Komplexbildung mit Aminophosphinen. IX. Vier‐ und fünffach koordinierte Komplexverbindungen des Nickels mit N, N‐Bis(diphenylphosphino)anilin

Abstract

Die Synthese des leicht zugänglichen Diphosphinoanilins, PhN(PPh2)2, und verschiedene Typen seiner Chelatkomplexe mit Nickel(II) werden beschrieben. Der Ligand (NP2) bildet planare Komplexe [(NP2)NiX2] (X = Cl, Br, I, NCS) und [Ni(NP2)2](ClO4)2 sowie die fünffach koordinierten Verbindungen [(NP2)2NiX]ClO4. Für die letzteren wird eine quadratisch‐pyramidale Struktur angenommen.

On the Reactivity of the Iminodiphosphane C6H4(o‐CN)N=PPh2−PPh2: Fragmentation Versus Isomerisation

“…This peak probably corresponds to the free diphosphonylamine C 6 H 4 (o-CN)N(PPh 2 ) 2 (cf. the chemical shift of C 6 H 4 (o-OCH 3 )N(PPh 2 ) 2 is δ ϭ 65.6 ppm, [15] and C 6 H 5 N(PPh 2 ) 2 is δ ϭ 67.7 ppm [19] ). The 31 P NMR spectrum of 8 exhibits a signal at δ ϭ 27.0 ppm ( 1 J P,Pt ϭ 3377 Hz) typical of similar compounds, and there does not appear to be a significant influence on the chemical shift by virtue of the CN group.…”

Phosphorylation of Diaminopyridines: Synthesis of a Compound Containing Both a Diphosphinoamine (P–N–P) and an Iminobiphosphine (N=P–P) Fragment

“…However, the phosphorylation of amines is not always straightforward since formation of the final product is influenced by several factors including the nature of the base, the polarity of the solvent as well as electronic/steric effects 8. For example, anilines or alkyl‐substituted anilines afford almost exclusively diphosphinoamine (P–N–P) products9 whereas anilines with electron‐withdrawing groups afford iminobiphosphines (N=P–P) (Scheme ) 10…”

The Synthesis, Characterisation, and Reactivity of Some Polydentate Phosphinoamine Ligands with Benzene‐1,3‐diyl and Pyridine‐2,6‐diyl Backbones

“…Among the bis(phosphino)amines, (diphenylphosphino)aniline derivatives are the most frequently used precursors in investigations, because of their facile synthesis and high stability [12] [13]. Starting from the commercially available anilines and its derivatives, a large number of (diphenylphosphino)anilines have been prepared and characterised, and their reactivities have been investigated.…”