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Phosphine–boranes Incorporating the Carborane Cluster by Rosario Núñez; Clara Viñas; Francesc Teixidor; Reijo Sillanpää; Raikko Kivekäs is a Chemistry article available to read on EtoBox.

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The high stability of the closo -carboranylmonophosphines and the low basicity and nucleophilicity are attributed to the electronwithdrawing character of the closo cluster. On the contrary, the nido cluster has an electron-donor character, which induces high electronic density on the phosphorus atom, then increasing the basicity and nucleophilicity of these ligands. In this way, the nidocarboranylmonophosphines react with ethanol to give the tertiary phosphonium salts and are readily oxidized by air in solution. They readily react with transition metals to form the corresponding metallacarboranes. To learn more of the distinct behavior of the closo -and nido -carboranylmonophosphines, the reaction of some of them with the BH 3 ×/THF Lewis acid has been carried out. In this communication, we report the reaction of closo -and nido -carboranylmonophosphines with BH 3 ×/THF leading to the formation of new phosphine Á/borane adducts. In the case of the nido -carboranylmonophosphines, all of them have shown a similar behavior irrespective of the nature of the R and R? groups. However, the closo -carboranylmonophosphines have demonstrated to be less basic and only one of them has been abl

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Author

Rosario Núñez; Clara Viñas; Francesc Teixidor; Reijo Sillanpää; Raikko Kivekäs

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-328X)

Published

2002

Language

EN

Field

Chemistry (Physical Sciences)