Day: November 11, 2022

Aromi, Guillem published the artcileA systematic exploration of nickel-pyrazolinato chemistry with alkali metals: New cages from serendipitous assembly, Synthetic Route of 27412-71-1, the main research area is crystal structure alkali metal nickel pyrazolinolato pivalato multinuclear cluster; alkali metal nickel pyrazolinolato pivalato multinuclear cluster preparation structure; magnetic property nickel pyrazolinolato pivalato multinuclear cluster.

The preparation and properties of fourteen novel paramagnetic [NiIIx] aggregates bridged by pivalate, pyrazolinolate and in most cases hydroxide are reported. A rich structural diversity was achieved by changing the nature of the alkali of the base used during the synthesis, leading to the nuclearities [NiII4NaI4] (2, 3, 4), [NiII5NaI4] (5, 6, 7), [NiII5LiI6] (8), [NiII8MI2] [M = K (9, 10), Rb (11, 12), Cs (13, 14)] and [NiII8] (15). All compounds were characterized by single-crystal x-ray diffraction; however, full crystallog. details are given only for the representative mols. [Ni4Na4(fpo)4(piv)8(Hpiv)8] (2), [Ni5Na4(OH)2(mpo)4(piv)8(Hpiv)2(MeCN)2] (5), [Ni5Li6(OH)2(fpo)2(piv)12(Hpiv)4] (8), [Ni8K2(OH)4(ppo)4(piv)10(Hppo)2(Hpiv)2(MeCN)2] (9), [Ni8Rb2(OH)4(ppo)4(piv)10(Hppo)2(Hpiv)2(MeCN)2] (11), [Ni8Cs2(OH)4(ppo)4(piv)10(Hppo)2(Hpiv)2(MeCN)2] (13) and [Ni8(OH)4(mpo)2(PhCH2CO2)10(Hmpo)8] (15), where 5-R-3-pyrazolone [R = Me (Hmpo), Et (Hepo), CF3 (Hfpo), Ph (Hppo)]. Variable-temperature bulk magnetization measurements were performed for each type of complex. The [NiII4NaI4] clusters show intramol. antiferromagnetic coupling and a spin ground state of S = 0. [NiII5NaI4] also display antiferromagnetic superexchange, leading to an S = 1 spin ground state. The mol. with nuclearity [NiII5Li16], in contrast, exhibits ferromagnetic interactions, resulting in the presence of low energy states with high multiplicity, and a spin ground state S > 1. The [NiII8M12] and [NiII8] clusters have the same topol. of spin carriers, which display predominantly antiferromagnetic interactions to yield a diamagnetic ground state. The coupling within these octanuclear NiII clusters is rationalized in terms of the nature of the Ni-O-Ni angles within the core.

Chemistry – A European Journal published new progress about Antiferromagnetic exchange. 27412-71-1 belongs to class pyrazoles-derivatives, name is 5-Phenyl-1H-pyrazol-3(2H)-one, and the molecular formula is C9H8N2O, Synthetic Route of 27412-71-1.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Modi, C. K. published the artcileSome novel tetradentate Schiff base complexes VO(IV) and Cu(II) involving fluorinated heterocyclic β-diketones and polymethylene diamines of varying chain length, Category: pyrazoles-derivatives, the main research area is preparation fluoroacetylpyrazolinone alkyldiamine Schiff base transition metal complex; thermal decomposition fluoroacetylpyrazolinone alkyldiamine Schiff base transition metal complex.

The present article describes the synthesis, spectral, coordination and thermal aspects of N,N’-polymethylene bis(1-phenyl-3-methyl-4-trifluoroacetylimino-2-pyrazoline-5-ol)oxovanadium(IV) or copper(II) Schiff base complexes with alkyl backbones ranging from two to four carbons were characterized on the basis of elemental anal., magnetic moments, molar conductivity measurements, spectra (FTIR, ESR, UV-Visible, MS), VPO and thermal studies. The vapor pressure osmometry (VPO) and mass spectral studies indicate that the complexes are monomeric. An ESR study of all these complexes of VO(IV) and Cu(II) are consistent with the square pyramidal and square planar geometries of these metal ions, resp. In addition, the kinetics and thermodn. parameters for the different thermal decomposition steps of the complexes were studied employing Horowitz-Metzger and Freemen-Carroll methods.

Journal of Thermal Analysis and Calorimetry published new progress about Thermal decomposition. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Category: pyrazoles-derivatives.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Kottha, Thirumalaswamy S. published the artcileA Bioisosteric and Scaffold Hopping Approach for the Design and Synthesis of Double Ring Replacement Analogues of 4-Aryl-4H-Chromenes and in silico Tubulin Inhibitor Studies, Recommanded Product: 5-Phenyl-1H-pyrazol-3(2H)-one, the main research area is aryl chromene bioisosteric analog preparation green chem tubulin inhibitor.

An eco-friendly reaction protocol was developed for the synthesis of heterocyclic hybrid scaffolds through bioisosteric replacement and scaffold hopping approach. The isosteric analogs of salicylaldehyde were designed, identified/synthesized and employed in a three component reaction to afford bioisosteric analogs of 4-aryl-4H-chromenes. Thus central core swapping of benzene-pyridine/pyrazole ring on 4-aryl-4H-chromenes was achieved under simple one-pot reaction conditions and easy work-up. Docking studies show that almost all the compounds possess good binding affinities at the colchicine binding site of tubulin.

ChemistrySelect published new progress about Gastrointestinal absorption. 27412-71-1 belongs to class pyrazoles-derivatives, name is 5-Phenyl-1H-pyrazol-3(2H)-one, and the molecular formula is C9H8N2O, Recommanded Product: 5-Phenyl-1H-pyrazol-3(2H)-one.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics