Journal ArticleDOI
Synthesis and spectroscopic characterisation of cobalt(III) complexes with S-benzyl dithiocarbazate of 5-methyl-3-formyl pyrazole (HMPzSB): X-ray crystal structure of [Co(MPzSB) 2 ]Cl
TLDR
In this paper, the coordination mode of the title ligand, HMPzSB (synthesized for the first time and characterised by elemental analysis, mass, IR and PMR spectral parameters), is reported by solid state isolation and physicochemical identification of cobalt(III) complexes.About:
This article is published in Polyhedron.The article was published on 1997-08-26. It has received 36 citations till now. The article focuses on the topics: Ligand & Pyrazole.read more
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Metal complexes of pyrimidine derived ligands – Syntheses, characterization and X-ray crystal structures of Ni(II), Co(III) and Fe(III) complexes of Schiff base ligands derived from S -methyl/ S -benzyl dithiocarbazate and 2- S -methylmercapto-6-methylpyrimidine-4-carbaldehyde
Somnath C. Roy,Tarak Nath Mandal,Anil Kumar Barik,Sachindranath Pal,Samik Gupta,Arijit Hazra,Ray J. Butcher,Allen D. Hunter,Matthias Zeller,Susanta Kumar Kar +9 more
TL;DR: Two pyrimidine based NNS tridentate Schiff base ligands S-methyl-3-((2-S-methyl 6-methylpyrimidine-4-pyrimidyl)methyl)dithiocarbazate [HL1] and S-benzyl-3 -((S- methyl-6-methylmcapto-6methylpyridyl)-4-carbaldehyde)methyl)-dithIoB [HL2] have been synthesized by the 1:1 condensation of 2-Smethylmercapt
Journal ArticleDOI
Oxomolybdenum(VI) and (IV) complexes of pyrazole derived ONO donor ligands – synthesis, crystal structure studies and spectroelectrochemical correlation
Samik Gupta,Anil Kumar Barik,Sachindranath Pal,Arijit Hazra,Somnath C. Roy,Ray J. Butcher,Susanta Kumar Kar +6 more
TL;DR: In this paper, four cis-dioxomolybdenum complexes of general formula [MoO2(Ln)EtOH] (n = 1/4) with potentially tridentate Schiff bases derived from 5-methyl pyrazole-3-carbohydrazide and salicylaldehyde/substituted salicity-aldehyde/o-hydroxy acetophenone have been prepared.
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Synthesis and spectroscopic characterisation of cobalt(III) and nickel(II) complexes with 5-methyl-3-formylpyrazole-N(4)-dibutylthiosemicarbazone (HMPzNBu2): X-ray crystallography of [Co(MPzNBu2)2]NO3·H2O (I) and [Ni(HMPzNBu2)2](ClO4)2 (II)
TL;DR: In this article, cobalt(III) and nickel(II) complexes of 5-methyl-3-formylpyrazole-N(4)-dibutylthiosemicarbazone (HMPzNBu2), respectively, have been synthesised and physico-chemically characterised by magnetic measurements (polycrystalline state), 1H NMR [for Co(III), electronic and IR spectra.
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Synthesis and spectroscopic characterization of new cobalt(III) complexes with 5-methyl-3-formyl pyrazole 3-hexamethyleneiminyl thiosemicarbazone (HMPz3Hex): X-ray crystallographic identification of HMPz3Hex and [Co(MPz3Hex)2]Br · H2O with evidence for unusual rotation about the azomethine double bond of the ligand on complexation with cobalt(III)
TL;DR: In this paper, the coordinating properties of the title ligand, 5-methyl-3-formyl pyrazole 3-hexamethyleneiminyl thiosemicarbazone (HMPz3Hex), synthesized and characterized (elemental analysis, MS, IR, 1H and 13C NMR and X-ray crystallography) for the first time, are reported by solid-state isolation of cobalt(III) complexes.
Journal ArticleDOI
Evaluation of intramolecular equilibria in complexes formed between substituted imidazole ligands and nickel (II), copper (II) or zinc (II).
Helmut Sigel,Arati Saha,Nityananda Saha,Paolo Carloni,Paolo Carloni,Larisa E. Kapinos,Rolf Griesser +6 more
TL;DR: The indicated analysis regarding the intramolecular equilibrium between a monodentatally imidazole-nitrogen-coordinated (open) species and a chelated isomer provides helpful insights, e.g., the formation degree of chelates is more favored if six-membered rings can be formed, as in the case with M( BiImM)2+ compared to M(BiIm)2+, though in both instances the formation degrees of the chelate
References
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Journal ArticleDOI
A 2dvEv- bit distributed algorithm for the directed Euler trail problem
Wen-Huei Chen,Chuan Yi Tang +1 more
TL;DR: The algorithm can be used as a building block for solving other distributed graph problems, and can be slightly modified to run on a strongly-connected diagraph for generating the existent Euler trail or to report that no Euler trails exist.
Journal ArticleDOI
Cobalt(III) complexes with 2-acetyl- and 2-formylpyridine 4N-methylthiosemicarbazones
TL;DR: In this article, the crystal structures of 2-acetyl-and 2-formylpyridine 4 N -methylthiosemicarbazone, [Co(L4M) 2 ]BF 4 and Co(4M 2 ] BF 4, respectively, have been synthesized, their crystal structures solved and their spectral properties measured.
Journal ArticleDOI
Synthesis, characterisation and coordinating properties of a new pyrazole-derived thiosemicarbazone, a potential antiviral agent: Co(III), Ni(II) and Cu(II) complexes of neutral and deprotonated 5(3)-methylpyrazole-3(5)-aldehydothiosemicarbazone
TL;DR: In this article, the title compound (abbreviated as MPzATSH) has been synthesised and physico-chemically (IR, PMR and mass spectrum) characterised for the first time.
Journal ArticleDOI
Ligational Behaviour of a New Pyrazole Derived Thiosemicarbazone, a Potential Antiviral Agent: Cobalt(III), Nickel(II) and Copper(II) Complexes of Neutral and Deprotonated 5(3)-Methylpyrazole-3(5)-aldehydo-4-phenylthiosemicarbazone
TL;DR: In this paper, the coordinating behavior of the thiosemi-carbazone has been investigated by isolation and characterization of its complexes with Co(III), Ni(II), and Cu(II) having different counterions, Magnetic and spectral data indicate Co(MPzAP) 2X (X = counter ion) as spin paired octahedral species with the ligand in the deprotonated thiol form.
Journal ArticleDOI
Synthesis and spectroscopic characterization of nickel(II) complexes with 3,5-dimethyl-1-(o-aminophenyl)pyrazole (DApPz): X-ray crystallographic studies of [Ni(DApPz)2(H2O)2]Cl2·H2O and [Ni(DApPz)2(NCS)2]·H2O
Nityananda Saha,Arati Saha,Siddhartha Chaudhuri,Thomas C. W. Mak,T. Banerjee,Priyobroto Roychoudhury +5 more
TL;DR: The coordination mode of the title ligand, DApPz (synthesized and characterized by mass, IR and PMR spectral parameters), is reported by solid-state isolation and physico-chemical identification of a host of bis complexes of nickel(II) with different counter-ions.