Issue 17, 1992

[Ru6C(CO)17]: a case of organometallic crystal polymorphism

Abstract

The molecular structure of the prototypical hexaruthenium carbidocarbonyl cluster [Ru6C(CO)17] has been redetermined on crystals obtained by two different routes. Form I is monoclinic, space group P21/n, a= 9.19(1), b= 32.043(9), c= 9.598(4)Å, β= 111.93(3)°, Z= 4, R= 0.076, R′= 0.079, for 2764 [Io > 2σ(Io)] out of 4755 absorption-corrected reflections; form II is also monoclinic, space group P2/a, a= 17.668(2), b= 9.335(1), c= 24.057(7)Å, β= 97.96(2)°, Z= 6, R= 0.023, R′= 0.028, for 7656 [Io > 2σ(Io)] out of 10 288 absorption-corrected reflections. The structural analysis shows that the complex possesses three different molecular structures in the solid state (I, IIA and IIB), differing essentially in the rotameric conformation of the tricarbonyl units above and below the equatorial plane containing bridging and semibridging ligands. The conformation is staggered in form I, while II contains two nearly eclipsed conformers. The relationship between the structure of the three isomers and of their crystals has been investigated.

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1992, 2565-2571

[Ru6C(CO)17]: a case of organometallic crystal polymorphism

D. Braga, F. Grepioni, P. J. Dyson, B. F. G. Johnson, P. Frediani, M. Bianchi and F. Piacenti, J. Chem. Soc., Dalton Trans., 1992, 2565 DOI: 10.1039/DT9920002565

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.

Spotlight

Advertisements