Palladium(II)-Komplexe des 1,1,3,3,5,5-Hexakis(dimethylamino)-λ5-[1,3,5]triphosphinins

Abstract

1,1,3,3,5,5‐Hexakis(dimethylamino)‐1λ5‐3λ5‐5λ5‐[1,3,5]triphosphinin (5) reagiert mit (Benzonitril)2PdCl2 zu dem Chelat‐Komplex Dichloro(dodeca‐N‐methyl‐1λ5,3λ5,5λ5‐1,3,5‐triphosphinin‐1,1,3,3,5,5‐hexaamin‐C2,C4)palladium (6). Wird 6 in Pyridin‐d5 gelöst, so entsteht Dichloro(dodeca‐N‐methyl‐1λ5,3λ5,5λ5‐1,3,5‐triphosphinin‐1,1,3,3,5,5‐hexaamin‐C2) ((2H5)pyridin‐N)palladium (7). 7 kann nicht als Feststoff isoliert werden, da nach Entfernen des Lösungsmittels 6 quantitativ zurückgebildet wird. Die Eigenschaften, NMR‐ und IR‐Spektren von 6 und 7 werden mitgeteilt. 6 ist zusätzlich durch die Ergebnisse einer Kristallstrukturanalyse charakterisiert.

Structural and bonding aspects of molybdenum tricarbonyl complexes of 2,4,6-tritertiarybutyl-1,3,5-triphosphabenzene, P3C3But3 and some λ3,λ3,λ5- and λ3,λ5,λ5-alkylated derivatives

“…Likewise, amino substituents should also have a similar effect to fluorine, as exemplified in the 1l 5 ,3l 5 ,5l 5 -triphosphabenzene ring, P 3 C 3 H 3 (NMe 2 ) 6 , synthesised by Fluck and coworkers, which is planar [15] whereas the parent molecule P 3 C 3 H 9 is not planar [13]. Some of the l 5 -phosphorus containing ylides are known to form complexes via the carbon atom of the ylidic bond, however these complexes are formed with late transition metals, for which there is no possibility to form h 6 -complexes with the ring p-system [16][17][18][19]. We wish to report herein new syntheses as well as structural, computational and bonding aspects of several molybdenum tricarbonyl complexes derived from the 2,4,6tritertiarybutyl-1,3,5-triphosphabenzene ring, P 3 C 3 Bu t 3 1, and some of its l 5 -alkylated derivatives.…”