Triligating 11-membered rings containing tert-phosphino sites. Synthesis and structure

Phosphinoalkylnitrile: Synthese und Koordinationsverhalten an Palladiumzentren / Phosphinoalkylnitnles: Synthesis and Coordination Behaviour at Palladium Centres

“…Entspre chende R eaktionen wurden zuerst von Grim [9] mit einem Ü berschuß an U j '-D ichloralkanen durch geführt. Inzw ischen ist diese Reaktion durch die V erwendung äquim olarer M engen entsprechen der a-B rom -u;-chloralkane entscheidend verbes sert worden [12]. W ir fanden ebenfalls, daß die Substitution der besseren A bgangsgruppe Bromid zu guten A usbeuten führt, insbesondere dann.…”

The effect of substitution of a thioether donor by a phosphine donor in thiacrown complexes of iron

“…The less strained trans-14P2S2 has comparatively long P-C bonds 1.854(7) and 1.837(7) Å 16]. In the eleven-membered rings 2,6,10-triphenyl-2,6,10-triphosphabicyclo(9.4.0)pentadeca-11(1),12,14-triene and 6-phenyl-6-phospha-2,10dithiabicyclo(9.4.0)pentadeca-11(1),12,14-triene[17] the P-C bonds lengths are in range 1.834(8) -1.862(8) and in the twelve-membered 1,5,9-triphospha-1,5,9-tris(2-propyl)cyclododecane the range is 1.831(5) to 1.862(5)[18]. It can be concluded that in [Fe(9PS2) 2 ] 2+ the C-S bonds are significantly lengthened while P-C bonds are relatively unchanged compared with uncoordinated systems.…”

A New Kinetic Template Synthesis of Triphosphacyclodecanes

“…Early preparations including those of Horner et al [1] and Kyba et al [2] were by metal-free solution or high dilution methods, and were nonstereoselective giving a mixture of all possible isomers of the macrocycles. For the smallest triphosphorus macrocyclic ring system ( [11]aneP 3 ) known to date, Kyba et al achieved the separation and characterization of all isomers; for the syn,syn,anti ligand isomer vigorous conditions (boiling xylenes) were required for the inversion of the phosphorus center and formation of facially coordinated complexes.…”