Phosphorus and Arsenic Donors

The complex (60) has vPH at 2326 cm h Values of vCO, and Cotton-Kraihanzel force constants for (61), where R = C6H2 Bu3-2,4,6, show that the phospha-alkyne is acting primarily as a a-donor.  

The complexes (62), where R = R = H or R = Me, R = H, have vNH near 3300 cm vCOO near 1600 cm together with bands characteristic of the PtPNP metallacycle. In (63), there are (PN bands from the ligand at 1206, 1181 and 1161 cm h  

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Table 6 Complexes with Phosphorus and Arsenic donors...

Reactions with Phosphorus and Arsenic Donor Ligands... 

The simple mixed donor macrocycles (14) at one time were the major sonrce of study of the influence of the incorporation of soft phosphorus and arsenic donors into macrocycles. Mixed oxygennitrogen macrocycles have been studied quite extensively, since they serve as bridges for examining the coordination tendencies of the aza macrocycles and the oxa crown ethers. 

A variety of phosphinoacetylenes has been prepared by reaction of an acetylene and a chlorophosphine in the presence of butyl-lithium. The synthesis of several quadridentate ligands containing both phosphorus and arsenic donor atoms, e.g (3), from a chlorophosphine and the appropriate lithio-derivative has been described. ... 

Phosphorus and Arsenic Donors. 8.1 Monodentate ligands. 8.2 Polydentate ligands... 

Table 2.27. Limiting first-order rate constants for the substitution reactions of Os3(CO)u(NCMe) with phosphorus and arsenic donor ligands...

Ph, Me) using polydentate phosphorus- and arsenic-donor ligands... 

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