Structural studies of metal complexes of 2-pyridineformamide N(4)-methylthiosemicarbazone

Isabel García; Elena Bermejo; Ayman K. El Sawaf; Alfonso Castieiras; Douglas X. West

doi:10.1016/S0277-5387(02)00835-5

Structural studies of metal complexes of 2-pyridineformamide N(4)-methylthiosemicarbazone

Isabel García, Elena Bermejo, Ayman K. El Sawaf, Alfonso Castieiras, Douglas X. West

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

46 Scopus citations

Abstract

Reduction of 2-cyanopyridine by sodium in dry methanol in the presence of N(4)-methylthiosemicarbazide produces 2-pyridineformamide N(4)-methylthiosemicarbazone, HAm4M. In the crystals of [Ni(HAm4M)₂](ClO₄)₂·2H₂O, [Zn(Am4M)OAc]₂ and [Cd(HAm4M)Cl₂]·DMSO the major ligand coordinates via its pyridyl nitrogen, imine nitrogen and sulfur atoms, the last of which forms a thione in the neutral ligand HAm4M and a thiolato group in (Am4M)^-. Both the acetato ligands in [Zn(Am4M)OAc]₂ are bis-monodentate bridges, which is unique among acetato-bridged binuclear complexes of thiosemicarbazones of this type. As in the complexes of other 2-pyridineformamide thiosemicarbazones, hydrogen bonds play an important role in these compounds. As well as by X-ray diffractometry, the new compounds were characterized by elemental analysis, FAB mass spectrometry and IR spectroscopy; in the case of the nickel(II) complex, by electronic spectroscopy and by molar conductivity and magnetic susceptibility measurements; and in the case of the zinc(II) and cadmium(II) complexes, by NMR spectroscopy (¹H, ¹³C and, for Cd(II), ¹¹³Cd).

Original language	English
Pages (from-to)	729-737
Number of pages	9
Journal	Polyhedron
Volume	21
Issue number	7
DOIs	https://doi.org/10.1016/S0277-5387(02)00835-5
State	Published - 1 Apr 2002
Externally published	Yes

Keywords

2-Pyridineformamide
Cadmium(II)
Crystal structures
Nickel(II)
Thiosemicarbazone
Zinc(II)

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10.1016/S0277-5387(02)00835-5

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title = "Structural studies of metal complexes of 2-pyridineformamide N(4)-methylthiosemicarbazone",

abstract = "Reduction of 2-cyanopyridine by sodium in dry methanol in the presence of N(4)-methylthiosemicarbazide produces 2-pyridineformamide N(4)-methylthiosemicarbazone, HAm4M. In the crystals of [Ni(HAm4M)2](ClO4)2·2H2O, [Zn(Am4M)OAc]2 and [Cd(HAm4M)Cl2]·DMSO the major ligand coordinates via its pyridyl nitrogen, imine nitrogen and sulfur atoms, the last of which forms a thione in the neutral ligand HAm4M and a thiolato group in (Am4M)-. Both the acetato ligands in [Zn(Am4M)OAc]2 are bis-monodentate bridges, which is unique among acetato-bridged binuclear complexes of thiosemicarbazones of this type. As in the complexes of other 2-pyridineformamide thiosemicarbazones, hydrogen bonds play an important role in these compounds. As well as by X-ray diffractometry, the new compounds were characterized by elemental analysis, FAB mass spectrometry and IR spectroscopy; in the case of the nickel(II) complex, by electronic spectroscopy and by molar conductivity and magnetic susceptibility measurements; and in the case of the zinc(II) and cadmium(II) complexes, by NMR spectroscopy (1H, 13C and, for Cd(II), 113Cd).",

keywords = "2-Pyridineformamide, Cadmium(II), Crystal structures, Nickel(II), Thiosemicarbazone, Zinc(II)",

author = "Isabel Garc{\'i}a and Elena Bermejo and \{El Sawaf\}, \{Ayman K.\} and Alfonso Castieiras and West, \{Douglas X.\}",

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doi = "10.1016/S0277-5387(02)00835-5",

language = "English",

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T1 - Structural studies of metal complexes of 2-pyridineformamide N(4)-methylthiosemicarbazone

AU - García, Isabel

AU - Bermejo, Elena

AU - El Sawaf, Ayman K.

AU - Castieiras, Alfonso

AU - West, Douglas X.

PY - 2002/4/1

Y1 - 2002/4/1

N2 - Reduction of 2-cyanopyridine by sodium in dry methanol in the presence of N(4)-methylthiosemicarbazide produces 2-pyridineformamide N(4)-methylthiosemicarbazone, HAm4M. In the crystals of [Ni(HAm4M)2](ClO4)2·2H2O, [Zn(Am4M)OAc]2 and [Cd(HAm4M)Cl2]·DMSO the major ligand coordinates via its pyridyl nitrogen, imine nitrogen and sulfur atoms, the last of which forms a thione in the neutral ligand HAm4M and a thiolato group in (Am4M)-. Both the acetato ligands in [Zn(Am4M)OAc]2 are bis-monodentate bridges, which is unique among acetato-bridged binuclear complexes of thiosemicarbazones of this type. As in the complexes of other 2-pyridineformamide thiosemicarbazones, hydrogen bonds play an important role in these compounds. As well as by X-ray diffractometry, the new compounds were characterized by elemental analysis, FAB mass spectrometry and IR spectroscopy; in the case of the nickel(II) complex, by electronic spectroscopy and by molar conductivity and magnetic susceptibility measurements; and in the case of the zinc(II) and cadmium(II) complexes, by NMR spectroscopy (1H, 13C and, for Cd(II), 113Cd).

AB - Reduction of 2-cyanopyridine by sodium in dry methanol in the presence of N(4)-methylthiosemicarbazide produces 2-pyridineformamide N(4)-methylthiosemicarbazone, HAm4M. In the crystals of [Ni(HAm4M)2](ClO4)2·2H2O, [Zn(Am4M)OAc]2 and [Cd(HAm4M)Cl2]·DMSO the major ligand coordinates via its pyridyl nitrogen, imine nitrogen and sulfur atoms, the last of which forms a thione in the neutral ligand HAm4M and a thiolato group in (Am4M)-. Both the acetato ligands in [Zn(Am4M)OAc]2 are bis-monodentate bridges, which is unique among acetato-bridged binuclear complexes of thiosemicarbazones of this type. As in the complexes of other 2-pyridineformamide thiosemicarbazones, hydrogen bonds play an important role in these compounds. As well as by X-ray diffractometry, the new compounds were characterized by elemental analysis, FAB mass spectrometry and IR spectroscopy; in the case of the nickel(II) complex, by electronic spectroscopy and by molar conductivity and magnetic susceptibility measurements; and in the case of the zinc(II) and cadmium(II) complexes, by NMR spectroscopy (1H, 13C and, for Cd(II), 113Cd).

KW - 2-Pyridineformamide

KW - Cadmium(II)

KW - Crystal structures

KW - Nickel(II)

KW - Thiosemicarbazone

KW - Zinc(II)

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DO - 10.1016/S0277-5387(02)00835-5

M3 - Article

AN - SCOPUS:0036532013

SN - 0277-5387

VL - 21

SP - 729

EP - 737

JO - Polyhedron

JF - Polyhedron

IS - 7

ER -

Structural studies of metal complexes of 2-pyridineformamide N(4)-methylthiosemicarbazone

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Keywords

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