Unique high-spin-low-spin transition of the central ion in a linear, trinuclear iron(II) triazole compound

The reaction product of manganese(II) chloride and 2,5-diamino-l,3,4-thiadiazole was prepared and characterized by means of structural, and spectroscopic measurements. The crystals are monoclinic, space group C2/c, with a = 12.~03(4), b = 10.742(2), c = 10.449(5)A,/3 = 92.61(3) ~ and Z = 4. The structure was solved by the heavy-atom method, and least-squares refinement of structural parameters led to a conventional R factor of 0.020 for 1518 independent reflections. The structure consists of discrete molecules with twofold symmetry in which the manganese atom is coordinated in slightly distorted octahedral geometry by two nitrogen, two oxygen and two chlorine atoms.

show abstract

“…Bond distances and angles of the ring compare well with those found by other authors (Reimann, 1971;Vos, 1983;Prins, 1986).…”

Section: Crystal Structuresupporting

confidence: 88%

Synthesis, crystal and molecular structure, and spectroscopic properties of manganese(II) bis(2,5-diamino-1,3,4-thiadiazole) diaqua dichloride

Fabretti

Malavasi

Rossi

1993

Journal of Crystallographic and Spectroscopic Research

View full text Add to dashboard Cite

show abstract

“…Reedijk and co-workers reported studies of trimetallic and bimetallic, first row transition metal complexes in which the bridging ligands were alkylated 1,2,4-triazolyl moieties (1 2, 16-22) and several of these reports describe work performed on Co(I1) species. In their analyses of the magnetic properties of these compounds, however, JI3 was assumed to be zero and they cited several experimental findings to justify neglect of J,, in their modelling procedures (12,17,19,21). ple triazolyl bridges (23).…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Oligometallic cobalt 3,5-dimethylpyrazolate complexes: synthesis, structural and magnetic studies

Ehlert¹,

Rettig²,

Storr³

et al. 1993

Can. J. Chem.

View full text Add to dashboard Cite

IntroductionWe recently reported on a number of metal pyrazolate coinplexes containing copper or zinc ( 1-6). Particular emphasis was placed on studies of the magnetic properties of copper(I1) oligometallic and polymeric systems (1,(4)(5)(6), studies in which it was demonstrated that pyrazolate and substituted pyrazolate ligands are efficient mediators of antiferromagnetic exchange between copper centres.As part of our investigations of binary metal pyrazolates, generally, we have synthesized a number of polymeric cobalt(I1) pyrazolates (7). In the course of this work, two 3,5-dimethylpyrazolate-bridged complexes, the dimeric [Co(drnp~)~(Hdmpz)]~ and the trimetallic [Co(dmpz),Cl-(Hdmpz)],Co, were isolated in crystalline form suitable for single crystal X-ray diffraction studies. The structures and magnetic properties of these complexes, together with some studies on a dimeric-oligometallic material with the empirical formula C~( d m p z )~. 0.344(Hdmpz), form the basis of this communication. These materials provide important in-

show abstract

“…They also find applications as dyes, lubricants, analytical reagents [5] and antiviral agents [6]. The complexes containing 1,2,4-triazole ligands possess specific magnetic properties [7].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and crystal structure analysis of 2-(4-methyl-2′-biphenyl)-4-amino-1,2,4-triazole-3-thiol

et al. 2006

View full text Add to dashboard Cite

The bioactive compound 2-(4-methyl-2 -biphenyl)-4-amino-1,2,4-triazole-3-thiol, F.W. 282.09 was synthesized, characterized by spectroscopic techniques and confirmed by X-ray crystal structure analysis. The title compound crystallizes in monoclinic class under the space group P2 1 /c with cell parameters, a = 11.273(3) Å, b = 17.245(1) Å, c = 7.413(1) Å, β = 97.742(5) • and Z = 4. The structure exhibits inter-molecular hydrogen bonding of the type N-H···S.

show abstract

Unique high-spin-low-spin transition of the central ion in a linear, trinuclear iron(II) triazole compound

Cited by 123 publications

References 0 publications

Synthesis, crystal and molecular structure, and spectroscopic properties of manganese(II) bis(2,5-diamino-1,3,4-thiadiazole) diaqua dichloride

Synthesis, crystal and molecular structure, and spectroscopic properties of manganese(II) bis(2,5-diamino-1,3,4-thiadiazole) diaqua dichloride

Oligometallic cobalt 3,5-dimethylpyrazolate complexes: synthesis, structural and magnetic studies

Synthesis and crystal structure analysis of 2-(4-methyl-2′-biphenyl)-4-amino-1,2,4-triazole-3-thiol

Contact Info

Product

Resources

About