Issue 20, 2003

Synthesis and structural characterization of novel palladium complexes chelated by bulky cobalt-containing phosphine ligands: unusual palladium–cobalt bond formation

Abstract

The reaction of a bulky phosphine, [Co2(CO)5{μ-P,P-(μ-PPh2C[triple bond, length as m-dash]CPPh2)}][Co2(CO)4{μ-P-(μ-PPh2C[triple bond, length as m-dash]CPPh2)}] 1 with P(OMe)3 gave a phosphite substituted tetracobalt-complex, [Co2(CO)4{P(OMe)3}{μ-P,P-(μ-PPh2C[triple bond, length as m-dash]CPPh2)}][Co2(CO)4{μ-P-(μ-PPh2C[triple bond, length as m-dash]CPPh2)}] 5. Further reaction of 5 with (COD)PdCl2 yielded a 5 -coordinated palladium complex, [Co2(CO)4{P(OMe)3}}{μ-P,P-(μ-PPh2C[triple bond, length as m-dash]CPPh2)}][Co2(CO)3(μ-CO){μ-P-(μ-PPh2C[triple bond, length as m-dash]CPPh2)}]PdCl27. Similar results were obtained for the reaction of 1 with (COD)PdCl2, which yielded [Co2(CO)5{μ-P,P-(μ-PPh2C[triple bond, length as m-dash]CPPh2)}][Co2(CO)3(μ-CO){μ-P-(μ-PPh2C[triple bond, length as m-dash]CPPh2)}]PdCl26. Likewise, reaction of another bulky phosphine [(μ-Ph2PCH2PPh2)Co2(CO)4(μ-PPh2C[triple bond, length as m-dash]CP([double bond, length as m-dash]O)Ph2)] 3 with (COD)PdCl2 yielded [{μ-P,P-PPh2CH2PPh2}Co2(CO)3(μ-CO){μ-PPh2C[triple bond, length as m-dash]CP([double bond, length as m-dash]O)Ph2}]PdCl28. The X-ray structural studies of 6, 7 and 8 reveal that unusual palladium–cobalt bonds were formed. A Suzuki type reaction employing complexes 6, 7 and 8, as catalysts in the reaction of 2-bromothiophene with boronic acid did not show encouraging signs.

Graphical abstract: Synthesis and structural characterization of novel palladium complexes chelated by bulky cobalt-containing phosphine ligands: unusual palladium–cobalt bond formation

Supplementary files

Article information

Article type
Paper
Submitted
02 Jun 2003
Accepted
22 Aug 2003
First published
05 Sep 2003

Dalton Trans., 2003, 3892-3897

Synthesis and structural characterization of novel palladium complexes chelated by bulky cobalt-containing phosphine ligands: unusual palladium–cobalt bond formation

F. Hong, C. Chang and Y. Chang, Dalton Trans., 2003, 3892 DOI: 10.1039/B306228G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements