Alumina-enriched sunflower bio-oil in machining of Hastelloy C-276: a fuzzy Mamdani model-aided sustainable manufacturing paradigm.

With the increasing emphasis on sustainable manufacturing practices, eco-friendly lubricants have gained significant attention to moderate the friction coefficient at the tool-work interface. In line with this, the contemporary study aimed to examine the viability of Alumina-enriched sunflower bio-oil as a metalworking fluid. Different volume fractions of Alumina nanoparticles (varying from 0 to 1 vol%) were mixed with sunflower bio-oil, and the physical properties, for instance, contact angle and dynamic viscosity, were analyzed to determine the optimal concentration of Alumina.

Influence of the Steric/Electronic Properties of -Aryl Substituents in Cycloplatinated Guanidinate(1-) Complexes on the Formation of Discrete Pt → Ag Complexes and One-Dimensional Coordination Polymer.

The reactions of cycloplatinated guanidinate(1-) complexes - with AgTFA (TFA = OC(O)CF) in 1:1 and 1:2 Pt/Ag molar ratios afforded complexes containing three types of PtAg skeletons (-, , and ), one 1D CP containing PtAg skeleton (), and a PtAg complex () in 91-95% (method 1), 73-82% (method 2) (-), and 54-79% (, , , and ) yields. The reactions of with 2,6-XylNC (2,6-Xyl = 2,6-MeCH) and 4-DMAP (4-dimethylaminopyridine) gave a neutral complex and an ionic complex , respectively. Molecular structures of 12 complexes were unambiguously determined by single-crystal X-ray diffraction.

Reactions of Cycloplatinated Guanidine Complexes with Hg(OC(O)CF): Formation of a One-Dimensional Coordination Polymer Containing a PtHg(μ-S(O)Me-,) Repeating Unit versus a Discrete PtHg Complex.

Separate reactions of cycloplatinated 2-tolyl- and 2-anisylguanidine complexes, [Pt{κ(,)}(OC(O)CF)(S(O)Me)] ( and ), with Hg(OC(O)CF) in 1:0.5 and 1:1 molar ratios afforded the one-dimensional coordination polymer (1D CP) {[Pt{κ(,)}(OC(O)CF)]Hg}(μ-S(O)Me-,)·CH (·CH) as bright red crystals and the discrete tetrametallic complex [Pt{κ(,)}(μ-OC(O)CF)Hg-] () as yellow crystals in good yields. The two different products obtained in the aforementioned reactions are ascribed to the subtle differences in the N substituent of the guanidinate(1-) ligands in and .

Critical Role of Anions in Platinum(II) Precursors upon the Structural Motifs of Six-Membered Cycloplatinated ,',″-Triarylguanidines.

The reactions of -[Pt(OAc)(DMSO)] with 2 equiv of ,',″-triarylguanidines, [ArN=C(NHAr)], in toluene under reflux condition for 8 h afforded six-membered cycloplatinated guanidines, [Pt{κ(,)}(OAc){κ (ArN=C(NHAr))}] [ = symmetrical; Ar = 2-MeCH () and 2,4-MeCH ()], in 82 and 84% yields, respectively. The salt metathesis reaction of with 1 equiv of AgTFA in CHCl at room temperature (RT) afforded [Pt{κ(,)}(TFA){κ (ArN=C(NHAr))}] () in 94% yield. The reaction of -[Pt(TFA)(DMSO)] with 1 equiv of [ArN=C(NHAr)] in toluene under reflux condition for 8 h afforded six-membered cycloplatinated guanidines, [Pt{κ(,)}(TFA)(DMSO)] [Ar = 2-MeCH (), 4-MeCH (), 2,4-MeCH (), and 2-(MeO)CH ()], in ≥73% yields.