Mössbauer and Infrared Spectra of Octahedral Complexes of Iron(II) Halides with Amides and Related Ligands

1972 ◽  
Vol 50 (2) ◽  
pp. 201-210 ◽  
Author(s):  
T. Birchall ◽  
M. F. Morris
Keyword(s):  
Infrared Spectra ◽  
Magnetic Measurements

A number of complexes of FeCl2 and FeBr2 with amides, ureas, aniline, and benzothiazole have been prepared and characterized by means of Mössbauer and i.r. spectroscopy, and magnetic measurements. The stoichiometries FeX2L, FeX2L2, FeX2L3, FeX2L4, and FeX2L6 have been found in which the iron is six coordinate. With the exception of an isobutyramide complex which is formulated as [Fe(BUA)6][FeCl4], complexes of the first three types are polymeric with bridging halogens, while FeX2L4 is monomeric and FeX2L6 is formulated as [FeL6]Cl2.

scholarly journals Tetranuclear Hetro-Metal [MnIII2NiII2] Complexes Involving Defective Double-Cubane Structure: Synthesis, Crystal Structures, and Magnetic Properties

2019 ◽  
Vol 5 (1) ◽  
pp. 14
Author(s):  
Yuki Suemitsu ◽  
Ryuji Matsunaga ◽  
Takashi Toyofuku ◽  
Yasunori Yamada ◽  
Masahiro Mikuriya ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Crystal Structures ◽  
Infrared Spectra ◽  
Magnetic Measurements ◽  
Metal Core ◽  
X Ray ◽  
Structure Synthesis ◽  
Elemental Analyses

Tetranuclear hetero-metal MnIII2NiII2 complexes, [Mn2Ni2(L)4(OAc)2] (1) and [Mn2Ni2(L)4(NO3)2] (2) [H2L = N-(2-hydroxymethylphenyl)-5,6-benzosalicylideneimine], have been synthesized and characterized by X-ray crystal structure analyses, infrared spectra, and elemental analyses. The structure analyses revealed that the complexes have a defective double-cubane metal core connected by μ3-alkoxo bridges. Complexes consist of two bis-μ-alkoxo bridged MnIIINiII heteronuclear units making a dimer-of-dimers structure. The double-cubane cores are significantly distorted due to an effect of syn–syn mode acetato or nitrato bridges. Magnetic measurements indicate that weak antiferromagnetic interactions (Mn-Ni = −0.66 ~ −4.19 cm–1) are dominant in the hetero-metal core.

Mössbauer and Infrared Spectra of Tetrahedral Complexes of Iron(II) Halides with Thioamides and Related Ligands

1972 ◽  
Vol 50 (2) ◽  
pp. 211-216 ◽  
Author(s):  
T. Birchall ◽  
M. F. Morris
Keyword(s):  
Infrared Spectroscopy ◽  
Infrared Spectra ◽  
Magnetic Measurements ◽  
Tetrahedral Complexes

A number of complexes of iron(II) halides with thioamides and ureas have been prepared and characterized by means of Mössbauer, infrared spectroscopy, and magnetic measurements. These complexes are shown to have distorted tetrahedral structures.

Spektroskopische Untersuchungen an Metallkomplexen des Antivirusmittels Isatin-3-thiosemicarbazon

1970 ◽  
Vol 25 (2) ◽  
pp. 199-204 ◽  
Author(s):  
P. Barz ◽  
H. P. Fritz
Keyword(s):  
Infrared Spectra ◽  
Magnetic Measurements ◽  
Methyl Derivative ◽  
Molecular Conformations

The infrared spectra of isatin-3-thiosemicarbazone and its 1-methyl derivative “Marboran” are discussed. By means of i.r. and 1H-n.m.r. spectra their molecular conformations in solid and dissolved state are established. Complexes of Cu (II), Cu (I), Ni (II) and Zn (II) as well as of Fe (II), and Co (II) were prepared. Their structures follow from spectra and magnetic measurements.

Some studies in inorganic complexes. XXVI. Complexes of 6-Methyl-2-thioamidopyridine

1971 ◽  
Vol 24 (5) ◽  
pp. 919 ◽  
Author(s):  
GJ Sutton
Keyword(s):  
Infrared Spectra ◽  
Magnetic Measurements ◽  
Visible Spectrum ◽  
Sulphur Atom ◽  
Chelating Ligand ◽  
Inorganic Complexes

Several complexes of the chelating ligand 6-methyl-2-thioamidopyridine have been prepared end studied. Infrared spectra indicate that the sulphur atom of the thioamido group is bonding in the complexes: [CoL2(H2O)2][ClO4]2, [NiL2Br2], [CuL2]I, [Ru2L4Cl2O]Cl2, [OsL2Cl2], [AuL][AuCl1], and [HgLI2] whereas nitrogen bonding occurs with [FeLCl3]2, [ZnL3][ClO4]2, [SnLI4], and the deprotonated species [In(L-H)3]. Copper(II) was reduced to copper(I), e.g. [CuL2][CuBr2]. Studies in the visible spectrum, magnetic measurements, and conductances in both nitrobenzene and dimethylformamide were also made.

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