Palladium(II)‐Komplexe des β‐(Diphenylphosphino)‐äthylpyridins‐(2) und des β‐(Diphenylarsino)‐äthylpyridins‐(2)

Abstract

Die Hybridliganden β‐(Diphenylphosphino)‐äthylpyridin‐(2)(DPPÄP) und β‐(Diphenylarsino)‐äthylpyridin‐(2) (DPAsÄP) bilden mit Palladium(II) 1,1‐ und 1,2‐Komplexe. Dabei fungieren sie in den 1,1‐Komplexen Pd(DPPAÄP)Cl2 und Pd(DPAsÄP)Cl2 und in den Perchloraten [Pd(DPPÄP)2](ClO4)2 und [Pd(DPAsÄP)2]((ClO4)2 zweizählig. In den Verbindungen Pd(DPPÄP)2Cl2 und Pd(DPAsÄP)2Cl2 dagegen besetzen sie nur eine Koordinationsstelle und zwar durch die Diphenylphosphino‐ bzw. die Diphenylarsinogruppe, die die weichen Donoratome Phosphor bzw. Arsen enthalten. Es werden die IR‐Spektren und die elektrische Leitfähigkeit der neuen Verbindungen diskutiert.

The development of phosphinoamine–Pd(II)–imidazole complexes: implications in room‐temperature Suzuki–Miyauracross‐coupling reaction

“…The precursor complexes [PdCl 2 (COD)] and [PdCl 2 (PPh 2 py‐P,N)] were synthesized according to the published procedure. Another previously reported precursor complex [PdCl 2 (PPh 2 Etpy‐P,N)] ( 3 ) was prepared by using [PdCl 2 (COD)] instead of [PdCl 2 (PhCN) 2 ] . The solvents used were of analytical grade and distilled and dried over 4 Å molecular sieves.…”

Copper(II)-catalysed oxidative carbonylation of aminols and amines in water: A direct access to oxazolidinones, ureas and carbamates

“…Copper complex (29H, 31H-phthalocyaninato(2-)-N29,N30,N31,N32) copper(II) (II) (INTATRADE GmbH) was commercially available, dichloro(2,2 -bipyridyl) copper(II) (III) [20], dichlorobis(triphenylphosphineoxide) copper(II) (I) [21], and dichloro [2-(␤-diphenylphosphinoethyl) pyridine]palladium(II) (IV) [22] were prepared according to the literature.…”

<b>Synthesis and characterisation of some metal complexes of hybrid phosphorus-nitrogenligands: the crystal structure of 1-(diphenylphosphino)-2-(2-pyridyl)ethane cobalt(II) chloride</b>

“…Some efforts in coordination chemistry research have recently been directed towards the study of metal complexes of the hybrid hemilabile P-N- [5][6][7][8][9][10][11][12], P-O- [13,14] or P-S- [15][16][17] type ligands. This is due to their structural features, reactivity and catalytic properties resulting from the combination of a soft phosphine moiety with a hard oxygen-or nitrogen-donor functionality.…”

“…Some of these complexes display P-and N-chelation where the P-and N-donors of the ligands are simultaneously bonded to the same metal centre [5][6][7][8][9][10][11][12]. In this way they behave as hemilabile ligands with one arm, strongly bonded to the electron-rich transition metal centre and the other forming a weak bond with the metal, which can readily dissociate to generate a vacant site on the metal for the formation and/or stabilization of an intermediate species.…”

“…Some complexes of the first row transition metals with these hybrid ligands have been reported but their structures have been established based on physical and spectroscopic measurements [5][6][7].…”