible protonation-deprotonation behavior in aqueous solutions
title_full_unstemmed Water-soluble (Pterin)rhenium(I) complex: Synthesis, structural characterization, and two reversible protonation-deprotonation behavior in aqueous solutions
title_sort water-soluble (pterin)rhenium(i) complex: synthesis, structural characterization, and two reversible protonation-deprotonation behavior in aqueous solutions
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14341948_v_n30_p4801_Ragone
http://hdl.handle.net/20.500.12110/paper_14341948_v_n30_p4801_Ragone
_version_ 1768545109441249280

Ejemplares similares