260371-17-3

Upstream product

• 4930-98-7 pyrid-2-ylhydrazine 
• 50777-76-9 (2-formylphenyl)(diphenyl)phosphine 

Downstream Products

• 260371-37-7 Ni((C₆H₅)2PC₆H₄CHNNC₅H₄N)Cl 
• 260371-39-9 Ni(CH₃COO)(C₆H₅)2PC₆H₄CHNNC₅H₄N 
• 260371-38-8 Pd⁽²⁺⁾*CH₃COO^(1-)*(C₆H₅)2PC₆H₄CHNNC₅H₄N^(1-)=Pd(CH₃COO)(C₆H₅)2PC₆H₄CHNNC₅H₄N 
• 260371-34-4 PdCl(C₆H₅)2PC₆H₄CHNNHC₅H₄N⁽¹⁺⁾*Cl^(1-)=(PdCl(C₆H₅)2PC₆H₄CHNNHC₅H₄N)Cl 
• 1253849-09-0 [Cu(2-(diphenylphosphino)benzaldehyde 2-pyridylhydrazone)I]*CH₂Cl₂ 
• 1253849-15-8 [Pt(2-(diphenylphosphino)benzaldehyde 2-pyridylhydrazone-H)Cl] 
• 260371-35-5 PdCl(C₆H₅)2PC₆H₄CHNNC₅H₄N 
• 260371-40-2 Ni(C₆H₅CC)(C₆H₅)2PC₆H₄CHNNC₅H₄N 

Relevant academic research and scientific papers

Acid-base behavior of substituted hydrazone complexes controlled by the coordination geometry

A new series of substituted hydrazone complexes, [Cu(Hpbph)I] (1), [Cu(Hpbph)PPh3]PF6 (2-PF6), [NiCl- (Hpbph)]Cl (3-Cl), [PtCl(Hpbph)]ClO4 (4-ClO4), and [PtCl(pbph)] (4b) (Hpbph = 2-(diphenylphosphino)benzaldehyde 2-pyridylhydrazone) have been synthesized and characterized. X-ray crystallography revealed that the copper(I) complexes adopt pseudo-tetrahedral geometry, while the nickel(II) and platinum(II) complexes provide square-planar forms. All the complexes exhibit distinct color changes on the basis of the deprotonation/protonation on the ligand although their acid/base behaviors are largely different. The acidity constants (pKa) in methanol were determined to be 11.4 (1), 12.5 (2), 7.7 (3), and 6.7 (4). The results indicate that the dissociation of the proton on the ligand strongly depends on the ligand deformation controlled by the coordination geometry of the complexes and ancillary ligands also somewhat affect the acidity.